Author/Authors :
Weiping Qin، نويسنده , , Shihua Huang، نويسنده , , Guotong Du، نويسنده , , Jishen Zhang، نويسنده , , Gejihu De، نويسنده , , Jishuang Zhang، نويسنده , , Yan Wang، نويسنده , , Chunyan Cao، نويسنده , , Shaoze Lu، نويسنده ,
Abstract :
A new model on the mechanism of anti-Stokes fluorescent cooling is proposed, based on which incident laser induces a phonon-assisted energy transfer from one luminescent center to another in an optical medium and causes medium cooling when the energy transfer is an anti-Stokes process and absorbs phonons. Here, we develop the model in two cases: two-phonon-assisted energy transfer for a small energy mismatch and one-phonon-assisted energy transfer for a large energy mismatch. The dependence of relative cooling efficiency on photon energy and temperature is also discussed in evaluating the new mechanism.
