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Amplified spontaneous emission over the XeF(D+X) transition in solid Kr H. Kunttu, W. G. Lawrence, and V. A. Apkariar?)
 

Summary: Amplified spontaneous emission over the XeF(D+X) transition in solid Kr
H. Kunttu, W. G. Lawrence, and V. A. Apkariar?)
Department of Chemistry, Institute for Surface atid Interface.Science, University of California, Irvine,
California 92 717
(Received 20 July 1990; accepted 17 October 1990)
XeF doped solid Kr represents a novel solid state exciplex laser. A net gain in excess of 100
cm 'and a superradiant,beam of 5 mrad divergence are observed over the XeF(D+X)
transition at 301 nm, when free standing crystals of XeF doped Kr are optically pumped near
the XeF(D+X) absorption maximum at 260 nm. Superlinear dependence of gain on pump
intensity and low divergence of the amplified beam are taken as evidence for self-focusing. The
XeF(D) state is effectively isolated from the lower manifold of charge transfer states in solid
Kr, which includes XeF(B,C) and (KrXe) +F'-.
I. INTRODUCTION
Solid state rare gas halide exciplexes represent a novel
family of lasers. High energy density, high efficiency, broad
tunability, low pump thresholds are among the attributes of
solid state rare gas halide exciplexes, The first example of
such a laser was demonstrated in a free standing crystal of
argon doped with XeF, in which laser action over both
XeF(B-+X) and XeF(C-+ii) transitions were reported.'

  

Source: Apkarian, V. Ara - Department of Chemistry, University of California, Irvine

 

Collections: Chemistry