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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 6 — Mar. 12, 2012
  • pp: 6365–6374

Enhanced in and out-coupling of InGaAs slab waveguides by periodic metal slit arrays

Seung Hyun Kim, Chung Min Lee, Seung Bo Sim, Jin hee Kim, Jang hee Choi, Won Seok Han, Kwang Jun Ahn, and Ki Ju Yee  »View Author Affiliations


Optics Express, Vol. 20, Issue 6, pp. 6365-6374 (2012)
http://dx.doi.org/10.1364/OE.20.006365


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Abstract

We studied the in- and the out-coupling efficiencies of photons with a thin InGaAs slab covered by periodic gold nano-slit arrays, by measuring transmission and photoluminescence (PL) spectra. While the maximum in-coupled photons into the InGaAs slab waveguide were found at dip positions in transmission spectra, the mostly out-coupled photons were observed as peaks in PL spectra. For different periods of slit arrays and incident angles we discussed spectral positions of transmission dips and efficiency of the in-coupling influenced by the absorption coefficient of InGaAs. In PL spectra we measured overall enhanced PL intensities from the InGaAs slab covered by slit arrays compared to that of a bare InGaAs, where the peak positions are determined by the period of slit arrays as well. Our findings are important for designing semiconductors both as an optically passive waveguide and active light emitter.

© 2012 OSA

OCIS Codes
(230.7400) Optical devices : Waveguides, slab
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 19, 2012
Revised Manuscript: February 18, 2012
Manuscript Accepted: February 26, 2012
Published: March 5, 2012

Citation
Seung Hyun Kim, Chung Min Lee, Seung Bo Sim, Jin hee Kim, Jang hee Choi, Won Seok Han, Kwang Jun Ahn, and Ki Ju Yee, "Enhanced in and out-coupling of InGaAs slab waveguides by periodic metal slit arrays," Opt. Express 20, 6365-6374 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-6-6365


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