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학술지 Enhanced in and Out-Coupling of InGaAs Slab Waveguides by Periodic Metal Slit Arrays
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저자
김성현, 이중민, 심성보, 김진희, 최장희, 한원석, 안광준, 이기주
발행일
201203
출처
Optics Express, v.20 no.6, pp.6365-6374
ISSN
1094-4087
출판사
Optical Society of America (OSA),
DOI
https://dx.doi.org/10.1364/OE.20.006365
협약과제
11MB1300, 반도체 나노구조를 이용한 펌핑용 10 W급 광원기술, 송정호
초록
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 Optical Society of America.
KSP 제안 키워드
Absorption Coefficient, Impulsive Noise(IN), Incident angle, Metal slit, Nano-slit, Photoluminescence (PL) spectra, Slab waveguide, Transmission spectra, light emitter, out-coupling