Past events

Quantum Frequency Conversion of Single Photon States

Dr. Kartik Srinivasan, National Institute of Standards and Technology (NIST), USA

Part of the Zepler Institute Quantum Science Distinguished Lecture Series


Control of the wavelength and temporal profile of quantum states of light is an important resource in the development of photonic quantum information technology, where it can be used to interface disparate physical systems, overcome fabrication-induced inhomogeneity, and allow for more optimal detection.  In this talk, I will discuss such quantum frequency conversion from two different perspectives. First, I will review proof-of-principle experiments using single photon states and well-develop frequency conversion technology in nonlinear crystals, where we convert telecom photons to the visible, produce identical photons from initially spectrally distinct sources, and modify the temporal shape of the photon wavepackets.  I will then discuss our recent efforts to develop new types of frequency conversion technology in a scalable, chip-based platform, using both material nonlinearities (four-wave-mixing) and engineered nonlinearities based on radiation pressure coupling between photons and phonons (cavity optomechanics).


Kartik Srinivasan is a Project Leader in the Nanofabrication Research Group in the CNST. He received B.S., M.S., and Ph.D. degrees in Applied Physics from the California Institute of Technology, where his graduate research was supported by a Fannie and John Hertz Foundation Fellowship. After receiving his B.S., he worked for one year at XPonent Photonics, a startup company based in Monrovia, CA. Before coming to NIST, he worked at Caltech as a Postdoctoral Fellow at the Center for the Physics of Information. At the CNST, he leads projects in the field of nanophotonics. Kartik has published over 60 peer-reviewed papers in journals such as Applied Physics Letters, Physical Review Letters, Nature, and Science, on topics including microcavity lasers, chip-based cavity quantum electrodynamics, near-field optical probing, quantum frequency conversion, and on the electromagnetic design and nanofabrication of photonic crystal devices. He has been awarded both the NIST Sigma Xi Young Scientist Award for 2011 and the Presidential Early Career Award for Scientists and Engineers (PECASE), the highest honor bestowed by the U.S. government on outstanding scientists and engineers beginning their independent research careers.

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