Variable-angle reflectance performed on macroporous silicon photonic crystals yields the dispersion of two-dimensional photonic bands. A comparison with calculated optical spectra identifies the spectral structures, which mark the onset of a propagating photonic mode, as one-dimensional critical points. The experimental results agree with theoretical determinations of the reflectance and of the photonic-band dispersion in a wide energy range. A symmetry analysis yields the selection rules for excitation of photonic modes, which can be treated like elementary excitations of the crystal.
Spectroscopy of photonic bands in macroporous silicon photonic crystals
GALLI, MATTEO;AGIO, MARIO;ANDREANI, LUCIO;BELOTTI, MICHELE;GUIZZETTI, GIORGIO;MARABELLI, FRANCO;PATRINI, MADDALENA;
2002-01-01
Abstract
Variable-angle reflectance performed on macroporous silicon photonic crystals yields the dispersion of two-dimensional photonic bands. A comparison with calculated optical spectra identifies the spectral structures, which mark the onset of a propagating photonic mode, as one-dimensional critical points. The experimental results agree with theoretical determinations of the reflectance and of the photonic-band dispersion in a wide energy range. A symmetry analysis yields the selection rules for excitation of photonic modes, which can be treated like elementary excitations of the crystal.File in questo prodotto:
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