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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 13 — May. 1, 2012
  • pp: 2361–2366

Ultracompact 1×4 TM-polarized beam splitter based on photonic crystal surface mode

Bin Jiang, Yejin Zhang, Yufei Wang, Anjin Liu, and Wanhua Zheng  »View Author Affiliations


Applied Optics, Vol. 51, Issue 13, pp. 2361-2366 (2012)
http://dx.doi.org/10.1364/AO.51.002361


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Abstract

We provide an improved surface-mode photonic crystal (PhC) T-junction waveguide, combine it with an improved PhC bandgap T-junction waveguide, and then provide an ultracompact 1×4 TM-polarized beam splitter. The energy is split equally into the four output waveguides. The maximal transmission ratio of each output waveguide branch equals 24.7%, and the corresponding total transmission ratio of the ultracompact 1×4 beam splitter equals 98.8%. The normalized frequency of maximal transmission ratio is 0.397(2πc/a), and the bandwidth of the ultracompact 1×4 TM-polarized beam splitter is 0.0106(2πc/a). To the best of our knowledge, this is the first time such a high-efficiency 1×4 beam splitter exploiting the nonradiative surface mode as a guided mode has been proposed. Although we only employed a 1×4 beam splitter, our design can easily be extended to other 1×n beam splitters.

© 2012 Optical Society of America

OCIS Codes
(160.5293) Materials : Photonic bandgap materials
(050.5298) Diffraction and gratings : Photonic crystals
(160.5298) Materials : Photonic crystals

ToC Category:
Diffraction and Gratings

History
Original Manuscript: November 2, 2011
Revised Manuscript: February 9, 2012
Manuscript Accepted: February 11, 2012
Published: April 26, 2012

Citation
Bin Jiang, Yejin Zhang, Yufei Wang, Anjin Liu, and Wanhua Zheng, "Ultracompact 1×4 TM-polarized beam splitter based on photonic crystal surface mode," Appl. Opt. 51, 2361-2366 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-13-2361

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