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Updated: Jun 25, 2025
10:40
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
Published on: June 28, 2016
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Terahertz emission from diamond nitrogen-vacancy centers.
Sándor Kollarics1,2,3, Bence Gábor Márkus3,4, Robin Kucsera1,2
1Department of Physics, Institute of Physics, Budapest University of Technology and Economics, Műegyetem rkp.3, H-1111 Budapest, Hungary.
Science Advances
|May 29, 2024
Summary
We generated terahertz radiation using diamond nitrogen-vacancy centers. This method achieves population inversion via Zeeman splitting and optical pumping, paving the way for tunable terahertz sources.
Area of Science:
- Quantum optics
- Solid-state physics
- Spectroscopy
Background:
- Coherent terahertz (THz) light sources are crucial for advanced research and applications.
- Terahertz lasers require population inversion for efficient operation.
- Nitrogen-vacancy (NV) centers in diamond are promising solid-state systems for quantum applications.
Purpose of the Study:
- To demonstrate terahertz radiation generation using NV centers in diamond.
- To achieve population inversion in NV centers for THz emission.
- To explore the tunability of NV-center-based THz sources.
Main Methods:
- Utilizing Zeeman splitting of the NV center's S=1 state in a 15 tesla magnetic field.
- Selective optical pumping of the NV center's sublevels using visible light.
- Employing a phase-sensitive THz setup optimized for electron spin resonance (ESR) measurements.
- Conducting light-induced ESR measurements to determine spin-lattice relaxation times.
Main Results:
- Successful generation of terahertz radiation from NV centers in diamond.
- Achieved population inversion through Zeeman splitting and optical pumping, with a THz splitting of 0.42 THz.
- Determined spin-lattice relaxation time, confirming phonon-mediated relaxation and efficient population inversion.
- Demonstrated magnetic field tunability of the generated terahertz radiation.
Conclusions:
- NV centers in diamond can serve as a novel platform for generating tunable terahertz radiation.
- The demonstrated method offers a pathway towards next-generation coherent and tunable THz sources.
- Understanding spin-lattice relaxation is key to optimizing population inversion and THz emission efficiency.
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