Hybrid opto-mechanical systems with nitrogen-vacancy centers

TL;DR

This review discusses hybrid opto-mechanical systems integrating mechanical oscillators with nitrogen-vacancy centers in diamond, highlighting coupling mechanisms, quantum state generation, and sensing applications.

Contribution

It provides a comprehensive overview of recent developments in coupling mechanisms and applications of NV center-based hybrid opto-mechanical systems.

Findings

Magnetic and strain coupling enable control of mechanical motion.

NV centers facilitate quantum state generation and sensing.

Applications include cooling, entanglement, and ultra-sensitive detection.

Abstract

In this review, we briefly overview recent works on hybrid (nano) opto-mechanical systems that contain both mechanical oscillators and diamond nitrogen-vacancy (NV) centers. We review two different types of mechanical oscillators. The first one is a clamped mechanical oscillator, such as a cantilever, with a fixed frequency. The second one is an optically trapped nano-diamond with a build-in nitrogen-vacancy center. By coupling mechanical resonators with electron spins, we can use the spins to control the motion of mechanical oscillators. For the first setup, we discuss two different coupling mechanisms which are magnetic coupling and strain induced coupling. We summarize their applications such as cooling the mechanical oscillator, generating entanglements between NV centers, squeezing spin ensembles and et al. For the second setup, we discuss how to generate quantum superposition states with magnetic coupling, and realize matter wave interferometer. We will also review its applications as ultra-sensitive mass spectrometer. Finally, we discuss new coupling mechanisms and applications of the field.