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.ppt ( قابل ویرایش و آماده پرینت )
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قسمتی از متن .ppt :
Laser Cooling in Semiconductors
Chengao Wang
Optical Science and Engineering,
Department of Physics & Astronomy, University of New Mexico
Historical Review
1929: The concept of laser cooling was established.
1960: Laser was invented.
1995: Laser cooling was first observed in ytterbium-doped glass.
????: Laser cooling in semiconductors is achieved.
Significance
Heating is a major problem in semiconductor devices.
Optical refrigerator using laser cooling will be free of vibration, mechanically robust and compact.
It has far reaching implications in the area of optical detection systems and optoelectronic devices.
Purpose
invent a practical all-solid-state optical refrigerator to cool semiconductors using laser cooling.
We hypothesize that laser cooling in semiconductors can achieve temperatures ~10K and below
پاورپوینت Laser Cooling in Semiconductors