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Optics and Electronics Seminar
4:15 PM, Spilker 232
http://campus-map.stanford.edu/index.cfm?ID=04-040 - Map
ATOM-PHOTON INTERACTIONS CHAPERONED BY PHOTONIC CRYSTALS
Professor Michal Bajcsy
Electrical and Computer Engineering
Institute of Quantum Computing
University of Waterloo
When combined with individual atoms or atomic ensembles and quantum optics techniques, photonics
crystals can enhance light-matter interactions to regimes of optical nonlinearities
controllable with single photons. Such systems can be utilized in novel photonic devices,
as building blocks for scalable quantum information processing applications, and in
studies of quantum mechanical phenomena in condensed matter or atomic systems.
In addition to a general overview of recent progress in coupling atoms to nanophotonic structures based on photonics crystals, I will describe my group?s progress in several directions in this area. In particular, we have been studying the potential for super-radiant behavior of an atomic ensemble confined inside a hollow-core photonic-crystal fiber using our recently-built atom cooling and trapping setup, which can load laser-cooled cesium atoms into hollow-core fiber with the help of a magic-wavelength dipole trap.
At the same time, we have been working on integrating high-cooperativity cavities into hollow-core waveguides using laser-written Bragg gratings and photonic-crystal membranes acting as dielectric metasurface mirrors. Such cavities, when loaded with atomic ensembles, have the potential to be used as single-photon controlled optical transistors, photon-number resolving detectors, and precision light sources.
Lastly, I will present some of our theory work exploring single quantum emitters coupled to photonics-crystal waveguides as a platform for deterministic subtraction of single photons.
Michal Bajcsy joined the Institute for Quantum Computing in 2014 as Assistant Professor in the Electrical and Computer Engineering Department. He received both his PhD in Applied Physics and his Bachelor of Science in Electrical and Computer Engineering from Harvard University?s School of Engineering and Applied Sciences. His doctoral work was done under the supervision of Mikhail Lukin and included a demonstration of stationary light pulses and studies of interactions between tightly confined cold atoms and few-photon pulses in a hollow-core photonic-crystal fiber. During his PhD time, Michal also spent several years as a visiting student in the group of Vladan Vuletic at MIT. He completed his postdoctoral training in the Nanoscale and Quantum Photonics Lab of Jelena Vuckovic at Stanford University, where his worked on experiments related to generation of non-classical states of light using solid-state cavity QED systems based on quantum dots embedded in photonic crystals.
Michal's Nanophotonics and Quantum Optics Laboratory at the University of Waterloo focuses on development of scalable photonic devices and quantum optics experimental platforms based on quantum emitters -- such as laser cooled atoms, quantum dots, and color centers -- coupled to nanophotonic structures.