Rupper G, Kwong N H, Binder R
College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA.
Phys Rev Lett. 2006 Sep 15;97(11):117401. doi: 10.1103/PhysRevLett.97.117401. Epub 2006 Sep 11.
We present a theoretical analysis for laser cooling of bulk GaAs based on a microscopic many-particle theory of absorption and luminescence of a partially ionized electron-hole plasma. Our cooling threshold analysis shows that, at low temperatures, the presence of the excitonic resonance in the luminescence is essential in competing against heating losses. The theory includes self-consistent energy renormalizations and line broadenings from both instantaneous mean-field and frequency-dependent carrier-carrier correlations, and it is applicable from the few-Kelvin regime to above room temperature.
我们基于部分电离的电子 - 空穴等离子体吸收和发光的微观多粒子理论，对块状砷化镓的激光冷却进行了理论分析。我们的冷却阈值分析表明，在低温下，发光中激子共振的存在对于对抗加热损耗至关重要。该理论包括来自瞬时平均场和频率相关的载流子 - 载流子相关性的自洽能量重整化和线宽展宽，并且适用于从几开尔文到室温以上的温度范围。
