Фотоиндуцированная периодическая структура (ПС) из наночастиц Ag, ее превращение в (ПС) из частиц AgI и связанный с этими ПС дихроизм

Анотація

In the waveguide composite film of AgCl-Ag which thickness corresponds to excitement of limited TE0 mode in AgCl layer, under the influence of linearly polarized (the direction of polarization of E0) laser beem  the periodic structure (PS) with the period of d=266 nm is received. Strokes of PS are formed by Ag nanoparticles and fixed on a substrate after removal of AgCl in fixing solution. Absorption spectra of PS absorption measured in the polarization E||, E0 give dichroism with the greatest size in near IR range. It is shown that PS from Ag easily turns into PS from AgI after processing by I2 vapor. It is revealed that despite the changes of morphology of PS after iodination its period and dichroism remain, but the maximum dichroism is observed already in near UV range.