Sub-2 Kelvin characterization of nitrogen-vacancy centers in silicon carbide nanopillars
- URL: http://arxiv.org/abs/2401.10509v2
- Date: Thu, 25 Jul 2024 18:39:41 GMT
- Title: Sub-2 Kelvin characterization of nitrogen-vacancy centers in silicon carbide nanopillars
- Authors: Victoria A. Norman, Sridhar Majety, Alex H. Rubin, Pranta Saha, Jeanette Simo, Bradi Palomarez, Liang Li, Pietra B. Curro, Scott Dhuey, Selven Virasawmy, Marina Radulaski,
- Abstract summary: We develop a near infrared quantum emitter, the nitrogen-vacancy (NV) center in 4H-SiC, and integrate it, at an ensemble level, with nanopillar structures that enhance photon collection efficiency into an objective lens.
measurements show no significant linewidth broadening of NV ensemble emission and up to 28-fold enhancement in collected emission.
With additional filtering, we measure emitter lifetimes of NV centers in a basal ($hk$) and an axial ($kk$) orientation unveiling their cryogenic values of 2.21 ns and 2.86 ns.
- Score: 3.7333781189681337
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: The development of efficient quantum communication technologies depends on the innovation in multiple layers of its implementation, a challenge we address from the fundamental properties of the physical system at the nano-scale to the instrumentation level at the macro-scale. We select a promising near infrared quantum emitter, the nitrogen-vacancy (NV) center in 4H-SiC, and integrate it, at an ensemble level, with nanopillar structures that enhance photon collection efficiency into an objective lens. To characterize NV center properties at the unprecedented sub-2 Kelvin temperatures, we incorporate compatible superconducting nanowire single photon detectors inside the chamber of an optical cryostat and create the ICECAP, the Integrated Cryogenic system for Emission, Collection And Photon-detection. ICECAP measurements show no significant linewidth broadening of NV ensemble emission and up to 28-fold enhancement in collected emission. With additional filtering, we measure emitter lifetimes of NV centers in a basal ($hk$) and an axial ($kk$) orientation unveiling their cryogenic values of 2.21 ns and 2.86 ns.
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