Chinese Optics Letters, 2005, 3 (0s): 60, Published Online: Mar. 5, 2007
A new method for second harmonic generation Download: 512次
190.4360 Nonlinear optics, devices 230.7370 Waveguides 230.4320 Nonlinear optical devices 160.1190 Anisotropic optical materials
Abstract
We report a new method for second harmonic generation (SHG) by using centro-symmetric dielectric, of which 'chi'(2) is zero, rather than common nonlinear material. By designing the unique structure of centro-symmetric dielectric, which consists of two photonic crystals and several air waveguides, the efficient second-harmonic (SH) has obtained for the sharp enhancement of the electric quadrupole polarization. Based on finite difference time domain (FDTD) algorithm, the electromagnetic field distribution in the structure and the intensity of SH along the waveguide are analyzed. When the beam intensity of the pumping wave is 1.3 MW/mm2, the conversion efficiency of power is 0.307% for a photonic crystal waveguide with a length of 40 'mu'm.
Jianping Shi, Haiying Li, Xunan Chen, Haofei Shi, Changtao Wang, Chunlei Du. A new method for second harmonic generation[J]. Chinese Optics Letters, 2005, 3(0s): 60.