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13 March 2024 Room-temperature microwave MASERs with LED pumping: a step towards practical realization
Juna Sathian, Sophia Long, Lisa Lopez, Bethan Ford, Francois Balembois, Wern Ng, Daan M. Arroo, Neil McN Alford, Hamdi Torun
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Proceedings Volume PC12912, Quantum Sensing, Imaging, and Precision Metrology II; PC129121Q (2024) https://doi.org/10.1117/12.3003423
Event: SPIE Quantum West, 2024, San Francisco, California, United States
Abstract
Room-temperature MASERs (Microwave Amplification by Stimulated Emission of Radiation) are coherent sources that exploit stimulated emission to amplify electromagnetic waves at microwave frequencies. Here we report the first demonstration of an LED-pumped maser based on photo-excited triplet states of pentacene in p-terphenyl. The LED light is brightness enhanced and guided using a Cerium-doped Yttrium Aluminium Garnet luminescent crystal that uses light recycling to reach record luminance and power levels. We observe stable maser emission at 1.45 GHz using LED pumping at a much lower pump threshold power. This new maser is cost-effective, safe, and environmentally friendly, and hence ensures a wide variety of potential uses, including more sensitive magnetic resonance body scanners, quantum optical coherence tomography, advanced quantum computer components, portable atomic clocks, and better radio astronomy devices for deep space exploration.
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Juna Sathian, Sophia Long, Lisa Lopez, Bethan Ford, Francois Balembois, Wern Ng, Daan M. Arroo, Neil McN Alford, and Hamdi Torun "Room-temperature microwave MASERs with LED pumping: a step towards practical realization", Proc. SPIE PC12912, Quantum Sensing, Imaging, and Precision Metrology II, PC129121Q (13 March 2024); https://doi.org/10.1117/12.3003423
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KEYWORDS
Light emitting diodes
Microwave radiation
Cerium
YAG lasers
Absorption
Monte Carlo methods
Pulsed laser operation
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