Affiliation:
1. Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China
2. Beijing Academy of Quantum Information Sciences Beijing 100193 China
3. Department of Materials Imperial College London South Kensington London SW7 2AZ UK
Abstract
AbstractCoherent sources exploiting the stimulated emission of non‐equilibrium quantum systems, i.e., gain media, have proven indispensable for advancing fundamental research and engineering. The operating electromagnetic bands of such coherent sources have been continuously enriched for increasing demands. Nevertheless, simultaneous generation of radiation in multiple widely‐separated bands presents formidable challenges with a single gain medium. Herein, a mechanism of simultaneously realizing the stimulated emission of radiation in the visible and microwave bands, i.e., lasing and masing actions, at ambient conditions by utilizing photoexcited singlet and triplet states of pentacene doped in p‐terphenyl is proposed. The possibility is validated by the observed amplified spontaneous emission (ASE) at 645 nm with a narrow linewidth around 1 nm from the pentacene‐doped p‐terphenyl crystal used for masing at 1.45 GHz and consolidated by a 20‐fold‐lower threshold of ASE compared to the reported masing threshold. The overall threshold of the pentacene‐based multiband coherent source can be optimized by appropriate alignment of the pump‐light polarization with the pentacene's transition dipole moment. This work not only shows a great promise on immediate realization of multiband coherent sources but also establishes an intriguing solid‐state platform for fundamental research of quantum optics in multiple frequency domains.
Funder
National Natural Science Foundation of China
China Postdoctoral Science Foundation
National Postdoctoral Program for Innovative Talents
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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