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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 18 — Sep. 9, 2013
  • pp: 20880–20887

Compact polarizing beam splitter based on a metal-insulator-metal inserted into multimode interference coupler

Vuthy Chheang, Tae-Kyeong Lee, Geum-Yoon Oh, Hong-Seung Kim, Byeong-Hyeon Lee, Doo Gun Kim, and Young-Wan Choi  »View Author Affiliations


Optics Express, Vol. 21, Issue 18, pp. 20880-20887 (2013)
http://dx.doi.org/10.1364/OE.21.020880


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Abstract

We propose and analyze a compact polarizing beam splitter (PBS) based on a metal-insulator-metal (MIM) structure inserted into a multimode interference coupler (MMI). Owing to the MIM structure, the TE polarized state is reflected by the cut-off condition while the TM polarized state is transmitted by the surface plasmon polariton, and the two polarized states can thus be separated. In this paper, the dependence of the reflected TE and transmitted TM field intensities on the MIM length and the gap thickness has been studied systematically. The proposed PBS structure, with a total size of 4 × 0.7 × 44 µm3 is designed with MIM length, gap thickness, and metal thickness of 0.6 µm, 0.5 µm, and 0.05 µm, respectively. In the designed PBS, the transmittance for the TM polarized light, reflectance for the TE polarized light, extinction ratio, and insertion losses of the TE and TM modes are obtained using a 3D finite-difference time-domain method to be 0.9, 0.88, 12.55 dB, and 1.1 dB and 0.9 dB, respectively. The designed PBS has a much shorter length, 44 µm, compared to previous PBS devices.

© 2013 OSA

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.3120) Optical devices : Integrated optics devices
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optical Devices

History
Original Manuscript: July 1, 2013
Revised Manuscript: August 23, 2013
Manuscript Accepted: August 25, 2013
Published: August 29, 2013

Citation
Vuthy Chheang, Tae-Kyeong Lee, Geum-Yoon Oh, Hong-Seung Kim, Byeong-Hyeon Lee, Doo Gun Kim, and Young-Wan Choi, "Compact polarizing beam splitter based on a metal-insulator-metal inserted into multimode interference coupler," Opt. Express 21, 20880-20887 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-18-20880


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