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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 16 — Aug. 2, 2010
  • pp: 17220–17238

Multi-level multi-thermal-electron FDTD simulation of plasmonic interaction with semiconducting gain media: applications to plasmonic amplifiers and nano-lasers

X. Chen, B. Bhola, Y. Huang, and S. T. Ho  »View Author Affiliations

Optics Express, Vol. 18, Issue 16, pp. 17220-17238 (2010)

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Interactions between a semiconducting gain medium and confined plasmon-polaritons are studied using a multilevel multi-thermal-electron finite-difference time-domain (MLMTE-FDTD) simulator. We investigated the amplification of wave propagating in a plasmonic metal-semiconductor-metal (MSM) waveguide filled with semiconductor gain medium and obtained the conditions required to achieve net optical gain. The MSM gain waveguide is used to form a plasmonic semiconductor nano-ring laser(PSNRL) with an effective mode volume of 0.0071μm3, which is about an order of magnitude smaller than the smallest demonstrated integrated photonic crystal based laser cavities. The simulation shows a lasing threshold current density of 1kA/cm2 for a 300nm outer diameter ring cavity with 80nm-wide ring. This current density can be realistically achieved in typical III-V semiconductor, which shows the experimental feasibility of the proposed PSNRL structure.

© 2010 OSA

OCIS Codes
(140.3560) Lasers and laser optics : Lasers, ring
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Lasers and Laser Optics

Original Manuscript: April 27, 2010
Revised Manuscript: June 20, 2010
Manuscript Accepted: June 24, 2010
Published: July 29, 2010

X. Chen, B. Bhola, Y. Huang, and S. T. Ho, "Multi-level multi-thermal-electron FDTD simulation of plasmonic interaction with semiconducting gain media: applications to plasmonic amplifiers and nano-lasers," Opt. Express 18, 17220-17238 (2010)

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  54. Energy density at the steady state in the cavity is determined by: η=0.5⋅∫S(ε(r¯)⋅|E(r¯)|2+μ(r¯)⋅|H(r¯)|2)⋅dr¯(S is the area of the lasing cavity).
  55. The area of lasing cavity is calculated by:S=π⋅(dOD/ 2)2−(dID/2)2] = 5.48 × 10–10 cm2.

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