Coupled Microcavities in Light-Emitting Porous Silicon

Although porous silicon (p-Si) can be easily, rapidly, and cheaply produced in electrochemical cells without the need for lithographic or epitaxial techniques, the emitted light has an undesirably broad spectrum (FWHM ~150 nm) and long (microsecond) decay times.1 If the spectrum can be narrowed, the response time reduced, and the efficiency improved, p-Si light emitters are likely to rapidly find their way into advanced Si-based optoelectronic chips.

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