A.F. Ioffe Physicotech. Inst., Acad. of Sci., St. Petersburg, Russia

Conference: 23rd International Conference on the Physics of Semiconductors

Part: vol.4 , Page: 3127-30 vol.4

Editor: Scheffler, M.; Zimmermann, R.

Publisher: World Scientific , Singapore , 1996 , 4 vol. (xxxviii+xxvii+xxx+xxvi+3460) Pages

Abstract: The symmetry and orientation of photonic lattice of 3D ordered silica matrices (synthetic opals) are determined by the analysis of transmission electron microscopy images, By optical transmission measurements the photonic band edges are mapped out at points L and K of Brillouin zone. It is shown that the modulation of refractive index of opal pores by their filling with liquids results in variation of light attenuation length within the forbidden gap. To increase the refractive index contrast of the lattice the pores of opals were filled with CdS. The dramatic decrease of attenuation length is observed for opal/CdS. The parameters of photonic lattice required to reach the prominent depletion of photonic density of states (so-called "pseudo-gap") in opals are estimated. (4 References)