My research interests lie in the field of optics. Quantum and nonlinear optics, to be precise.
Presently, I am involved with CQED (Cavity Quantum Electrodynamics) experiments between our group and the QNOS (Quantum Nanooptics Of Semiconductors) group at the University of Arizona. This experiment essentially involves strong coupling between optical cavities defined by defects in photonic crystals and semiconductor quantum dots. My focus is on the modelling, simulation and fabrication of these photonic crystal devices.
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Here is an scanning electron micrograph of a typical air suspended GaAs photonic crystal slab cavity that has been designed to operate at about 1200nm. The slab is around 200nm thin and has a single layer of InAs quantum dots midway through the slab. |
Publications
- Modelling and Fabrication of GaAs/InAs Photonic-Crystal Cavities for Cavity Quantum Electrodynamics
U K Khankhoje, S-H Kim, B C Richards, J Hendrickson, J Sweet, J D Olitzky, G Khitrova, H M Gibbs and A Scherer; (Submitted, November 2009). - GaAs photonic crystal slab nanocavities: growth, fabrication, and quality factor
J. Sweet, B. C. Richards, J. D. Olitzky, J. Hendrickson, G. Khitrova, H. M. Gibbs; D. Litvinov, D. Gerthsen, D. Z. Hu, D. M. Schaadt, M. Wegener, U. Khankhoje, and A. Scherer; Photonics and Nanostructures - Fundamentals and Applications (In press - doi:10.1016/j.photonics.2009.10.004) - Optimal Fractional Fourier Domains for Quadratic Chirps
Uday Khankhoje, V. M. Gadre; IETE Journal of Research, Vol. 52, No. 1, January-February 2006, pp. 65-70.
Posters
- Fabrication and Characterization of Slab Microcavities
U. Khankhoje, A. Scherer; D. Litvinov, D. Gerthsen, M. Wegener; G. Khitrova, J. Sweet, B. C. Richards, J. Hendrickson, and H. M. Gibbs. The 39th Winter Colloquium on the Physics of Quantum Electronics, Snowbird Utah, January 2009. (Abstract) - Emission Characteristics of Quantum Dots in Photonic Crystal Nanocavities
B. C. Richards, J. Hendrickson, J. Sweet, C. Christenson, M. Pajor, D. Lam, G. Khitrova, H. M. Gibbs; A. Scherer, U. Khankhoje. Montana Meeting on Fundamental Optical Processes in Semiconductors (FOPS), July 2007. (Abstract)
Talks
- Semiconductor Cavity Quantum Electrodynamics
Physics seminar at the Indian Institute of Technology, Bombay on 9th February, 2009.
Past
(Relevant publications by our collaboration before I joined)- Vacuum Rabi splitting in semiconductors Nature Physics 2, 81-90, Feb 2006.
- Quantum dot photonic-crystal-slab nanocavities: Quality factors and lasing Physical Review B, 72 (19), Nov 2005
- Scanning a photonic crystal nanocavity by condensation of xenon Applied Physics Letters 87 (141105), Sept 2005.
- Vacuum Rabi splitting with a single quantum dot in a photonic crystal nanocavity Nature 432, 200-203, Nov 2004.