The role of finite spatial beam profiles on photo-luminescence and laser cooling in GaAs structures

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

We present a microscopic many-body theory of optical refrigeration of semiconductors with finite spatial beam profile extension. The theory is an extension of our previous theory of optical refrigeration of GaAs, which had been limited to spatially homogeneous systems. In it, optically excited electron-hole pairs can be an unbound pairs, or pairs bound by the attractive Coulomb interaction (excitons). Assuming the electron-hole pairs to be in quasi-thermal equilibrium, our theory calculates its absorption and luminescence spectra within a diagrammatic (real-time) Green's function approach at the selg-consistent T-matrix level. The present extension to lateral spatial inhomogeneities due to finite beam spot size utilizes a photon transport equation which is based on a diagrammatic formulation of finite beam spot size utilizes a photon transport equation which is based on a for simplicity, and analytical solution for the pair density and power density rate equations is obtained, and numerical self-consistent solutions are presented. The result show that for typical beam waist parameters, lateral (radial) photon transport does not significantly impede the theoretically predicted cooling process.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7228
DOIs
StatePublished - 2009
EventLaser Refrigeration of Solids II - San Jose, CA, United States
Duration: Jan 28 2009Jan 29 2009

Other

OtherLaser Refrigeration of Solids II
CountryUnited States
CitySan Jose, CA
Period1/28/091/29/09

Fingerprint

Laser Cooling
Laser cooling
laser cooling
Photoluminescence
Gallium Arsenide
Photons
Refrigeration
photoluminescence
cooling
profiles
Photon
photons
Transport Equation
Electrons
Coulomb interactions
Lateral
Green's function
Excitons
time functions
Luminescence

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Rupper, G., Kwong, N-H., & Binder, R. (2009). The role of finite spatial beam profiles on photo-luminescence and laser cooling in GaAs structures. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7228). [722805] https://doi.org/10.1117/12.807882

The role of finite spatial beam profiles on photo-luminescence and laser cooling in GaAs structures. / Rupper, G.; Kwong, Nai-Hang; Binder, Rudolf.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7228 2009. 722805.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Rupper, G, Kwong, N-H & Binder, R 2009, The role of finite spatial beam profiles on photo-luminescence and laser cooling in GaAs structures. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7228, 722805, Laser Refrigeration of Solids II, San Jose, CA, United States, 1/28/09. https://doi.org/10.1117/12.807882
Rupper G, Kwong N-H, Binder R. The role of finite spatial beam profiles on photo-luminescence and laser cooling in GaAs structures. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7228. 2009. 722805 https://doi.org/10.1117/12.807882
Rupper, G. ; Kwong, Nai-Hang ; Binder, Rudolf. / The role of finite spatial beam profiles on photo-luminescence and laser cooling in GaAs structures. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7228 2009.
@inproceedings{c45213f4673443f293d64599ca2f6658,
title = "The role of finite spatial beam profiles on photo-luminescence and laser cooling in GaAs structures",
abstract = "We present a microscopic many-body theory of optical refrigeration of semiconductors with finite spatial beam profile extension. The theory is an extension of our previous theory of optical refrigeration of GaAs, which had been limited to spatially homogeneous systems. In it, optically excited electron-hole pairs can be an unbound pairs, or pairs bound by the attractive Coulomb interaction (excitons). Assuming the electron-hole pairs to be in quasi-thermal equilibrium, our theory calculates its absorption and luminescence spectra within a diagrammatic (real-time) Green's function approach at the selg-consistent T-matrix level. The present extension to lateral spatial inhomogeneities due to finite beam spot size utilizes a photon transport equation which is based on a diagrammatic formulation of finite beam spot size utilizes a photon transport equation which is based on a for simplicity, and analytical solution for the pair density and power density rate equations is obtained, and numerical self-consistent solutions are presented. The result show that for typical beam waist parameters, lateral (radial) photon transport does not significantly impede the theoretically predicted cooling process.",
author = "G. Rupper and Nai-Hang Kwong and Rudolf Binder",
year = "2009",
doi = "10.1117/12.807882",
language = "English (US)",
volume = "7228",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - The role of finite spatial beam profiles on photo-luminescence and laser cooling in GaAs structures

AU - Rupper, G.

AU - Kwong, Nai-Hang

AU - Binder, Rudolf

PY - 2009

Y1 - 2009

N2 - We present a microscopic many-body theory of optical refrigeration of semiconductors with finite spatial beam profile extension. The theory is an extension of our previous theory of optical refrigeration of GaAs, which had been limited to spatially homogeneous systems. In it, optically excited electron-hole pairs can be an unbound pairs, or pairs bound by the attractive Coulomb interaction (excitons). Assuming the electron-hole pairs to be in quasi-thermal equilibrium, our theory calculates its absorption and luminescence spectra within a diagrammatic (real-time) Green's function approach at the selg-consistent T-matrix level. The present extension to lateral spatial inhomogeneities due to finite beam spot size utilizes a photon transport equation which is based on a diagrammatic formulation of finite beam spot size utilizes a photon transport equation which is based on a for simplicity, and analytical solution for the pair density and power density rate equations is obtained, and numerical self-consistent solutions are presented. The result show that for typical beam waist parameters, lateral (radial) photon transport does not significantly impede the theoretically predicted cooling process.

AB - We present a microscopic many-body theory of optical refrigeration of semiconductors with finite spatial beam profile extension. The theory is an extension of our previous theory of optical refrigeration of GaAs, which had been limited to spatially homogeneous systems. In it, optically excited electron-hole pairs can be an unbound pairs, or pairs bound by the attractive Coulomb interaction (excitons). Assuming the electron-hole pairs to be in quasi-thermal equilibrium, our theory calculates its absorption and luminescence spectra within a diagrammatic (real-time) Green's function approach at the selg-consistent T-matrix level. The present extension to lateral spatial inhomogeneities due to finite beam spot size utilizes a photon transport equation which is based on a diagrammatic formulation of finite beam spot size utilizes a photon transport equation which is based on a for simplicity, and analytical solution for the pair density and power density rate equations is obtained, and numerical self-consistent solutions are presented. The result show that for typical beam waist parameters, lateral (radial) photon transport does not significantly impede the theoretically predicted cooling process.

UR - http://www.scopus.com/inward/record.url?scp=63449141644&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=63449141644&partnerID=8YFLogxK

U2 - 10.1117/12.807882

DO - 10.1117/12.807882

M3 - Conference contribution

VL - 7228

BT - Proceedings of SPIE - The International Society for Optical Engineering

ER -