Invasive optical pumping for room-temperature masers, time-resolved EPR, triplet-DNP, and quantum engines exploiting strong coupling | Zendy

Hao Wu | Zendy; Shamil Mirkhanov | Zendy; Wern Ng | Zendy; KuanCheng Chen | Zendy; Yuling Xiong | Zendy; Mark Oxborrow | Zendy

Open Access

Invasive optical pumping for room-temperature masers, time-resolved EPR, triplet-DNP, and quantum engines exploiting strong coupling

Author(s) -

Hao Wu,

Shamil Mirkhanov,

Wern Ng,

KuanCheng Chen,

Yuling Xiong,

Mark Oxborrow

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.401294

Subject(s) - materials science , optics , pentacene , electron paramagnetic resonance , optical pumping , maser , optoelectronics , coupling (piping) , atomic physics , laser , physics , nuclear magnetic resonance , layer (electronics) , metallurgy , composite material , thin film transistor

We explore an approach for optically pumping a body of optically dense magnetic material. This challenge arises in time-resolved electron paramagnetic resonance (TREPR), triplet-based dynamic nuclear polarisation (DNP), and cavity QED. Crystals of pentacene-doped p-terphenyl were grown around variously shaped ends of optical waveguides, through which pump light could be injected deeply into the crystal. When incorporated into a maser as the gain medium, we found that, compared to conventional side-pumping, 11 times less pump beam intensity was needed to reach the masing threshold and 54 times more pulse energy could be absorbed by the gain medium without damage, resulting in a record peak output power of -5 dBm.

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