Dr. Richard I. Epstein Profile

Dr. Richard I. Epstein

Professor

SPIE Involvement:

Conference Program Committee | Author | Editor

Publications (37)

Proceedings Article | 13 March 2024 Presentation

Brief history and outlook of laser cooling of solids

Denis Seletskiy, Richard Epstein

Proceedings Volume PC12902, PC1290201 (2024) https://doi.org/10.1117/12.3010152

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Proceedings Article | 17 March 2023 Presentation

Demonstration of diode-pumped optical refrigeration to cryogenic temperature

Alexander Albrecht, Jackson Kock, Seth Melgaard, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume PC12437, PC1243708 (2023) https://doi.org/10.1117/12.2652259

KEYWORDS: Cryogenics, Laser crystals, Crystals, Semiconductor lasers, High power fiber lasers, Fiber coupled lasers, Diodes, Dielectric mirrors, Absorption

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Proceedings Article | 17 March 2023 Presentation

Payload cooling to <125K using optical refrigeration in Yb:YLF

Jackson Kock, Alexander Albrecht, Duncan McGraw, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume PC12437, PC1243706 (2023) https://doi.org/10.1117/12.2652253

KEYWORDS: Luminescence, Reflectivity, Optical coatings, Mirrors, Crystals, Cryocoolers

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Proceedings Article | 9 March 2022 Presentation

Power scaling of Yb-based optical cryo-coolers

Jackson Kock, Azzurra Volpi, Alexander Albrecht, Duncan McGraw, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume PC12018, PC1201803 (2022) https://doi.org/10.1117/12.2611600

KEYWORDS: Crystals, Luminescence, Laser scattering, Laser crystals, Algorithm development, Thermometry, Scattering, Reflection, Modeling, Mirror mounts

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Proceedings Article | 9 March 2020 Presentation

The role of absorption saturation in optical refrigeration (Conference Presentation)

Azzurra Volpi, Jackson Kock, Alexander Albrecht, Markus Hehlen, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 11298, 1129809 (2020) https://doi.org/10.1117/12.2547681

KEYWORDS: Absorption, Temperature metrology, Cryogenics, Crystals

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Proceedings Article | 9 March 2020 Presentation

Advances in optical cryo-cooler device development (Conference Presentation)

Jackson Kock, Junwei Meng, Azzurra Volpi, Alexander Albrecht, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 11298, 1129808 (2020) https://doi.org/10.1117/12.2547614

KEYWORDS: Crystals, Thermography, Absorption, Magnesium fluoride, Cryocoolers, Laser crystals, Crystallography, Optical coatings, Silicon

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Proceedings Article | 4 March 2019 Presentation

Cryocooling arbitrary payloads: optical refrigeration coming of age (Conference Presentation)

Junwei Meng, Alexander Albrecht, Azzurra Volpi, Markus Hehlen, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 10936, 109360C (2019) https://doi.org/10.1117/12.2508825

KEYWORDS: Crystals, Mercury cadmium telluride, Infrared sensors, Environmental sensing, Luminescence, Thermography, Thermal modeling

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Proceedings Article | 9 May 2018 Presentation + Paper

Realization of an all-solid-state cryocooler using optical refrigeration

Junwei Meng, Alexander Albrecht, Aram Gragossian, Eric Lee, Azzurra Volpi, Mohammadreza Ghasemkhani, Markus Hehlen, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 10626, 106260B (2018) https://doi.org/10.1117/12.2305195

KEYWORDS: Crystals, Luminescence, Absorption, Laser crystals, Mirrors, Cryocoolers, Silicon, Thermography, Temperature sensors, Ytterbium

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Proceedings Article | 7 June 2017 Presentation

Recent advances in optical refrigeration of a load (Conference Presentation)

Aram Gragossian, Junwei Meng, Mohammadreza Ghasemkhani, Alexander Albrecht, Eric Lee, Bernardo Farfan, Guy Symonds, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 10180, 101800B (2017) https://doi.org/10.1117/12.2266159

KEYWORDS: Solids, Cryocoolers, Crystals, Laser crystals, Thermal efficiency, Luminescence, Prototyping, Thermography, Thermodynamics, Current controlled current source

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Proceedings Article | 17 May 2016 Paper

Cooling enhancement in optical refrigeration by non-resonant optical cavities

B. Farfan, A. Gragossian, G. Symonds, M. Ghasemkhani, A. Albrecht, M. Sheik-Bahae, R. Epstein

Proceedings Volume 9821, 982104 (2016) https://doi.org/10.1117/12.2222181

KEYWORDS: Mirrors, Optical resonators, Absorption, Crystals, Spherical lenses, Ray tracing, Luminescence, Optics manufacturing, Semiconductor lasers, Manufacturing

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Proceedings Article | 23 March 2016 Paper

Thermal management and design for optical refrigeration

G. Symonds, B. Farfan, M. Ghasemkhani, A. Albrecht, M. Sheik-Bahae, R. Epstein

Proceedings Volume 9765, 97650N (2016) https://doi.org/10.1117/12.2217964

KEYWORDS: Crystals, Sapphire, Thermography, Solids, Mirrors, Optical design, Epoxies, Luminescence, Optical cooling, Absorption

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Proceedings Article | 7 March 2016 Paper

Non-resonant optical cavity design for optical refrigeration

B. Farfan, G. Symonds, A. Gragossian, M. Ghasemkhani, A. Albrecht, M. Sheik-Bahae, R. Epstein

Proceedings Volume 9765, 97650Q (2016) https://doi.org/10.1117/12.2217519

KEYWORDS: Optical design, Reflectivity, Mirrors, Light, Fiber lasers, Manufacturing, Crystals, Absorption, Spherical lenses, Optics manufacturing, Ray tracing, Luminescence

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Proceedings Article | 24 June 2014 Paper

Optical cryocoolers for sensors and electronics

Richard Epstein, Markus Hehlen, Mansoor Sheik-Bahae, Seth Melgaard

Proceedings Volume 9070, 90702K (2014) https://doi.org/10.1117/12.2052941

KEYWORDS: Crystals, Laser crystals, Solids, Ions, Cryocoolers, Absorption, Glasses, Phonons, Luminescence, Quantum efficiency

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Proceedings Article | 19 February 2014 Paper

Device applications of cryogenic optical refrigeration

Seth Melgaard, Denis Seletskiy, Richard Epstein, Jay Alden, Mansoor Sheik-Bahae

Proceedings Volume 9000, 900002 (2014) https://doi.org/10.1117/12.2039956

KEYWORDS: Crystals, Luminescence, Cryogenics, Thermography, Absorption, Solids, Sapphire, Interfaces, Laser crystals, Mirrors

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Proceedings Article | 11 March 2013 Paper

Electrocaloric refrigerator using electrohydrodynamic flows in dielectric fluids

Markus Hehlen, Alexander Mueller, Nina Weisse-Bernstein, Richard Epstein

Proceedings Volume 8638, 86380D (2013) https://doi.org/10.1117/12.2004009

KEYWORDS: Switches, Capacitors, Electrodes, Dielectrics, Temperature metrology, Thin films, Ceramics, Copper, Convection, Microfluidics

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Proceedings Article | 8 February 2011 Paper

Progress toward sub-100 Kelvin operation of an optical cryocooler

Denis Seletskiy, Richard Epstein, Mansoor Sheik-Bahae

Proceedings Volume 7951, 795103 (2011) https://doi.org/10.1117/12.879050

KEYWORDS: Absorption, Cryocoolers, Luminescence, Crystals, Solids, Ytterbium, Temperature metrology, Cryogenics, External quantum efficiency, Ions

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Proceedings Article | 18 February 2010 Paper

Spectroscopy of Yb-doped YLF crystals for laser cooling

S. Melgaard, D. Seletskiy, M. Sheik-Bahae, S. Bigotta, A. Di Lieto, M. Tonelli, R. Epstein

Proceedings Volume 7614, 761407 (2010) https://doi.org/10.1117/12.845045

KEYWORDS: Crystals, Absorption, Laser crystals, Luminescence, Gallium arsenide, Spectroscopy, Temperature metrology, Laser applications, Liquid crystals, Ytterbium

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Proceedings Article | 18 February 2010 Paper

Optical refrigeration breaks the Peltier barrier: cooling Yb:YLF to 155K

Denis Seletskiy, Seth Melgaard, Mansoor Sheik-Bahae, Stefano Bigotta, Alberto DiLieto, Mauro Tonelli, Richard Epstein

Proceedings Volume 7614, 761403 (2010) https://doi.org/10.1117/12.845049

KEYWORDS: Absorption, Crystals, Solids, Luminescence, Ytterbium, Cryogenics, Spectroscopy, Glasses, Cryocoolers, Energy efficiency

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Proceedings Article | 12 February 2009 Paper

Synthesis and evaluation of ultra-pure rare-earth-doped glass for laser refrigeration

Wendy Patterson, Markus Hehlen, Mansoor Sheik-Bahae, Richard Epstein

Proceedings Volume 7228, 72280C (2009) https://doi.org/10.1117/12.811914

KEYWORDS: Luminescence, Glasses, Temperature metrology, Thermometry, Laser glasses, Data acquisition, Error analysis, Spectroscopy, Linear filtering, Ytterbium

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Proceedings Article | 10 February 2009 Paper

Fast differential luminescence thermometry

Denis Seletskiy, Michael Hasselbeck, Mansoor Sheik-Bahae, Richard Epstein

Proceedings Volume 7228, 72280K (2009) https://doi.org/10.1117/12.810856

KEYWORDS: Luminescence, Temperature metrology, Gallium arsenide, Solids, Thermometry, Crystals, Calibration, Monochromators, Signal detection, Fluorine

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Proceedings Article | 10 February 2009 Paper

Recent progress in laser cooling via resonant cavity

Denis Seletskiy, Seth Melgaard, Michael Hasselbeck, Mansoor Sheik-Bahae, Richard Epstein, Stefano Bigotta, Mauro Tonelli

Proceedings Volume 7228, 72280F (2009) https://doi.org/10.1117/12.810861

KEYWORDS: Absorption, Temperature metrology, Solids, Crystals, Mirrors, Cryocoolers, Statistical analysis, Absorbance, Reflectivity, Quantum efficiency

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Proceedings Article | 10 February 2009 Paper

MBE growth and characterization of semiconductor laser coolers

Andreas Stintz, Chia-Yeh Li, Mansoor Sheik-Bahae, Kevin Malloy

Proceedings Volume 7228, 722803 (2009) https://doi.org/10.1117/12.808325

KEYWORDS: Gallium arsenide, Indium gallium phosphide, Crystals, Semiconductor lasers, Luminescence, Interfaces, Phosphorus, Semiconductors, Heterojunctions, Gallium

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Proceedings Article | 12 February 2008 Paper

Nanogap experiments for laser cooling

Andreas Stintz, Richard Epstein, Mansoor Sheik-Bahae, Kevin Malloy, Michael Hasselbeck, Stephen Boyd

Proceedings Volume 6907, 690709 (2008) https://doi.org/10.1117/12.761962

KEYWORDS: Gallium arsenide, Etching, Quantum wells, Semiconductor lasers, Photoresist materials, Reflection, Crystals, HF etching, Convection, Gallium

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Proceedings Article | 11 February 2008 Paper

Synthesis of ultrapure ZBLAN glass for laser refrigeration

Markus Hehlen, Richard Epstein, Wendy Patterson

Proceedings Volume 6907, 69070A (2008) https://doi.org/10.1117/12.762146

KEYWORDS: Glasses, Metals, Ions, ZBLAN, Zirconium, Crystals, Iron, Oxides, Laser glasses, Particles

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Proceedings Article | 11 February 2008 Paper

Cooling of Yb:YLF using cavity enhanced resonant absorption

D. Seletskiy, M. Hasselbeck, M. Sheik-Bahae, R. Epstein, S. Bigotta, M. Tonelli

Proceedings Volume 6907, 69070B (2008) https://doi.org/10.1117/12.759152

KEYWORDS: Absorption, Luminescence, Temperature metrology, Mirrors, Reflectivity, Crystals, Solids, Thermometry, Cryogenics, Sensors

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Proceedings Article | 4 February 2008 Paper

Computer modeling and analysis of thermal link performance for an optical refrigerator

Kevin Byram, David Mar, John Parker, Steven Von der Porten, John Hankinson, Chris Lee, Kai Mayeda, Richard Haskell, Qimin Yang, Scott Greenfield, Richard Epstein

Proceedings Volume 6907, 69070C (2008) https://doi.org/10.1117/12.764287

KEYWORDS: Thermography, Thermal modeling, Photons, Transmittance, Optical fibers, Waveguides, Mirrors, Absorption, Optical components, Systems modeling

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Proceedings Article | 4 February 2008 Paper

Designs and optical tests of thermal links for an optical refrigerator

John Parker, David Mar, Steven Von der Porten, John Hankinson, Kevin Byram, Chris Lee, Kai Mayeda, Richard Haskell, Qimin Yang, Scott Greenfield, Richard Epstein

Proceedings Volume 6907, 69070D (2008) https://doi.org/10.1117/12.764166

KEYWORDS: Mirrors, Thermography, Dielectric mirrors, Light, Absorption, Interfaces, Reflectivity, Glasses, Chemical elements, Light scattering

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Proceedings Article | 15 March 2007 Paper

Heterostructure design optimization for laser cooling of GaAs

B. Imangholi, C. Wang, E. Soto, M. Sheik-Bahae, A. Stintz, K. Malloy, N. Nuntawong, R. Epstein

Proceedings Volume 6461, 64610G (2007) https://doi.org/10.1117/12.709847

KEYWORDS: Gallium arsenide, Heterojunctions, Luminescence, External quantum efficiency, Absorption, Electrons, Semiconductor lasers, Indium gallium phosphide, Photons, Diffusion

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Proceedings Article | 7 March 2007 Paper

Ultrapure ZBLAN glass for optical refrigerators

Markus Hehlen, Richard Epstein

Proceedings Volume 6461, 646103 (2007) https://doi.org/10.1117/12.708304

KEYWORDS: Ytterbium, Absorption, Solids, Ions, Luminescence, ZBLAN, Glasses, Energy transfer, Copper, Iron

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Proceedings Article | 7 March 2007 Paper

Laser cooling using cavity enhanced pump absorption

D. Seletskiy, M. Hasselbeck, M. Sheik-Bahae, R. Epstein

Proceedings Volume 6461, 646104 (2007) https://doi.org/10.1117/12.709788

KEYWORDS: Absorption, Reflectivity, Mirrors, Ytterbium, Fabry–Perot interferometers, Solids, Ions, Luminescence, Feedback loops, Sensors

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Proceedings Article | 7 March 2007 Paper

Nanogap experiments for laser cooling: a progress report

Ryan Martin, Josef Velten, Andreas Stintz, Kevin Malloy, Richard Epstein, Mansoor Sheik-Bahae, Michael Hasselbeck, Babak Imangholi, S. Boyd, Todd Bauer

Proceedings Volume 6461, 64610H (2007) https://doi.org/10.1117/12.708585

KEYWORDS: Silicon, Etching, Amorphous silicon, Scanning electron microscopy, Semiconducting wafers, Semiconductor lasers, Silicon films, Oxides, Plasma enhanced chemical vapor deposition, Semiconductors

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Proceedings Article | 7 March 2007 Paper

Effect of high carrier density on luminescence thermometry in semiconductors

Michael Hasselbeck, Mansoor Sheik-Bahae, Richard Epstein

Proceedings Volume 6461, 646107 (2007) https://doi.org/10.1117/12.709973

KEYWORDS: Luminescence, Excitons, Quantum wells, Semiconductors, Semiconductor lasers, Gallium arsenide, Thermometry, Absorption, 3D modeling, Temperature metrology

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Proceedings Article | 21 March 2006 Paper

Cavity enhanced resonant absorption with application for laser cooling

D. Seletskiy, M. Hasselbeck, M. Sheik-Bahae, J. Thiede, R. Epstein

Proceedings Volume 6130, 61300P (2006) https://doi.org/10.1117/12.644834

KEYWORDS: Absorption, Reflectivity, Mirrors, Photons, Luminescence, Ytterbium, Solids, Glasses, Optical resonators, Ions

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Proceedings Article | 21 March 2006 Paper

Laser cooling of rare-earth doped solids: the next step

Markus Hehlen, Richard Epstein, Hiroyuki Inoue

Proceedings Volume 6130, 61300N (2006) https://doi.org/10.1117/12.663663

KEYWORDS: Ytterbium, Ions, Absorption, ZBLAN, Solids, Iron, Copper, Cryocoolers, Transition metals, Energy transfer

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Proceedings Article | 28 February 2006 Paper

Advances in laser cooling of semiconductors

M. Sheik-Bahae, B. Imangholi, M. Hasselbeck, R. Epstein, S. Kurtz

Proceedings Volume 6115, 611518 (2006) https://doi.org/10.1117/12.644915

KEYWORDS: Luminescence, Absorption, Semiconductors, Semiconductor lasers, Heterojunctions, Gallium arsenide, External quantum efficiency, Temperature metrology, Zinc, Excitons

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Proceedings Article | 28 February 2006 Paper

Differential luminescence thermometry in semiconductor laser cooling

Babak Imangholi, Michael Hasselbeck, Daniel Bender, Chengao Wang, Mansoor Sheik-Bahae, Richard Epstein, Sarah Kurtz

Proceedings Volume 6115, 61151C (2006) https://doi.org/10.1117/12.646346

KEYWORDS: Luminescence, Gallium arsenide, External quantum efficiency, Temperature metrology, Semiconductors, Heterojunctions, Semiconductor lasers, Spectroscopy, Thermometry, Solids

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Proceedings Article | 4 November 2004 Paper

Laser cooling of infrared sensors

Michael Hasselbeck, Mansoor Sheik-Bahae, Jared Thiede, James Distel, Scott Greenfield, Wendy Patterson, Stefano Bigotta, Babak Imangholi, Denis Seletskiy, Daniel Bender, Venkatesh Vankipuram, Nima Vadiee, Richard Epstein

Proceedings Volume 5543, (2004) https://doi.org/10.1117/12.561738

KEYWORDS: Luminescence, Semiconductors, Semiconductor lasers, Glasses, Absorption, Photons, Gallium arsenide, Electrons, Infrared sensors, Solids

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Showing 5 of 37 publications

Proceedings Volume Editor (17)

SPIE Conference Volume | 23 March 2020

Photonic Heat Engines: Science and Applications II

SPIE Conference Volume | 7 June 2019

Photonic Heat Engines: Science and Applications

SPIE Conference Volume | 13 June 2018

Tri-Technology Device Refrigeration (TTDR) III

SPIE Conference Volume | 13 June 2018

Optical and Electronic Cooling of Solids III

SPIE Conference Volume | 29 June 2017

Tri-Technology Device Refrigeration (TTDR) II

Showing 5 of 17 publications

Conference Committee Involvement (23)

Photonic Heat Engines: Science and Applications VII

29 January 2025 | San Francisco, California, United States

Photonic Heat Engines: Science and Applications VI

31 January 2024 | San Francisco, California, United States

Photonic Heat Engines: Science and Applications V

1 February 2023 | San Francisco, California, United States

Photonic Heat Engines: Science and Applications IV

27 January 2022 | San Francisco, California, United States

Photonic Heat Engines: Science and Applications III

6 March 2021 | Online Only, California, United States

Photonic Heat Engines: Science and Applications II

5 February 2020 | San Francisco, California, United States

Photonic Heat Engines: Science and Applications

3 February 2019 | San Francisco, California, United States

Tri-Technology Device Refrigeration (TTDR) III

18 April 2018 | Orlando, FL, United States

Optical and Electronic Cooling of Solids III

30 January 2018 | San Francisco, California, United States

Tri-Technology Device Refrigeration (TTDR) II

11 April 2017 | Anaheim, CA, United States

Optical and Electronic Cooling of Solids II

1 February 2017 | San Francisco, California, United States

Tri-Technology Device Refrigeration (TTDR)

19 April 2016 | Baltimore, MD, United States

Optical and Electronic Cooling of Solids

17 February 2016 | San Francisco, California, United States

Laser Refrigeration of Solids VIII

11 February 2015 | San Francisco, California, United States

Laser Refrigeration of Solids VII

5 February 2014 | San Francisco, California, United States

Laser Refrigeration of Solids VI

6 February 2013 | San Francisco, California, United States

Laser Refrigeration of Solids V

25 January 2012 | San Francisco, California, United States

Laser Refrigeration of Solids IV

27 January 2011 | San Francisco, California, United States

Laser Refrigeration of Solids III

28 January 2010 | San Francisco, California, United States

Laser Refrigeration of Solids II

29 January 2009 | San Jose, California, United States

Laser Refrigeration of Solids

23 January 2008 | San Jose, California, United States

Laser Cooling of Solids

24 January 2007 | San Jose, California, United States

Advanced Optical and Quantum Memories and Computing IV

24 January 2007 | San Jose, California, United States

Showing 5 of 23 Conference Committees

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