LASER IMPLANTATION OF SODIUM NITRITE FERROELECTRIC INTO PORES OF SYNTHETIC OPAL

We present the experimental results on implantation of NaNO2 ferroelectric into pores of synthetic opal by illuminating with focused ultraviolet excimer-laser radiation of a sodium nitrite film located on the synthetic-opal surface. The reflection spectra of broadband radiation from the surface of implanted specimens are compared with the reflection spectra of initial (without any treatment) opals, synthetic opals filled with a saturated aqueous solution of sodium nitrite with subsequently evaporated solvent, and specimens with NaNO2 embedded as a melt. The possible mechanisms of shifts of reflected-and transmitted-radiation peaks are analyzed. Methods of implanting materials with high melting points into pores of 3D photonic crystals are proposed.