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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 18 — Aug. 27, 2012
  • pp: 20659–20665

Efficient light coupling into in-plane semiconductor nanomembrane photonic devices utilizing a sub-wavelength grating coupler

Harish Subbaraman, Xiaochuan Xu, John Covey, and Ray T. Chen  »View Author Affiliations


Optics Express, Vol. 20, Issue 18, pp. 20659-20665 (2012)
http://dx.doi.org/10.1364/OE.20.020659


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Abstract

We report a subwavelength grating (SWG) coupler for coupling light efficiently into in-plane semiconductor nanomembrane photonic devices for the first time. The SWG coupler consists of a periodic array of rectangular trenches fabricated on a silicon nanomembrane (SiNM) transferred onto a glass substrate. At a wavelength of 1555.56 nm, the coupling efficiency of the fabricated 10 µm wide, 17.1 µm long SWG is 39.17% (−4.07 dB), with 1 dB and 3 dB bandwidths of 29 nm and 57 nm, respectively. Peak efficiency varies by 0.26 dB when measuring 5 fabricated grating pairs. Coupling efficiency can further be improved with an improved SiNM transfer process. Such high efficiency couplers allow for the successful realization of a plethora of hybrid photonic devices utilizing nanomembrane technology.

© 2012 OSA

OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(130.0130) Integrated optics : Integrated optics
(130.1750) Integrated optics : Components
(160.1245) Materials : Artificially engineered materials
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Integrated Optics

History
Original Manuscript: July 19, 2012
Revised Manuscript: August 20, 2012
Manuscript Accepted: August 20, 2012
Published: August 23, 2012

Citation
Harish Subbaraman, Xiaochuan Xu, John Covey, and Ray T. Chen, "Efficient light coupling into in-plane semiconductor nanomembrane photonic devices utilizing a sub-wavelength grating coupler," Opt. Express 20, 20659-20665 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-18-20659


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