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Solution-processed cavity and slow-light quantum electrodynamics in near-infrared silicon photonic crystals

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4 Author(s)
Bose, R. ; Optical Nanostructures Laboratory, Center for Integrated Science and Engineering, Solid-State Science and Engineering and Mechanical Engineering, Columbia University, New York, New York 10027, USA ; McMillan, J.F. ; Gao, J. ; Wong, C.W.

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We demonstrate enhanced emission of solution-processed sparse lead sulfide quantum dots (QDs) coupled to confined as well as propagating modes in silicon photonic crystals at near-infrared communications wavelengths. In the cavity case, by using cold-cavity characterization using on-board waveguides or cross-polarization techniques, we show that the coupled QD lineshape is identical to the cold-cavity spectra. For the photonic crystal waveguides (PhCWGs), we use transmission spectra for the PhCWG as well as three-dimensional finite difference time domain techniques to validate enhancements due to the propagating mode. The observation of room-temperature quantum electrodynamics using postfabrication QD integration techniques is promising for further studies.

Published in:

Applied Physics Letters  (Volume:95 ,  Issue: 13 )

Date of Publication:

Sep 2009

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