Color Center Quantum Nanophotonics

Thursday, February 08, 2018
1:00 PM to 2:00 PM
EER 3.640
Free and open to the public

Beyond the year 2030, over a decade after the End of Moore’s Law, the computing and
communication technologies supporting the Big Data and the Internet of Things will be based on
a completely new generation of devices. The Quantum Technologies are the forerunning solution
to this challenge offering the exponential reduction in data storage using quantum bits (qubits), the
exponential speedup in algorithmic processing time, and the cryptographic schemes protected from
eavesdropping. The Quantum Internet, currently investigated by both academia and industry, aims
to connect the local quantum memory-based nodes using fiber and satellite links to provide secure
communication. A scalable implementation of this system relies on identical long-lived quantum
bits with an efficient optical interface. Color centers are exceptionally well-positioned optically
addressable solid-state qubits for integration in quantum computing and communication. What sets
them apart from other implementations, such as superconducting circuits and quantum dots, are
the long spin-coherence times, the optical spin-readout, high emission homogeneity in an
ensemble, and the proposed entangling schemes.

I will present the progress in developing elements of the Quantum Internet by integrating silicon
carbide and diamond color centers into scalable photonic platforms. Our research utilizes novel
nanofabrication techniques, quantum and electromagnetic modeling, and confocal spectroscopy to
tailor interaction between light and matter. Our results include a scalable array of roomtemperature
qubits in silicon carbide, high Purcell enhancement of diamond quantum emitters, and
a model of a new quantum light-generating mechanism called the subradiant photon blockade.

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Marina Radulaski

Stanford University

Marina Radulaski is a Nano- and Quantum Science and Engineering Postdoctoral Fellow at
Stanford University’s Ginzton Laboratory where she investigates quantum optics and scalable
solid-state photonics. She obtained a PhD in Applied Physics from Stanford University under the
supervision of Prof. Jelena Vuckovic, a BSc/MSc in Physics from the University of Belgrade,
Serbia, and a BSc/MSc in Computer Science from the Union University, Serbia. Marina was
selected among the Rising Stars in EECS in 2017, Stanford Graduate Fellows 2012-2014,
Scientific American’s “30-Under-30 Up and Coming Physicists” in 2012, and was the Stanford
Applied Physics Honorary Commencement Speaker in 2016. She has performed quantum and
solid state physics research internationally at the Lawrence Berkeley National Lab, Hewlett-
Packard Labs, Oxford University, the Institute for Quantum Optics and Quantum Information in
Vienna, Helmholtz Center Berlin, the Institute of Physics of the Polish Academy of Science, and
the Institute of Physics Belgrade. In addition to research, Marina enjoys building communities and
promoting science through podcasts, videos and outreach events.