Numerical analysis of second harmonic generation for THz-wave in a photonic crystal waveguide using a nonlinear FDTD algorithm

Kyosuke Saito, Tadao Tanabe, Yutaka Oyama

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

We have presented a numerical analysis to describe the behavior of a second harmonic generation (SHG) in THz regime by taking into account for both linear and nonlinear optical susceptibility. We employed a nonlinear finite-difference-time-domain (nonlinear FDTD) method to simulate SHG output characteristics in THz photonic crystal waveguide based on semi insulating gallium phosphide crystal. Unique phase matching conditions originated from photonic band dispersions with low group velocity are appeared, resulting in SHG output characteristics. This numerical study provides spectral information of SHG output in THz PC waveguide. THz PC waveguides is one of the active nonlinear optical devices in THz regime, and nonlinear FDTD method is a powerful tool to design photonic nonlinear THz devices.

Original languageEnglish
Pages (from-to)164-167
Number of pages4
JournalOptics Communications
Volume365
DOIs
Publication statusPublished - 2016 Apr 15
Externally publishedYes

Keywords

  • Nonlinear optics
  • Photonic crystal waveguide
  • Second harmonic generation
  • Semiconductor waveguide
  • Terahertz wave

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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