Transmission and reflection spectra of a photonic crystal with a Raman defects


Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.1134/S1063776110120022

Ключевые слова: Group velocities, High frequency HF, Microwatts, Nonlinear refractive index, One dimensional photonic crystal, Probe field, Pump intensities, Raman gain, Raman resonances, Reflection spectra, Spectral position, Three level atoms, Transmission spectrums, Defects, Dispersion (waves), Probes, Pumping (laser), Pumps, Refractive index, Resonance, Photonic crystals

Аннотация: Features of Raman gain of probe radiation in three-level atoms placed in a defect of a one-dimensional photonic crystal in the presence of laser radiation (pump) at an adjacent high-frequency transition have been theoretically investigated. It has been shown that there is a pump intensity range where narrow peaks (resonances) simulПоказать полностьюtaneously appear in the transmission and reflection spectra of the probe field. Beyond this region, the peak in the transmission spectrum is transformed to a narrow dip. The spectral position of these peaks is determined by the Raman resonance and the transmittance and reflectance can be larger than unity at pump intensities from several microwatts per square centimeter to several tens of milliwatts per square centimeter. The nature of narrow peaks is due to a sharp dispersion of a nonlinear refractive index near the Raman resonance; this dispersion is responsible for a strong decrease in the group velocity of probe radiation. The proposed scheme makes it possible to obtain controlled ultranarrow resonances in the transmission and reflection spectra of the photonic crystal.

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Выпуск журнала: Vol. 111, Is. 6

Номера страниц: 898-906

ISSN журнала: 10637761

Место издания: NEW YORK



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