4 November 2004 Laser cooling of semiconductors using three-photon excitation
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An energy-balance equation for excited carriers and phonons is established for studying the laser cooling of wide-bandgap semiconductors using three-photon excitation process. The power-exchange densities of the system are calculated for different strengths of the excitation filed. When the power-exchange density is positive, it implies laser cooling of the lattice. The effects of initial lattice temperature and field-frequency detuning on the laser-cooling phenomenon under the three-photon excitation process is demonstrated. The power-exchange densities are compared for both laser cooling and heating using nonlinear excitation.
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Tzveta Apostolova, Danhong Huang, Paul M. Alsing, David A. Cardimona, "Laser cooling of semiconductors using three-photon excitation", Proc. SPIE 5543, Infrared Spaceborne Remote Sensing XII, (4 November 2004); doi: 10.1117/12.561443; https://doi.org/10.1117/12.561443

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