Design, Characterization and Spin Control in a Diamond-Based Fabry-Perot Microcavity
September 18th, 2017 STEFAN BOGDANOVIC Delft Univerity

Nitrogen-vacancy (NV) centers in diamond are promising building blocks for realizing quantum networks. However, the current success rate of the NV long-distance entanglement protocols is limited (10-8) by the low emission of the NV center’s photons into the resonant zero phonon line (ZPL) and the inefficient photon extraction from the diamond. Coupling of an NV center to an optical cavity can greatly increase the probability of generation and collection of the ZPL photons through the mechanism of Purcell enhancement.

In this talk, I will present our work on fabrication and low-temperature characterization of a fiber-based, tunable Fabry-Perot microcavity enclosing a thin diamond membrane. I will discuss the stability issues of this system, the mechanism of finesse reduction at various measurement regimes and the expected performance of this cavity in the quantum communication experiments. I will present a method of integrating microwave delivery into this architecture and demonstrate control of the NV center spin while preserving optical properties of the mirrors.

Seminar, September 18, 2017, 15:00. Seminar Room

Hosted by Prof. Hugues de Riedmatten