Photorefractive chiral smectic A phases
| Autor: | B. C. De Simone, Attilio Golemme, Roberto Termine |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Materials science
Physics and Astronomy (miscellaneous) Condensed matter physics business.industry Physics::Optics Mesophase Field dependence Photorefractive effect Optical storage Grating Organic photorefractive materials Condensed Matter::Soft Condensed Matter Liquid crystal Phase (matter) Optoelectronics business |
| Zdroj: | Applied Physics Letters. 78:688-690 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.1345824 |
| Popis: | We present results of the photorefractive properties of a chiral smectic A liquid-crystalline phase. In our approach, the mesophase is sandwiched between two photoconducting layers. In contrast to the effect due to the dielectric anisotropy typical of nematic phases, the refractive-index modulation is due to the electroclinic effect. We measured the grating spacing and the field dependence of the gain coefficient and obtained a net two-beam coupling gain of 600 cm−1 at 35 V/μm. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|