Berlin 2024 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 28: Surface Atom and Color Center Spin Qubits
QI 28.6: Vortrag
Donnerstag, 21. März 2024, 16:45–17:00, HFT-FT 131
Continuous-Wave, Room-Temperature Masers, using NV-Centers in Diamond — •Christoph W. Zollitsch1,2, Stefan Ruloff1, Yan Fett1, Haakon T. A. Wiedemann1, Rudolf Richter1, Jonathan D. Breeze1,2, and Christopher W. M. Kay1,3 — 1Department of Chemistry, Saarland University, Saarbrücken, Germany — 2Department of Physics \& Astronomy, University College London, London, UK — 3London Centre for Nanotechnology, University College London, London, UK
The concepts of microwave amplification by stimulated emission of radiation (MASER) were developed in the late 1950s, in conjunction with its optical counterpart the laser. While lasers found applications in many fields the applications of masers were highly specialized. This was due to the extreme operating conditions of the first masers, requiring cryogenic temperatures and high vacuum environments. However, the maser*s excellent low-noise microwave amplification as well as its ultra narrow linewidth make it an attractive candidate for a broad range of microwave applications. Here, we characterize the operating space of a diamond NV-center maser system. Key for the continuous emission of microwave photons is a level inversion, in addition to a high-quality, low mode-volume microwave resonator to enhance the spontaneous emission of the NV-centers. We investigate the performance of the maser system as a function of level inversion and resonator quality-factor and construct a phase diagram, identifying the parameter space of operation and discuss the optimal working points and pathways for optimization.
Keywords: Maser; High Cooperativity Coupling; NV-Centers