Enhancement of the SHG efficiency in a doubly resonant 2D-photonic crystal microcavity |
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Authors: | D Antonucci D de Ceglia A D’Orazio M De Sario V Marrocco V Petruzzelli F Prudenzano |
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Institution: | (1) Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari, Via E. Orabona 4, Bari, 70125, Italy;(2) Dipartimento di Ingegneria dell’Ambiente e per lo Sviluppo Sostenibile, Seconda Facoltà di Ingegneria, Via del Turismo 8, Taranto, 74100, Italy |
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Abstract: | In this paper we discuss the conditions to obtain the enhancement of second harmonic generation in a two-dimensional circular
photonic crystal AlGaAs cavity. The photonic crystal circular cavity offers the possibility of having high-Q resonance modes
with respect to those obtained with other types of photonic crystal lattices. The crystallographic cut of the AlGaAs provides
a strong nonlinear coupling between a transverse-magnetic (TM) polarized resonant mode at the fundamental wavelength and a
transverse-electric (TE) polarized resonant mode at second harmonic wavelength. The double resonance condition leads to a
strong improvement of the second harmonic generation process. A preliminary linear analysis has been performed by using the
finite-difference time-domain method, which includes the dispersive response of the material, modeled using the well-known
one-pole pair Lorentzian function. |
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Keywords: | Finite difference time domain (FDTD) Microcavity Second harmonic generation (SHG) Two-dimensional photonic crystals |
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