We present a theoretical study of a many-emitter phonon laser based on optically driven semiconductor quantum dots placed within an acoustic nanocavity. A transformation of the phonon laser Hamiltonian leads to a Tavis-Cummings type interaction with an unexpected additional many-emitter energy shift. This many-emitter interaction with the cavity mode results in a variety of phonon resonances which dependent strongly on the number of participating emitters. These collective resonances show the highest phonon output. Furthermore, we show that the output can be increased even more via lasing at the two phonon resonance.
Leon Droenner, Julia Kabuss, and Alexander Carmele, "Quantum many-body correlations in collective phonon-excitations," Proc. SPIE 10526, Physics and Simulation of Optoelectronic Devices XXVI, 105260G (Presented at SPIE OPTO: January 30, 2018; Published: 23 February 2018); https://doi.org/10.1117/12.2296607.
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