Strongly cavity-enhanced spontaneous emission from silicon-vacancy centers in diamond

Jingyuan Linda Zhang, Shuo Sun, Michael J. Burek, Constantin Dory, Yan-Kai Tzeng, Kevin A. Fischer, Yousif Kelaita, Konstantinos G. Lagoudakis, Marina Radulaski, Zhi-Xun Shen, Nicholas A. Melosh, Steven Chu, Marko Lončar, Jelena Vučković

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)
9 Downloads (Pure)


Quantum emitters are an integral component for a broad range of quantum technologies, including quantum communication, quantum repeaters, and linear optical quantum computation. Solid-state color centers are promising candidates for scalable quantum optics due to their long coherence time and small inhomogeneous broadening. However, once excited, color centers often decay through phonon-assisted processes, limiting the efficiency of single-photon generation and photon-mediated entanglement generation. Herein, we demonstrate strong enhancement of spontaneous emission rate of a single silicon-vacancy center in diamond embedded within a monolithic optical cavity, reaching a regime in which the excited-state lifetime is dominated by spontaneous emission into the cavity mode. We observe 10-fold lifetime reduction and 42-fold enhancement in emission intensity when the cavity is tuned into resonance with the optical transition of a single silicon-vacancy center, corresponding to 90% of the excited-state energy decay occurring through spontaneous emission into the cavity mode. We also demonstrate the largest coupling strength (g/2π = 4.9 ± 0.3 GHz) and cooperativity (C = 1.4) to date for color-center-based cavity quantum electrodynamics systems, bringing the system closer to the strong coupling regime.
Original languageEnglish
Pages (from-to)1360-1365
Number of pages6
JournalNano Letters
Issue number2
Early online date29 Jan 2018
Publication statusPublished - 1 Feb 2018


  • purcell enhancement
  • single photon generation
  • defect center materials
  • diamond
  • silicon vacancy center
  • nanophotonics


Dive into the research topics of 'Strongly cavity-enhanced spontaneous emission from silicon-vacancy centers in diamond'. Together they form a unique fingerprint.

Cite this