摘要:

A bulk photovoltaic effect has been observed in a ferroelectric polymer, polyvinylidene fluoride. Permanent photocurrents and photovoltages are generated by incident light in the visible region without application of any external electric field. The results are interpreted according to theory developed for similar effects found in ferroelectric and pyroelectric single crystals and ceramics.

ISSN:0003-6951    

DOI:10.1063/1.95444

出版商:AIP    

年代:1984

数据来源: AIP

摘要:

Infrared laser induced desorption (LID) has been demonstrated for water and other contaminants on nominally transparent substrates. For the samples measured to date, the LID is defect dominated for both small (120 &mgr;m) and large (380 &mgr;m) spot sizes. For the larger spot sizes, the data for multiple irradiations of the same site (N/1) can be explained using a simple defect model. The surface damage threshold of these materials correlates with the measured LID fluence, i.e., samples and sites with high contaminant fluences damage at low thresholds. Laser cleaned surfaces of CaF2, BaF2, and NaCl which were dosed with H2O at approximately −100 °C showed no evidence of readsorbed water on subsequent LID testing, indicating a passivation of the surface.

ISSN:0003-6951    

DOI:10.1063/1.95445

出版商:AIP    

年代:1984

数据来源: AIP