Milestone-Proposal talk:THE FIRST DEMONSTRATION OF THE SEMICONDUCTOR QUANTUM-WELL LASER DIODE, 1977

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Advocates’ Checklist (Read Only. Do Not Edit.)

Is the proposal for an achievement rather than for a person? If the citation includes a person's name, have the proposers provided the required justification for inclusion of the person's name?
Was the proposed achievement a significant advance rather than an incremental improvement to an existing technology?
Were there prior or contemporary achievements of a similar nature? If so, have they been properly considered in the background information and in the citation?
Has the achievement truly led to a functioning, useful, or marketable technology?
Is the proposal adequately supported by significant references (minimum of five) such as patents, contemporary newspaper articles, journal articles, or citations to pages in scholarly books? At least one of the references should be from a peer-reviewed scholarly book or journal article. The full text of the material, not just the references, shall be present. If the supporting texts are copyright-encumbered and cannot be posted on the ETHW for intellectual property reasons, the proposers shall email a copy to the History Center so that it can be forwarded to the Advocate. If the Advocate does not consider the supporting references sufficient, the Advocate may ask the proposer(s) for additional ones.
Are the scholarly references sufficiently recent?
Does the proposed citation explain why the achievement was successful and impactful?
Does the proposed citation include important technical aspects of the achievement?
Is the proposed citation readable and understandable by the general public?
Will the citation be read correctly in the future by only using past tense? Does the citation wording avoid statements that read accurately only at the time that the proposal is written?
Does the proposed plaque site fulfill the requirements as specified in the Milestones Guidelines? (i.e. publicly accessible, appropriately related to the achievement, etc.)
Is the proposal quality comparable to that of IEEE publications?
Are any scientific and technical units correct (e.g., km, mm, hertz, etc.)? Are acronyms correct and properly upper-cased or lower-cased? Are the letters in any acronym explained in the title or the citation?
Are date formats correct as specified in Section 6 of Milestones Program Guidelines? Helpful Hints on Citations, plaque locations
Do the year(s) appearing in the citation fall within the range of the year(s) included at the end of the title?
Note that it is the Advocate's responsibility to confirm that the independent reviewers have no conflict of interest (e.g., but not limited to: are not officers of a sponsoring IEEE OU, that they do not work for a company or a team involved in the achievement being proposed, that they have not published with the proposer(s), and have not worked on a project related to the funding of the achievement). An example of a way to check for this would be to search reviewers' publications on IEEE Xplore.
Are the GPS coordinates correct and in decimal format?
Is the proposed achievement controversial because of various reasons including but not limited to: ecological, environmental, social impact, political scandal, etc.? (A relatively simple Google search on the achievement by the advocate, combined with words such as "protest", "scandal", "environmental impact" should be sufficient to alert the advocate.)

Reviewers’ Checklist

Is suggested wording of the Plaque Citation accurate?
Is evidence presented in the proposal of sufficient substance and accuracy to support the Plaque Citation?
Does proposed milestone represent a significant technical achievement?
Were there similar or competing achievements? If so, have the proposers adequately described these and their relationship to the achievement being proposed?
Are the supporting reference texts credible? Are there reference texts which ought to have been included in support of the proposal, but which are missing?
If personal name(s) in the plaque citation, has proposer(s) demonstrated unassailably that the criteria for name inclusion in criteria have been met? The criteria are described in Section 6 of the IEEE Milestones Guidelines https://ieeemilestones.ethw.org/Milestone_Guidelines_and_How_to_Propose_a_Milestone#Citation

In answering the questions above, the History Committee asks that reviewers apply a similar level of rigor to that used to peer-review an article, or evaluate a research proposal. Some elaboration is desirable. Of course the Committee would welcome any additional observations that you may have regarding this proposal.

Submission and Approval Log

Submitted date: 3 September 2022
Advocate approval date:
History Committee approval date:
Board of Directors approval date:

Original Citation Title and Text -- Administrator4 (talk) 13:24, 26 October 2022 (UTC)

THE DEMONSTRATION OF THE SEMICONDUCTOR QUANTUM-WELL LASER DIODE, 1977

Professor Nick Holonyak, Jr. and his University of Illinois PhD graduate students demonstrated an ultra-thin heterostructure semiconductor diode laser employing quantum-size effects. The device was grown by liquid-phase epitaxy and took advantage of the inherent physical and optical properties of such quantum-well semiconductor layers in the device’s active region. Further development of these concepts led to commercialization of high-performance semiconductor lasers and light-emitting diodes.

Review Comments -- Jbart64 (talk) 19:52, 3 January 2025 (UTC)

Further work is needed on this proposal. Several questions remain incomplete, although some of the missing information is presented elsewhere. I also suggest rewording the milestone text to incorporate the explanations present in the historical explanations and also to tighten the claims. My suggested revision is (64 words):

Semiconductor Quantum-Well Laser Diode, 1977 Professor Nick Holonyak, Jr. and his University of Illinois Electrical Engineering Research Laboratory graduate students demonstrated a semiconductor diode laser employing quantum-size effects. The device was grown by liquid-phase epitaxy and took advantage of the inherent physical and optical properties of ultrathin semiconductor layers in the device’s active region. Further development of these concepts led to commercialization of high-performance semiconductor lasers and light-emitting diodes.

David Bart Milestone Advocate

Re: Review Comments -- Jbart64 (talk) 18:00, 7 February 2025 (UTC)

I have reviewed the updated proposal. I offer some suggested edits with explanations in []:

Recommended Title: Semiconductor Quantum-Well Laser Diode, 1977 [avoid the word first, the proposed wording is long, so I recommend shortening it to this]

Recommended Citation: Professor Nick Holonyak, Jr. and his University of Illinois Electrical Engineering Research Laboratory graduate students demonstrated a semiconductor diode laser employing quantum-size effects. The device was grown by liquid-phase epitaxy and took advantage of the inherent physical and optical properties of ultrathin semiconductor layers in the device’s active region. Further development of these concepts led to commercialization of high-performance semiconductor lasers and light-emitting diodes. [reconsider using this wording, the current proposal version is more than 70 words, use active voice verbiage, the proposed citation uses the word first which is always a risk]

Why was the achievement successful and impactful? [missing writeup]

Dave Bart

Revised Documents for Milestone 2022-07 -- Rddupuis (talk) 20:47, 9 April 2026 (UTC)

THE DEMONSTRATION OF THE SEMICONDUCTOR QUANTUM-WELL LASER DIODE, 1977: Professor Nick Holonyak, Jr. and his University of Illinois PhD graduate students demonstrated an ultra-thin heterostructure semiconductor diode laser employing quantum-size effects. The device was grown by liquid-phase epitaxy and took advantage of the inherent physical and optical properties of such quantum-well semiconductor layers in the device’s active region. Further development of these concepts led to commercialization of high-performance semiconductor lasers and light-emitting diodes.

Abstract (ADDED) In 1977, Nick Holonyak, Jr. and his PhD graduate students at the University of Illinois in Urbana, IL, demonstrated semiconductor laser diodes (LDs) having an active region composed of ultra-thin lattice-matched heterostructure layers that operated pulsed at 77K. These LDs were grown by relatively low-cost liquid-phase epitaxy and exhibited unique quantum-size effects due to the design of the active region. Further development by Holonyak and his collaborators of such LDs containing a variety of quantum-well active regions grown by metalorganic chemical vapor deposition (MOCVD) resulted in room-temperature operation, improved quantum efficiency, and high power efficiency, enabling the development of practical high-power, and high efficiency coherent light sources in many semiconductor materials and wavelength ranges. The further demonstration of low-threshold and high-reliability “quantum-well laser diodes” created a paradigm shift from simple active regions containing conventional double heterostructures to the more efficient QW active region designs. Today “quantum-well active regions” are employed in virtually all laser diodes, including vertical-cavity surface-emitting lasers (VCSELs), as well as in high-efficiency light-emitting diodes (LEDs), representing an extremely large market size with applications in many critical applications, e.g., telecommunications, biomedical applications and treatments, laser surgery, high-speed computing, data centers, accelerators for artificial intelligence, laser machining, three-dimensional sensing, secure optical links in space, LiDAR, etc. The QW LED is the standard design employed for energy-saving solid-state lighting world-wide. The development of the QW LD and LED has greatly contributed to the benefit of society through many consumer, medical, manufacturing, communication, security, and defense applications.

Please let me know what other changes or information you may need. Thank you Russell Dupuis April 09, 2026

Updated Milestone Advocate Review -- Jbart64 (talk) 18:27, 22 May 2026 (UTC)

I have reviewed the updated proposal. Much progress has been made. I offer some minor suggested edits. I believe this is the current version:

Title: The Semiconductor Quantum-Well Laser Diode, 1977 [delete 'The']

The quantum-well laser diode, a semiconductor heterostructure laser employing ultra-thin layers exhibiting quantum-size effects, was demonstrated by Nick Holonyak, Jr. and his graduate students [insert "at the University of Illinois"]. The device [insert "leveraged" and delete "took advantage of"] the inherent physical and optical properties of quantum-well semiconductor layers in the device’s active region. Further development of these concepts led to [insert "the"] commercialization of high-performance semiconductor lasers and light-emitting diodes, used for many important applications.

This is ready for expert review. I will begin making requests. Dave Bart

Expert Review #1 -- Jbart64 (talk) 14:39, 23 October 2026 (UTC)

I received the following expert review letter from Dr. Fumio Koyama. I provided the original letter to the proposers and staff. I posted the content below, omitting the private contact information. - David Bart

Fumio Koyama received the Ph.D. degree from the Tokyo Institute of Technology in 1985. He is the director-general (dean) of the Institute of Innovative Research, Tokyo Institute of Technology. His research interests include VCSEL photonics, photonic integrated devices, and optical sensing. He has authored or co-authored more than 1,000 journal and conference papers. He received various awards, including IEE Electronics Letters Premium, IEEE/LEOS William Streifer Scientific Achievement Award, the Holonyak Award, and the Okawa Award. He is a Fellow of OSA, IEEE, IEICE, and JSAP.

Koyama realized the first room-temperature cw operation of VCSELs in 1988. He has spent over 30 years improving and developing new functions for VCSELs. He proposed a new platform that laterally integrated VCSELs and optical functional devices. This allowed for the creation of a variety of new functions, including high-speed modulators, coupled resonators for high-speed direct modulation, high-resolution beam scanners, optical amplifiers, and spatial light switches.

October 23, 2026

Dear Members of the IEEE History Committee,

It is my pleasure to review the IEEE Milestone proposal concerning the 1977 demonstration of the quantum-well semiconductor laser diode at the University of Illinois. I strongly support recognition of this outstanding achievement and offer the following assessment and suggestions.

I am Fumio Koyama, Honorary Professor and Specially Appointed Professor at the Institute of Science Tokyo, formerly Tokyo Institute of Technology. I have conducted research at the forefront of semiconductor lasers, particularly vertical cavity surface-emitting lasers (VCSELs), for more than 45 years. My work encompasses their realization, performance improvement, photonic integration, optical communications, and sensing applications. My honors include the IEEE/LEOS William Streifer Scientific Achievement Award (2008), the Okawa Prize (2018), the Optica Nick Holonyak, Jr. Award (2019), the IEEE Nick Holonyak, Jr. Medal for Semiconductor Optoelectronic Technologies (2024), and the Japan Academy Prize (2026). I am an International Member of the U.S. National Academy of Engineering and a Fellow of IEEE, Optica, IEICE, and JSAP. This experience provides the basis for my assessment of the achievement and its lasting impact.

I have known the proposer, Professor Russell D. Dupuis, as a distinguished pioneer in semiconductor lasers through conferences and scientific publications for more than 40 years. I am also deeply familiar with the proposed achievement and have extensively employed quantum-well laser technology in my own research.

A) Historical significance of the achievements in the proposed milestone The 1977 demonstration by Nick Holonyak, Jr. and his graduate students established the electrically injected quantum-well laser diode. By using ultrathin semiconductor active layers exhibiting quantum-size effects, the team brought quantum confinement into a functioning injection laser. Achieving this with liquid-phase epitaxy, in a university laboratory and in a complex quaternary material system, was a remarkable accomplishment. It opened a path toward active-region engineering that became fundamental to semiconductor optoelectronics. The historical distinction is important. The proposal already cites and discusses the earlier optically pumped quantum-well laser oscillation reported by J. P. van der Ziel and colleagues in Applied Physics Letters 26, 463 (1975), as reference [7]. It also cites R. C. Miller and colleagues, Journal of Applied Physics 47, 4509 (1976), as reference [8], for comparisons of optically pumped multilayer structures. The proposal appropriately acknowledges these earlier optical-pumping studies. The defining achievement of the 1977 milestone was the first realization of an electrically injected quantum-well laser diode. Electrical injection was a decisive advance: it eliminated the need for an external optical pump and established that quantum-well gain could be harnessed in a compact, directly powered semiconductor device. This breakthrough provided the essential foundation for subsequent room-temperature and continuous-wave operation and opened the path to the widespread practical deployment of quantum-well lasers.

B) Impacts to our society Quantum-well active regions became the standard in any commercial semiconductor lasers, including edge-emitting lasers and VCSELs. Their ability to tailor electronic states and optical gain contributed to efficient, compact light sources across many wavelengths. Their worldwide significance extends far beyond the original laboratory demonstration. These lasers support optical fiber communications and the optical interconnects used in data centers and high-performance computing. They also serve optical data storage, optical sensing, ranging, medical systems, and industrial processing. Optical communication infrastructure built on semiconductor lasers is indispensable to the information society and to the expanding computing infrastructure supporting artificial intelligence. Related quantum-well structures also became central to efficient light-emitting diodes and solid-state lighting. These later developments involved many researchers and companies, but the 1977 injection-laser demonstration stands as a foundational experimental advance. The breadth and enduring scale of its benefit to humanity make it exceptionally worthy of IEEE Milestone recognition.

C) Proposed plaque citation and the evidence to support the citation The contemporary Rezek et al. papers cited in the proposal, Applied Physics Letters 31, 288 (1977) and IEEE Transactions on Electron Devices ED-24, 1204 (1977), provide credible primary support for the central achievement. The proposal also identifies relevant preceding and subsequent work. The supporting historical account is substantial; the revisions below would improve its completeness, precision, and accessibility. I agree with the Advocate’s recommendation for a concise title and a citation centered on the achievement.

In my assessment, the proposed citation accurately describes the central technical achievement, and the contemporary publications cited provide substantial and credible evidence supporting it. The suggested revisions concern historical precision, completeness, and clarity rather than the validity or significance of the achievement itself. Regarding the inclusion of Nick Holonyak, Jr.’s name in the plaque citation, the proposal identifies his central intellectual and technical leadership in developing the ultrathin-layer growth approach and realizing the quantum-well injection laser. I consider this a strong basis for including his name together with acknowledgment of his graduate students. I would like to support the inclusion of his name.

Optional comments for improvement

1. Title of the milestone The Advocate recommended “Semiconductor Quantum-Well Laser Diode, 1977” in January 2025 and, on 7 February 2025, explicitly advised avoiding “first” and shortening the wording. The May 2026 comments retained this concise approach. I support that editorial direction and suggest adding only “Injection,” giving “Semiconductor Quantum-Well Injection Laser Diode, 1977.” This explicitly identifies electrical injection as the excitation mechanism and distinguishes the 1977 achievement from the earlier optically pumped quantum-well lasers reported in 1975. ”Demonstration” is not excluded from IEEE Milestone titles: adopted examples include “First Demonstration of a Fibre Bragg Grating, 1978” (dedicated in 2023) and “Demonstration of the ALOHA Packet Radio Data Network, 1971” (dedicated in 2020). These precedents show that the word is permissible, but do not make it necessary here. The recorded objection concerned length and the priority term “first,” rather than a prohibition on “demonstration.” In this case, the shorter title with “Injection” is a more proportionate revision.

2. Early Patent I would like to suggest adding the Dingle–Henry patent as conceptual prior work. R. Dingle and C. H. Henry, “Quantum effects in heterostructure lasers,” U.S. Patent 3,982,207, was filed on 7 March 1975 and issued on 21 September 1976 to Bell Laboratories. It described quantized active layers, thickness-dependent emission, and potential threshold reduction through modification of the density of states, with electrical as well as optical pumping. This directly relevant contribution could be added to the background and supporting documents. Distinguishing this earlier concept from the 1977 experimental realization strengthens the historical account without diminishing the proposed milestone achievement.

3. Citation I also recommend shortening the citation and verify the casting layout. The supplied May 2026 citation contains 68 whitespace-separated words, but 74 words under IEEE guidance, which counts hyphenated compounds separately. Its body contains 531 characters including spaces and punctuation, with PDF line breaks normalized to spaces. It therefore exceeds the 70-word limit. The total character count, line breaks, and minimum castable lettering size should be checked with the History Center and manufacturer using an actual-size proof. In conclusion, the electrical injection quantum-well laser diode demonstrated in 1977 represents a scientific and engineering achievement of the highest international significance. Its influence on optical communications, data storage, sensing, and modern computing infrastructure is profound and enduring. I strongly support the proposed IEEE Milestone.

Fumio Koyama Honorary Professor/Specially Appointed Professor Institute of Science Tokyo (formerly Tokyo Institute of Technology)

Expert Review #2 -- Jbart64 (talk) 18:54, 5 November 2026 (UTC)

I received the following expert review email from Dr. Ted Thrush. I posted the content below, omitting the private contact information. - David Bart

Dr. E.J. "Ted" Thrush is a prominent British materials scientist and semiconductor engineering researcher. His publications include foundational research in pioneering Metalorganic Chemical Vapor Deposition (MOCVD/MOVPE) systems, primarily affiliated with Standard Telecommunication Laboratories (STL Harlow)/Bell-Northern Research, and later collaborating extensively with the University of Cambridge's Department of Materials Science and Metallurgy. His research heavily focuses on the epitaxial growth, defect tracking, and optimization of III-V compound semiconductor films used in high-efficiency optoelectronics, quantum wells, lasers, and LEDs, including Gallium Nitride (GaN) & Light-Emitting Diodes (LEDs), InGaN Quantum Wells & Microstructure Defects, and Modulators & Early Heterostructures. His earlier work in the late 1980s and 1990s focused on structural designs for quantum-confined Stark effect modulators and early optoelectronics for integration with 1.5 µm lasers. He was chief scientist for the equipment manufacturer Thomas Swan and maintained a symbiotic relationship with Cambridge University, enabling physics and equipment development to meet research needs. Since 2006, he has worked as a postdoctoral research associate at Cambridge University. He assesses LED devices fabricated from grown structures using a variety of optical and electrical characterization techniques, employing computer-driven scans of either voltage or current and synchronized light collection. He has been retired since 2017, having worked since 1965 in the field of semiconductor materials. His last job was at the University of Cambridge's Materials and Metallurgy Department, in the GaN group.

Emailed responses from Dr. Thrush dated November 5, 2026 -----

In summary, I support this proposal for a plaque recognizing this important scientific and technologically important breakthrough.

1. Is the suggested wording of the Plaque Citation accurate? Yes. I note that there is a recommendation to drop the term "First." Personally, I think that its use would add some “heft” to the citation and, if used in an appropriate framework of words, be of “low jeopardy." I also note that there is a recommendation to replace “took advantage of” with “leveraged”. To an English ear this does not seem to represent an improvement, lending, as it does, a corporate/financial “flavour” to the write up. I realise that this might well represent a transatlantic difference in sensibility, and acknowledge that it does save two words. I also note that the guidance regarding plaque inscription encourages a word count of 60 and this citation currently stands at 68. I have taken the liberty of concocting an alternative form of words, (given in italics below), which gets the number down to 60. I am happy that this offering be accepted in its entirety, picked from as considered appropriate, or ignored completely. --- [suggested citation text] The first reported electrically pumped quantum-well laser diode was demonstrated at the University of Illinois by Nick Holonyak, Jr. and his graduate students in 1977. It used an active region whose components were thin enough to exploit the modified band structure associated with quantum confinement, to improve performance. It set the scene for the commercialization of high-performance lasers and LEDs.

2. Is evidence presented in the proposal of sufficient substance and accuracy to support the Plaque Citation? Yes.

3. Does the proposed milestone represent a significant technical achievement? Yes. Speaking as someone who has grown semiconductor structures using Molecular Beam Epitaxy ( MBE), Metal Organic Chemical Vapour Deposition (MOCVD), and Liquid Phase Epitaxy, (LPE), the preparation of lattice-matched InP/GaInAsP structures incorporating layers sufficiently thin to achieve quantum size effects, by LPE, in 1977, does look, with hindsight, like quite a Tour de Force.

4. Were there similar or competing achievements? If so, have the proposers adequately described these and their relationship to the achievement being proposed? I believe the proposer has put the work described in this submission into a realistic context with respect to earlier achievements. Although quantum well lasing action was demonstrated in 1975 by a team from Bell Labs (J.P.van der Ziel, et al). I believe that the subsequent demonstration by Holonyak’s group in 1977 was of greater importance for the development of the technology for several reasons. Firstly, the Bell team achieved their laser action via photo pumping, which, whilst providing an adequate vehicle for proving that the theorists of the time had gotten it right, was less amenable to technological exploitation than the electrical pumping route demonstrated by the work covered by this citation. Secondly, the use by the Bell team of the intrinsically lattice-matched GaAs /AlGaAs system, whilst facilitating the growth of structures of high crystalline perfection, did not allow the near-infrared wavelength (1300-1500 nm (ish)) range, most suitable for use with the developing optical fiber of the time, to be addressed. The InP/GaInAsP alloy system, used by the Holonyak team, on the other hand, whilst presenting a bigger challenge to the crystal grower, did allow the relevant wavelength range to be covered. Finally, and probably most crucially, the mastery of fine structure control by a technique other than Molecular Beam Epitaxy (MBE) “gave the lie” to a notion, quite prevalent at the time, that only MBE with its capacity for monolayer in-situ monitoring/control could do this. This realisation catalysed the development of the rather more “maverick”, but much more readily scalable, MOCVD technique for use in fabricating fine semiconductor structures. The rest is history.

5. Have proposers shown a clear benefit to humanity? Yes. The proposer has produced an impressive list of devices and applications resulting from this technology, which have had a significant societal impact. The LED light bulb is clearly a major benefit to humanity, and whilst the impact of the Internet could be argued to be “a mixed blessing”, I personally believe that on the whole it is an asset.

6. Are the supporting reference texts credible? Are there reference texts which ought to have been included in support of the proposal, but which are missing? From what I can tell from this distance, the references used are credible and appropriate to setting this achievement in context. I would suggest that a paper by G.H. B. Thompson and P.A. Kirkby (J. Cryst. Growth 27 70 (1974)) might warrant inclusion in the reference list.

7. If personal name(s) are in the plaque citation, have the proposer(s) demonstrated unassailably that the criteria for name inclusion have been met? From my recollection of this period, Nick Holonyak was seen as the driving force and mentor of this illustrious research group and, as such, deserves recognition by name.

Expert Review #2 -- Jbart64 (talk) 19:02, 5 November 2026 (UTC)