Thermal management and non-reciprocal control of phonon flow via optomechanics

Alireza Seif, Wade DeGottardi, Keivan Esfarjani and Mohammad Hafezi ()
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Alireza Seif: NIST/University of Maryland
Wade DeGottardi: NIST/University of Maryland
Keivan Esfarjani: University of Virginia
Mohammad Hafezi: NIST/University of Maryland

Nature Communications, 2018, vol. 9, issue 1, 1-8

Abstract: Abstract Engineering phonon transport in physical systems is a subject of interest in the study of materials, and has a crucial role in controlling energy and heat transfer. Of particular interest are non-reciprocal phononic systems, which in direct analogy to electric diodes, provide a directional flow of energy. Here, we propose an engineered nanostructured material, in which tunable non-reciprocal phonon transport is achieved through optomechanical coupling. Our scheme relies on breaking time-reversal symmetry by a spatially varying laser drive, which manipulates low-energy acoustic phonons. Furthermore, we take advantage of developments in the manipulation of high-energy phonons through controlled scattering mechanisms, such as using alloys and introducing disorder. These combined approaches allow us to design an acoustic isolator and a thermal diode. Our proposed device will have potential impact in phonon-based information processing, and heat management in low temperatures.

Date: 2018
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DOI: 10.1038/s41467-018-03624-y

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