Diamond Quantum Photonics and Optomechanics

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• Marko Loncar (Harvard)
• Monday 22 February 2016, 15:30-17:00
• Ryle Seminar (Rutherford 930).

If you have a question about this talk, please contact pjh65.

Diamond possesses remarkable physical and chemical properties, and in many ways is the ultimate engineering material. For example, it is transparent from the ultra-violet to infrared, has a high refractive index (n = 2.4), strong optical nonlinearity (Kerr and Raman) and a wide variety of light-emitting defects. These properties make diamond a highly desirable material for many applications, including those in quantum and nonlinear photonics, high power optics and optomechanics. In my talk, I will review advances in nanotechnology that have enabled fabrication of nanoscale optical devices and chip-scale systems in diamond. One example is diamond-on-insulator platform that enables realization of ultra-high quality factor optical cavities (Q>1e6) [1,2]. Using these devices, microresonator based frequency combs [2] and Raman lasers have been demonstrated [3]. Another important application of diamond is in the field of quantum information science and technology. At the heart of these applications are diamond’s luminescent defects—color centers—and the nitrogen-vacancy (NV) and silicon-vacancy (SiV) color center in particular. These atomic systems in the solid-state possesses all the essential elements for quantum technology, including storage, logic, and communication of quantum information. I will summarize our work on high-Q and small mode volume photonic crystal nanobeam cavities fabricated in bulk diamond substrates using novel angled-etching technique [4,5]. Recent efforts aimed at coupling of these devices to NV and SiV color centers will be presented [6,7]. Finally, our efforts towards achieving strong spin-strain interaction between color centers embedded inside diamond NEMS [8,9] and optomechanical crystals [10] will be reviewed.

[1] B. J. M. Hausmann, et al, “Integrated diamond networks for quantum nanophotonics”, Nano Letters, 12, 1578 (2012) [2] B. J. M. Hausmann et al, “Diamond nonlinear photonics”, Nature Photonics, 8, 369 (2014) [3] P. Latawiec et al, “On-Chip diamond Raman laser” Optica, 2, 924 (2015) [4] M. J. Burek, et al, “Free-standing mechanical and photonic nanostructures in single-crystal diamond”, Nano Lett., 12, 6084 (2012) [5] M. J. Burek, et al, “High-Q optical nanocavities in bulk single-crystal diamond”, Nat. Comm., 5, 5718 (2014) [6] B. J. M. Hausmann, et al, “Coupling of NV centers to photonic crystal nanobeams in diamond”, Nano letters, 13, 5791-5796 (2013) [7] A. Sipahigil et al, “Quantum optical switch controlled by a color center in a diamond nanocavity”, under review (2016) [8] Y. I. Sohn et al, “Dynamic actuation of single-crystal diamond nanobeams”, Appl. Phys. Lett. 107, 243106 (2015) [9] S. Meesala et al, “Enhanced strain coupling of nitrogen vacancy spins to nanoscale diamond cantilevers”, arXiv: 1511.01548 [10] M. J. Burek et al, “ Diamond optomechanical crystals”, arXiv: 1512.04166

This talk is part of the AMOP list series.

This talk is included in these lists:

• AMOP list
• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Ryle Seminar (Rutherford 930)
• School of Physical Sciences
• Thin Film Magnetic Talks

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