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Summary form only given. Photorefractivity of sol gel prepared silica films were confirmed from two-beam-coupling measurements, performed with a He-Ne cw laser at 633 nm without applied electric field. A strong absorption was present, however the relative energy transfer was +/- 10% on the weak beam, depending on the sample orientation.
Summary form only given. For the purpose of optical-limiting applications, we have studied, during the past few years, solid-state materials exhibiting a reverse saturation absorption (RSA) behavior. Our work mainly uses xerogels doped with phthalocyanines and HITCI molecules. To better determine the spectroscopic characteristics of the encaged dyes, we have extended our study of the RSA from the...
Summary form only given. In the search of all-solid-state tunable lasers in the visible, solid-state dye lasers are promising tools. Both polymer and xerogel can be host matrices for organic dyes. A lot of research has been done in order to improve the photostability and thermostability of the organic molecules encaged in the matrix by using new molecules such as pyrromethenes or perylenes. Also,...
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