Enhancement of visible second-harmonic generation in epitaxial GaN-based two-dimensional photonic crystal structures

2004 ◽  
Vol 84 (8) ◽  
pp. 1245-1247 ◽  
Author(s):  
Gabriele Vecchi ◽  
Jérémi Torres ◽  
Dominique Coquillat ◽  
Marine Le Vassor d’Yerville ◽  
Andrea Marco Malvezzi
Keyword(s):  
Photonic Crystal ◽  
Second Harmonic Generation ◽  
Crystal Structures ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Two Dimensional ◽  
Dimensional Photonic Crystal ◽  
Two Dimensional Photonic Crystal

SECOND HARMONIC GENERATION IN TWO-DIMENSIONAL PHOTONIC CRYSTAL CONSISTING OF CENTRO-SYMMETRIC DIELECTRIC

2005 ◽  
Vol 19 (05) ◽  
pp. 869-878 ◽  
Author(s):  
JIANPING SHI ◽  
XIANZHONG CHEN ◽  
XUNAN CHEN ◽  
HANMIN YAO ◽  
GAIRONG YANG ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Photonic Crystal ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Finite Difference Time Domain ◽  
Second Harmonic ◽  
Electric Quadrupole ◽  
Waveguide Length ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time

We report optical second harmonic generation (OSHG) in a two dimension photonic crystal of centro-symmetric dielectric based on finite difference time domain (FDTD) algorithm. The electromagnetic field distribution in the structure and the intensity of second harmonic (SH) from electric quadrupole polarization along the waveguide are analyzed. The results show that the acute spatial variation of electromagnetic field results in the radiation of SH, and the intensity is proportional to the square of waveguide length. When the beam intensity of the pumping wave is 1.3 MW/mm2, which has wavelength of 10.6 μm, the conversion efficiency of power is 0.307% for a photonic crystal of Silicon with a length of 40 μm.

Effect of field modulation on the quasi-phase-matching for second harmonic generation in a two-dimensional nonlinear photonic crystal

2017 ◽  
Vol 31 (05) ◽  
pp. 1750025
Author(s):  
Li-Ming Zhao ◽  
Yun-Song Zhou ◽  
Ai-Hua Wang
Keyword(s):  
Photonic Crystal ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Phase Matching ◽  
Finite Width ◽  
Two Dimensional ◽  
Nonlinear Photonic Crystal ◽  
Quasi Phase Matching ◽  
Field Modulation

Second harmonic generation (SHG) in a two-dimensional (2D) nonlinear photonic crystal (NPC) with finite width along [Formula: see text]-direction that is embedded in air is investigated, without adopting the traditional approximations such as a plane-wave approximation (PWA) and slowly varying amplitude approximation (SVAA). The so-called quasi-phase-matching (QPM) and the corresponding SHG conversion efficiency can be modulated significantly by the field of fundamental wave (FW). It is assumed that the incident light, along [Formula: see text]-direction, is normally launched upon the surface of the sample, and QPM for different directions is investigated. It is found that the QPM shows significant differences, compared with the traditional QPM along the two different directions: in the direction of finite width of the sample, the peak value of SHG conversion efficiency is deviated from the traditional case and it gets to its peak values when the transmittance resonance occurs. However, in the other direction, the deviation from the traditional QPM arises from the field modulation of the second harmonic wave (SHW) and in this direction, it is investigated that the full width at half maximum of QPM is much wider than that in the direction of finite width of the sample. These results can be used to provide a theoretical guidance for achieving QPM SHG.

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