Generation of the second optical harmonic in porous-silicon-based structures with a photonic band gapстатья
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Аннотация:Efficient generation of the second optical harmonic is observed experimentally in a multilayer periodic structure based on porous silicon. The second-harmonic signal is much stronger than the signal from a uniform porous silicon layer or from the single-crystal silicon substrate. The orientational dependence of the second-harmonic signal is isotropic. The second-harmonic intensity as a function of the reflection angle reaches a maximum in the direction corresponding to the minimum phase detuning in a multilayer periodic structure. (C) 1999 American Institute of Physics. [S0021-3640(99)00404-1].