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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 27 — Dec. 17, 2012
  • pp: 28025–28032

Optics InfoBase > Optics Express > Volume 20 > Issue 27 > Page 28025

A four-port plasmonic quasi-circulator based on metal-insulator-metal waveguides

Kunhua Wen, Lianshan Yan, Wei Pan, Bin Luo, Zhen Guo, and Yinghui Guo  »View Author Affiliations


Optics Express, Vol. 20, Issue 27, pp. 28025-28032 (2012)
http://dx.doi.org/10.1364/OE.20.028025


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Abstract

A metal-insulator-metal (MIM)-based four-port quasi-circulator consisting of four bus waveguides and eight narrow inside/outside slits is proposed without using nonreciprocity. Once the input port is defined, only a specific output port could be obtained by proper the design of parameters of the waveguides and slits. Simulation results based on finite-different time-domain (FDTD) method demonstrate that the transmittance at the center wavelength of the appropriate output port can reach 0.63 while those of the other two output ports are lower than 0.06. Through adjusting the slits spacing or optimizing the insulator material in the slits, the isolation of the circulator could be further improved with a slight sacrifice of the transmission. Such structure could also be used for wavelength demultiplexing with the center wavelength determined by the length of the bus waveguides and slits.

© 2012 OSA

OCIS Codes
(230.7380) Optical devices : Waveguides, channeled
(240.6680) Optics at surfaces : Surface plasmons
(250.3750) Optoelectronics : Optical logic devices

ToC Category:
Optics at Surfaces

History
Original Manuscript: September 25, 2012
Revised Manuscript: November 16, 2012
Manuscript Accepted: November 19, 2012
Published: December 3, 2012

Citation
Kunhua Wen, Lianshan Yan, Wei Pan, Bin Luo, Zhen Guo, and Yinghui Guo, "A four-port plasmonic quasi-circulator based on metal-insulator-metal waveguides," Opt. Express 20, 28025-28032 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-27-28025


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