August 7, 2015
EECS Doctoral Dissertations

Diamond Device Fabrication for Quantum Information Processing and Sensing

Luozhou Li, MIT
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Speaker PhotoLuozhou Li received his BS in Optoelectronics from Huazhong University of Science and Technology (China) in 2009. He did his graduate studies at Columbia University, earning his MS in Electrical Engineering. He is getting his PhD in EECS from MIT. His research focuses on fabricating high-quality nanophotonic diamond devices containing NV centers as single photon sources. These devices use the NV’s long-lived electronic spin state and its optical addressability for applications in quantum information science and sensing. Recent recognitions include the 2013 EIPBN MicroGraph Contest Prize, the 2013 EGSC Professional Development Scholarship and the 2014 SPIE Optics & Photonics Education Scholarship.

The nitrogen vacancy (NV) center in diamond has in recent years emerged as one of the most promising systems for quantum information processing and sensing applications. In this presentation, I will talk about my work done during the past few years on producing diamond thin membranes and developing methodology for fabricating photonic devices on thin membranes. Also, I will talk about scalable fabrication of photonic devices from commercially available bulk diamonds. Optical and spin characteristics of these resultant devices will be discussed. In particular, we are able to enhance the zero-phonon line emission of a single nitrogen vacancy center using a photonic crystal cavity and improve the broadband photoluminescence collection efficiency through a bullseye circular grating.

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