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[Spatial localized distribution of modes in two-dimension random medium].

Ke Yao1, Guo-Ying Feng, Li-Ling Yang

  • 1College of Electronic Information of Sichuan University, Chengdu 610065, China. scu.keyao@gmail.com

Guang Pu Xue Yu Guang Pu Fen Xi = Guang Pu
|January 5, 2013
PubMed
Summary

This study used the finite-difference time-domain (FDTD) algorithm to analyze random laser media. Results show spatial variations in emission spectra and pumping efficiency, aiding in pseudo-random medium preparation.

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Area of Science:

  • Computational physics
  • Optics and photonics
  • Materials science

Context:

  • Numerical simulation of complex optical media is crucial for understanding light-matter interactions.
  • Random media present unique challenges due to their disordered structures.
  • The finite-difference time-domain (FDTD) algorithm offers a robust method for solving Maxwell's equations.

Purpose:

  • To numerically solve Maxwell's and rate equations for a two-dimensional random medium using the FDTD algorithm.
  • To investigate the spatial distribution of emission spectra and pumping efficiency under varying excitation conditions.
  • To analyze the dependence of random distribution on lasing properties.

Summary:

  • The FDTD algorithm was employed to simulate a 2D random medium, yielding emission spectra for different regions and pumping intensities.
  • Calculations revealed significant spatial variations in emission energy distribution and pumping efficiency across the random medium.
  • The spatial extent overlap of modes was successfully reproduced, validating the simulation approach.

Impact:

  • Provides insights into the influence of random structures on laser emission characteristics.
  • Demonstrates the utility of the FDTD method for analyzing pseudo-random laser media.
  • Offers guidance for the design and preparation of novel random laser materials with tailored properties.