Prof. E. Fred Schubert Profile

Prof. E. Fred Schubert

Wellfleet Senior Constellation Professor at Rensselaer Polytechnic Institute

SPIE Involvement:

Track Chair | Author | Instructor

Area of Expertise:

Semiconductor materials , Light-emitting-diodes , Lighting , Semiconductor devices , Optoelectronic devices , Solid-state lighting

Websites:

Personal Website | Company Website

Profile Summary

E. Fred Schubert made pioneering contributions to the field of compound semiconductor materials and devices, particularly to the doping of compound semiconductors and to the development and understanding of light-emitting diodes. He is currently a distinguished professor at Rensselaer Polytechnic Institute in Troy NY. He authored the books Doping in III–V Semiconductors (1992), Delta Doping of Semiconductors (1996), and Light-Emitting Diodes (1st edition 2003 and 2nd edition 2006). He is co-inventor of more than 30 US patents and co-authored more than 300 publications. He is a Fellow of the APS, IEEE, OSA, and SPIE and has received several awards.

Publications (30)

Proceedings Article | 11 November 2016 Presentation

Presentation

An elegant route to overcome fundamentally-limited light extraction in AlGaN deep-ultraviolet light-emitting diodes: preferential outcoupling of strong in-plane emission (Conference Presentation)

Jong Kyu Kim, Jong Won Lee, Dong-Yeong Kim, Jun Hyuk Park, E. Fred Schubert, Jungsub Kim, Yong-Il Kim

Proceedings Volume 9926, 99260F (2016) https://doi.org/10.1117/12.2236420

KEYWORDS: Light emitting diodes, Deep ultraviolet, Ultraviolet radiation, External quantum efficiency, Light sources, Quantum efficiency, Visible radiation, Crystals, Mirrors, Quantum wells

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Proceedings Article | 28 August 2015 Paper

Paper

Development of large area nanostructured antireflection coatings for EO/IR sensor applications

Ashok Sood, Gopal Pethuraja, Roger Welser, Yash Puri, Nibir Dhar, Priyalal Wijewarnasuriya, Jay Lewis, Harry Efsthadiatis, Pradeep Haldar, E. Schubert

Proceedings Volume 9609, 96090D (2015) https://doi.org/10.1117/12.2214877

KEYWORDS: Glasses, Antireflective coatings, Nanostructuring, Transmittance, Sensors, Silica, Refractive index, Semiconducting wafers, Reflection, Visible radiation

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Proceedings Article | 19 September 2013 Paper

Paper

Development of large area nanostructured AR coatings for EO/IR sensor applications

Ashok Sood, Gopal Pethuraja, Adam Sood, Roger Welser, Yash Puri, Pradeep Haldar, E. Fred Schubert, Nibir Dhar, Priyalal Wijewarnasuriya

Proceedings Volume 8868, 88680P (2013) https://doi.org/10.1117/12.2032206

KEYWORDS: Antireflective coatings, Nanostructuring, Glasses, Silica, Transmittance, Refractive index, Sensors, Reflection, Reflectivity, Nanorods

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Proceedings Article | 15 October 2012 Paper

Paper

Development of large area nanostructure antireflection coatings for EO/IR sensor applications

Ashok Sood, Gopal Pethuraja, Adam Sood, Roger Welser, Yash Puri, Jaehee Cho, E. Schubert, Nibir Dhar, Priyalal Wijewarnasuriya, Martin Soprano

Proceedings Volume 8512, 85120R (2012) https://doi.org/10.1117/12.974239

KEYWORDS: Antireflective coatings, Nanostructuring, Glasses, Silica, Transmittance, Refractive index, Sensors, Reflection, Reflectivity, Nanorods

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Proceedings Article | 20 March 2012 Paper

Paper

Development of nanostructure based antireflection coatings for EO/IR sensor applications

Ashok Sood, Roger Welser, Adam Sood, Yash Puri, David Poxson, Jaehee Cho, E. Fred Schubert, Nibir Dhar, Martin Soprano, Raymond Balcerak

Proceedings Volume 8257, 82571C (2012) https://doi.org/10.1117/12.914374

KEYWORDS: Antireflective coatings, Sensors, Reflectivity, Silica, Near infrared, Transmittance, Glasses, Ultraviolet radiation, Nanowires, Nanorods

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Proceedings Article | 21 September 2011 Paper

Paper

High-voltage quantum well waveguide solar cells

Roger Welser, Gopal Pethuraja, Ashok Sood, Oleg Laboutin, Mark Chaplin, Van Un, Wayne Johnson, Adam Sood, David Poxson, Jaehee Cho, E. Fred Schubert, Pradeep Haldar, Jennifer Harvey

Proceedings Volume 8111, 81110I (2011) https://doi.org/10.1117/12.894682

KEYWORDS: Quantum wells, Indium gallium arsenide, Solar cells, Waveguides, Heterojunctions, Gallium arsenide, Diodes, Solar energy, Refractive index, Absorption

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Proceedings Article | 18 May 2011 Paper

Paper

Ultra-high transmittance through nanostructure-coated glass for solar cell applications

Roger Welser, Adam Sood, Ashok Sood, David Poxson, Sameer Chhajed, Jaehee Cho, E. Fred Schubert, Dennis Polla, Nibir Dhar

Proceedings Volume 8035, 80350X (2011) https://doi.org/10.1117/12.888129

KEYWORDS: Transmittance, Glasses, Refractive index, Silica, Antireflective coatings, Coating, Reflection, Solar cells, Thin films, Nanorods

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Proceedings Article | 11 February 2011 Paper

Paper

Nanostructre based antireflection coatings for EO/IR sensor applications

Ashok Sood, Roger Welser, Adam Sood, E. James Egerton, Yash Puri, David Poxson, Sammer Chhajed Jaehee Cho, E. Fred Schubert, Dennis Polla, Nibir Dhar, Raymond Balcerak, Martin Soprano

Proceedings Volume 7954, 79540W (2011) https://doi.org/10.1117/12.882535

KEYWORDS: Antireflective coatings, Sensors, Silica, Reflectivity, Ultraviolet radiation, Near infrared, Refractive index, Visible radiation, Nanowires, Nanorods

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Proceedings Article | 5 May 2010 Paper

Paper

Nanostructure-based antireflection coatings for EO/IR sensor applications

Ashok Sood, Roger Welser, Yash Puri, David Poxson, Martin Schubert, Jaehee Cho, E. Fred Schubert, Dennis Polla, Martin Soprano

Proceedings Volume 7679, 76792G (2010) https://doi.org/10.1117/12.852706

KEYWORDS: Antireflective coatings, Sensors, Silica, Reflectivity, Ultraviolet radiation, Near infrared, Refractive index, Visible radiation, Nanowires, Nanorods

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Proceedings Article | 4 September 2009 Paper

Paper

Design and development of nanostructure based antireflection coatings for EO/IR sensor applications

Ashok Sood, Roger Welser, Yash Puri, Martin Schubert, David Poxson, Jong Kyu Kim, E. Fred Schubert, Dennis Polla, Martin Soprano

Proceedings Volume 7419, 74190U (2009) https://doi.org/10.1117/12.829899

KEYWORDS: Antireflective coatings, Coating, Sensors, Reflectivity, Silica, Near infrared, Ultraviolet radiation, Visible radiation, Nanowires, Nanorods

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Proceedings Article | 18 August 2009 Paper

Paper

Color rendering ability and luminous efficacy enhancements in white light-emitting diodes

Roya Mirhosseini, Martin Schubert, Sameer Chhajed, Jaehee Cho, Jong Kyu Kim, E. Fred Schubert

Proceedings Volume 7422, 742212 (2009) https://doi.org/10.1117/12.836996

KEYWORDS: Light emitting diodes, Line edge roughness, Luminous efficacy, Light sources, Light, Blue light emitting diodes, Solids, Eye, Visible radiation, Lamps

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Proceedings Article | 21 September 2007 Paper

Paper

Conductive distributed Bragg reflector fabricated by oblique angle deposition from a single material

Martin Schubert, Jong Kyu Kim, Sameer Chhajed, E. Fred Schubert

Proceedings Volume 6674, 667403 (2007) https://doi.org/10.1117/12.731266

KEYWORDS: Refractive index, Thin films, Reflectivity, Distributed Bragg reflectors, Reflection, Absorption, Oxides, Photomicroscopy, Indium, Nanorods

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Proceedings Article | 13 February 2007 Paper

Paper

High refractive index nanoparticle-loaded encapsulants for light-emitting diodes

Frank Mont, Jong Kyu Kim, Martin Schubert, Hong Luo, E. Fred Schubert, Richard Siegel

Proceedings Volume 6486, 64861C (2007) https://doi.org/10.1117/12.723305

KEYWORDS: Nanoparticles, Epoxies, Refractive index, Scattering, Light emitting diodes, Transmittance, Rayleigh scattering, Silicon, Gallium nitride, Reflection

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Proceedings Article | 12 February 2007 Paper

Paper

High light-extraction efficiency in GaInN light-emitting diode with pyramid reflector

J-Q. Xi, Hong Luo, Jong Kyu Kim, E. Schubert

Proceedings Volume 6486, 648606 (2007) https://doi.org/10.1117/12.707267

KEYWORDS: Reflectors, Light emitting diodes, Silver, Gallium nitride, Sapphire, Ray tracing, Refractive index, Photomicroscopy, Geometrical optics, Semiconductors

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Proceedings Article | 22 February 2006 Paper

Paper

Omni-directional reflectors for light-emitting diodes

Jong Kyu Kim, J.-Q Xi, E. Fred Schubert

Proceedings Volume 6134, 61340D (2006) https://doi.org/10.1117/12.661563

KEYWORDS: Light emitting diodes, Reflectivity, Silver, Refractive index, Reflectors, Gallium nitride, Silicon, Metals, Lithium, Nanorods

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Proceedings Article | 22 February 2006 Paper

Paper

GaN light-emitting triodes for high-efficiency hole injection and light emission

Jong Kyu Kim, J.-Q. Xi, Hong Luo, Jaehee Cho, Cheolsoo Sone, Yongjo Park, Thomas Gessmann, J. Zavada, H. Jiang, E. Fred Schubert

Proceedings Volume 6134, 61340K (2006) https://doi.org/10.1117/12.647453

KEYWORDS: Light emitting diodes, Ultraviolet radiation, Electron beam lithography, Aluminum, Gallium, Laser sintering, Gallium nitride, Ultraviolet light emitting diodes, Superlattices, Energy efficiency

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Proceedings Article | 2 September 2005 Paper

Paper

Enhancement of light extraction in GaN light-emitting diodes by omni-directional reflectors with ITO nanorod low-refractive-index layer

Jong Kyu Kim, J.-Q. Xi, Hong Luo, Jaehee Cho, Cheolsoo Sone, Yongjo Park, E. Fred Schubert

Proceedings Volume 5941, 59410K (2005) https://doi.org/10.1117/12.621871

KEYWORDS: Light emitting diodes, Silver, Reflectivity, Gallium nitride, Reflectors, Refractive index, Metals, Thin films, Silicon, Nanorods

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Proceedings Article | 7 March 2005 Paper

Paper

Junction temperature in light-emitting diodes assessed by different methods

Sameer Chhajed, Yangang Xi, Thomas Gessmann, Jing-Qun Xi, Jay Shah, Jong Kyu Kim, E. Fred Schubert

Proceedings Volume 5739, (2005) https://doi.org/10.1117/12.593696

KEYWORDS: Light emitting diodes, Temperature metrology, Ultraviolet radiation, Luminous efficacy, Diodes, Light sources, Calibration, Resistance, Aluminium gallium indium phosphide, Electroluminescence

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Proceedings Article | 21 June 2004 Paper

Paper

Light-emitting diodes with integrated omnidirectionally reflective contacts

Thomas Gessmann, H. Luo, Jing-Qun Xi, Klaus Streubel, E. Fred Schubert

Proceedings Volume 5366, (2004) https://doi.org/10.1117/12.527952

KEYWORDS: Light emitting diodes, Reflectivity, Reflectors, Silicon, Gallium arsenide, Absorption, Semiconductors, Aluminium gallium indium phosphide, Metals, Dielectrics

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Proceedings Article | 26 January 2004 Paper

Paper

Performance characteristics of white light sources consisting of multiple light-emitting diodes

Yun-Li Li, Jay Shah, P.-H. Leung, Thomas Gessmann, E. Schubert

Proceedings Volume 5187, (2004) https://doi.org/10.1117/12.512529

KEYWORDS: Light sources, Luminous efficacy, Light emitting diodes, Luminous efficiency, Photons, Light, Quantum wells, Lithium, Colorimetry, Thermal effects

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Proceedings Article | 3 July 2003 Paper

Paper

GaInN light-emitting diodes with omnidirectional reflectors

Thomas Gessmann, Yun-Li Li, E. Schubert, John Graff, J. Sheu

Proceedings Volume 4996, (2003) https://doi.org/10.1117/12.479771

KEYWORDS: Light emitting diodes, Reflectors, Gallium nitride, Reflectivity, Silver, Nickel, Gold, Lithium, Oxides, Metals

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Proceedings Article | 3 July 2003 Paper

Paper

AlGaInP light-emitting diodes with omnidirectionally reflecting submount

Thomas Gessmann, E. Schubert, John Graff, Klaus Streubel

Proceedings Volume 4996, (2003) https://doi.org/10.1117/12.479770

KEYWORDS: Light emitting diodes, Reflectivity, Aluminium gallium indium phosphide, Metals, Silicon, Gallium arsenide, Reflectors, Semiconducting wafers, Semiconductors, Remote sensing

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Proceedings Article | 14 May 2001 Paper

Paper

Current crowding and optical saturation effects in GaInN/GaN LEDs grown on insulating substrates

Xiaoyun Guo, E. Schubert, Juergen Jahns

Proceedings Volume 4278, (2001) https://doi.org/10.1117/12.426843

KEYWORDS: Light emitting diodes, Gallium nitride, Dielectrics, Sapphire, Cladding, Diodes, Photomicroscopy, Instrument modeling, Silicon carbide, Resistance

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Proceedings Article | 17 April 2000 Paper

Paper

Photon recycling semiconductor light-emitting diode

Xiaoyun Guo, John Graff, E. Schubert, Robert Karlicek

Proceedings Volume 3938, (2000) https://doi.org/10.1117/12.382814

KEYWORDS: Light emitting diodes, Semiconductors, Light sources, Semiconducting wafers, Light, Blue light emitting diodes, Quantum efficiency, Gallium arsenide, Ultraviolet radiation, Optical semiconductors

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Proceedings Article | 7 April 1998 Paper

Paper

InGaN/GaN double heterostructure laser with cleaved facets

Dean Stocker, E. Schubert, W. Grieshaber, Karim Boutros, J. Flynn, Robert Vaudo, V. Phanse, Joan Redwing

Proceedings Volume 3284, (1998) https://doi.org/10.1117/12.304461

KEYWORDS: Sapphire, Heterojunctions, Gallium nitride, Semiconductor lasers, Metals, Reflection, Vapor phase epitaxy, Indium gallium nitride, Nitrogen lasers, Laser resonators

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Proceedings Article | 7 April 1998 Paper

Paper

Yellow photoluminescence in MOCVD-grown n-type GaN

E. Schubert, W. Grieshaber, Karim Boutros, Joan Redwing

Proceedings Volume 3279, (1998) https://doi.org/10.1117/12.304430

KEYWORDS: Luminescence, Gallium nitride, Ultraviolet radiation, Doping, Modulation, Semiconductors, N-type semiconductors, Neodymium, Electrons, Chlorine

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Proceedings Article | 4 April 1997 Paper

Paper

Photonic crystal light-emitting diodes

Shanhui Fan, Pierre Villeneuve, John Joannopoulos, E. Schubert

Proceedings Volume 3002, (1997) https://doi.org/10.1117/12.271043

KEYWORDS: Photonic crystals, Light emitting diodes, Dielectrics, Free space, Photons, Dispersion, Solids, Distributed Bragg reflectors, Quantum wells, Dielectric polarization

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Proceedings Article | 4 April 1997 Paper

Paper

Relevance of the GaN yellow luminescence for light-emitting diodes

W. Grieshaber, E. Schubert, Robert Karlicek, Matthew Schurman, Chuong Tran

Proceedings Volume 3002, (1997) https://doi.org/10.1117/12.271049

KEYWORDS: Luminescence, Gallium nitride, Ultraviolet radiation, Light emitting diodes, Semiconductors, Neodymium, Doping, Optoelectronic devices, Semiconductor lasers, Information operations

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Proceedings Article | 28 April 1995 Paper

Paper

Single-mode high-power lasers emitting at 980 nm

Niloy Dutta, William Hobson, John Lopata, E. Schubert, M. Passlack

Proceedings Volume 2382, (1995) https://doi.org/10.1117/12.208442

KEYWORDS: Quantum wells, Gallium arsenide, Cladding, Indium gallium phosphide, High power lasers, Laser damage threshold, Reliability, Erbium, Optical fibers, Optical amplifiers

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Proceedings Article | 24 April 1995 Paper

Paper

Er-doped Si/SiO2 microcavities

E. Schubert, J. Poate

Proceedings Volume 2397, (1995) https://doi.org/10.1117/12.206896

KEYWORDS: Optical microcavities, Erbium, Reflectivity, Luminescence, Absorption, Silicon, Active optics, Reflectors, Mirrors, Free space optics

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Showing 5 of 30 publications

Proceedings Volume Editor (10)

SPIE Conference Volume | 7 February 2006

Light-Emitting Diodes: Research, Manufacturing, and Applications X

SPIE Conference Volume | 7 March 2005

Light-Emitting Diodes: Research, Manufacturing, and Applications IX

SPIE Conference Volume | 21 June 2004

Light-Emitting Diodes: Research, Manufacturing, and Applications VIII

SPIE Conference Volume | 3 July 2003

Light-Emitting Diodes: Research, Manufacturing, and Applications VII

SPIE Conference Volume | 6 June 2002

Light-Emitting Diodes: Research, Manufacturing, and Applications VI

Showing 5 of 10 publications

Conference Committee Involvement (26)

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXII

29 January 2018 | San Francisco, California, United States

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI

30 January 2017 | San Francisco, California, United States

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XX

15 February 2016 | San Francisco, California, United States

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIX

10 February 2015 | San Francisco, California, United States

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVIII

4 February 2014 | San Francisco, California, United States

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVII

4 February 2013 | San Francisco, California, United States

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XVI

24 January 2012 | San Francisco, California, United States

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XV

25 January 2011 | San Francisco, California, United States

SPIE OPTO

22 January 2011 | San Francisco, United States

Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV

26 January 2010 | San Francisco, California, United States

SPIE OPTO

23 January 2010 | San Francisco, United States

LEDs: Materials, Devices, and Applications for Solid State Lighting XIII

27 January 2009 | San Jose, California, United States

SPIE OPTO: Integrated Optoelectronic Devices

24 January 2009 | San Jose, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications XII

22 January 2008 | San Jose, California, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications XI

24 January 2007 | San Jose, California, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications X

25 January 2006 | San Jose, California, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications IX

25 January 2005 | San Jose, California, United States

Fourth International Conference on Solid State Lighting

3 August 2004 | Denver, Colorado, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications VIII

27 January 2004 | San Jose, CA, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications VII

28 January 2003 | San Jose, CA, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications VI

22 January 2002 | San Jose, California, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications V

24 January 2001 | San Jose, CA, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications IV

26 January 2000 | San Jose, CA, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications III

27 January 1999 | San Jose, CA, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications II

28 January 1998 | San Jose, CA, United States

Light-Emitting Diodes: Research, Manufacturing, and Applications

13 February 1997 | San Jose, CA, United States

Showing 5 of 26 Conference Committees

Course Instructor

SC052: Light-Emitting Diodes

This course presents the history, operating principles, fabrication processes, and applications of light-emitting diodes (LEDs) with particular emphasis on solid-state lighting applications. The course provides an overview of LED fundamentals, design, and fabrication techniques. Furthermore, the fundamentals of solid-state lighting are discussed, including human factors, efficacy, efficiency, and color rendering properties of novel light sources. Although the course participants do not need to be specialists in optoelectronic device physics, familiarity with semiconductors is expected.

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