Overcoming temperature limits in the optical cooling of solids using light-dressed states

Abstract

Laser cooling of solids currently has a temperature floor of 50 - 100 K. We propose a method that could overcome this using defects, such as diamond color centers, with narrow electronic manifolds and bright optical transitions. It exploits the dressed states formed in strong fields which extend the set of phonon transitions and have tunable energies. This allows an enhancement of the cooling power and diminishes the effect of inhomogeneous broadening. We demonstrate these effects theoretically for the silicon-vacancy and the germanium-vacancy, and discuss the role of background absorption, phonon-assisted emission, and non-radiative decay.

11 pages, 7 figures. v2: Improved discussion of competing heating processes and phonon-assisted decay. New supplemental material with summary of methods, analysis of validity of Born-Markov approach, results for the germanium-vacancy. v3: Simplified presentation of method in main text

References in corpus (8)

• Electron-phonon processes of the silicon-vacancy centre in diamond
• Low temperature investigations of single silicon vacancy colour centres in diamond
• Deterministic coupling of a single silicon-vacancy color center to a photonic crystal cavity in diamond
• Resonant Excitation and Purcell Enhancement of Coherent Nitrogen-Vacancy Centers Coupled to a Fabry-Pérot Micro-Cavity
• Coherent control of a strongly driven silicon vacancy optical transition in diamond
• Coherence properties and quantum control of silicon vacancy color centers in diamond
• Quantum heat statistics with time-evolving matrix product operators
• Cooling phonons with phonons: acoustic reservoir-engineering with silicon-vacancy centers in diamond