Defective photonic crystals with greatly enhanced second-harmonic generation

Abstract

A one-dimensional defective photonic crystal structure is proposed with the aim of studying its nonlinear optical properties. In such a structure, extremely enhanced second-harmonic generation with an efficiency ~5 orders of magnitude higher than that of ordinary films is demonstrated in a numerical simulation. Extraordinary phase conditions of the process in such a structure were explored, and efficient forward and backward second-harmonic generation could be achieved simultaneously. The mechanism of the enhancement is the high field intensity and efficient wave coupling introduced by light localization in defect states, from which many other nonlinear processes can also benefit.

Nonlinear Propagation of ElectromagneticWaves in Antiferromagnet

“…This localization effect has been applied to the SHG from a traditional nonlinear film embedded in one-dimension photonic crystals (Ren, et. Al., 2004 ;Si, et. al., 2001 ;Zhu, et.al., 2008, Wang, F., et.…”

Time domain bidirectional beam propagation method for second harmonic generation in multilayers

“…Device #2 exploits the high density of optical modes of the multilayer with defect: the pump is tuned up to the defect wavelength, whereas the SH is on a proper transmission resonance but it is not phase matched (Shi et al 2001). In Table 2 we report, for each device, the full width at half maximum (FWHM) of the transmission resonances at the FF and the SH, calculated through the linear time domain BiBPM.…”

Giant enhancement of second harmonic generation in one-dimensional defective nonlinear photonic crystals

“…The enhancement is ascribed to the combination of high electromagnetic mode density of states and a slowing down of the optical waves at frequency near the photonic band gap (PBG) [1] and PBG edge [4] and also is to introduce resonant cavities to achieve better field confinement and enhancement [9][10][11][12].…”