CVD nanodiamonds with non-blinking, near transform-limited linewidths emitters

TL;DR

This paper reports the creation of highly stable, nearly transform-limited single photon emitters in nanodiamonds, which are crucial for quantum networks and hybrid photonic systems.

Contribution

It demonstrates optically stable silicon vacancy emitters in nanodiamonds with linewidths close to the lifetime limit, showing minimal spectral diffusion and high photostability.

Findings

Linewidths as narrow as 325 MHz, comparable to lifetime limit

Emitters exhibit minimal spectrum diffusion

Emitters are highly photostable even under high excitation

Abstract

Near transform-limited single photon sources are required for perfect photon indistinguishability in quantum networks. Having such sources in nanodiamonds is particularly important since it can enable engineering hybrid quantum photonic systems. In this letter, we report the generation of optically stable, nearly transform-limited single silicon vacancy emitters in nanodiamonds. Lines as narrow as 325 MHz are reported, which is comparable to the lifetime limited linewidth. Moreover, the emitters exhibit minimal spectrum diffusion and absolute photostability, even if pumped well above saturation. Our results suggest that nanodiamonds can host color centers with supreme properties suitable for hybrid photonic devices and quantum information.