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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 5 — Feb. 10, 2013
  • pp: 1049–1053

Polarization-independent high-index contrast grating and its fabrication tolerances

Kazuhiro Ikeda, Kazuma Takeuchi, Kentaro Takayose, Il-Sug Chung, Jesper Mørk, and Hitoshi Kawaguchi  »View Author Affiliations


Applied Optics, Vol. 52, Issue 5, pp. 1049-1053 (2013)
http://dx.doi.org/10.1364/AO.52.001049


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Abstract

A polarization-independent, high-index contrast grating (HCG) with a single layer of cross stripes allowing simple fabrication is proposed. Since the cross stripes structure can be suspended in air by selectively wet-etching the layer below, all the layers can be grown at once when implemented for vertical-cavity surface-emitting lasers. We optimized the structure to have a broad and high reflectivity band centered at around 1 μm using a finite difference time domain method, and obtained an 80 nm high reflectivity band centered at 0.97 μm in which the reflectivity exceeded 99.5%. We also investigated the fabrication tolerances of the structure and found that, assuming careful optimizations of electron beam lithography for the precise grating width and dry-etching for the vertical sidewall, the suggested polarization-independent HCG can be fabricated using standard technologies.

© 2013 Optical Society of America

OCIS Codes
(230.1950) Optical devices : Diffraction gratings
(230.4040) Optical devices : Mirrors
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Optical Devices

History
Original Manuscript: October 19, 2012
Revised Manuscript: January 3, 2013
Manuscript Accepted: January 5, 2013
Published: February 8, 2013

Citation
Kazuhiro Ikeda, Kazuma Takeuchi, Kentaro Takayose, Il-Sug Chung, Jesper Mørk, and Hitoshi Kawaguchi, "Polarization-independent high-index contrast grating and its fabrication tolerances," Appl. Opt. 52, 1049-1053 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-5-1049


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