Na原子中3S—4D双光子共振增强紫外相干辐射的观测和研究

用Na原子3S—4D双光子共振增强的受激超Raman散射、四波混频和光泵受激发射过程,获得230—340nm范围内两组紫外相干辐射,分析了这一系列紫外相干辐射的产生机制和谐线特性。     

STIMULATED EMISSION AND GAIN MEASUREMENTS IN InAsP/InP STRAINED-MULTIPLE-QUANTUM WELLS

We have studied the stimulated emission from InAsP/InP strained-multiple-quantum wells at room temperature. The stimulated emission spectra weave seen with three lobes, which are E_1H and E_1L transitions, and a tran-sitions from heavy hole initial states to localized interface states. The E_1H transitions exhibited different gain value from that of the transitions between the heavy hole and the interface states. With increasing excitation intensity, the gain of the interface peak appears to be saturated at lower excitation intensity. A method for identifying the inter face peak in the photoluminescene spectrum has been proposed.     

Hg蒸汽中通过双光子共振四波差频产生调谐真空紫外辐射

利用Hg原子6¹S₀—6¹D₂和6¹S₀—6³D₂双光子共振的四波差频(2ω₁—ω₃),获得了真空紫外相干辐射(ω₄)。当入射光之一(ω₃)波长调谐时,产生的真空紫外光也是调谐的,调谐范围为184.9-187.5nm.本文对非线性频率变换过程的机 关键词：