



01505nas a2200157   4500008004100000245008300041210006900124260001400193490000900207520101200216100001801228700002101246700002201267700002101289856003701310       2018                        eng d00aThermal management and non-reciprocal control of phonon flow via optomechanics0 aThermal management and nonreciprocal control of phonon flow via   c2018/3/230 v9(1)3 a<p>Engineering phonon transport in physical systems is a subject of interest in the study of materials and plays 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 recent 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.&nbsp;</p>1 aSeif, Alireza1 aDeGottardi, Wade1 aEsfarjani, Keivan1 aHafezi, Mohammad  uhttps://arxiv.org/abs/1710.08967