[16a-Z32-1~10] 22.1 Joint Session M "Phonon Engineering"

▲ [16a-Z32-10] Ray phononics: Advanced heat flux manipulations using ballistic phonon transport

〇Roman Anufriev¹, Masahiro Nomura¹ (1.IIS Univ. of Tokyo)

Keywords:phononic crystals, thermal conductivity, phonon

In this work, we propose an alternative concept of heat manipulation based on the particle picture of phonons and their ballistic transport. We call this concept ray phononics as a thermal analogy of ray optics. Our simulations demonstrate the formation of directional thermal fluxes in phononic crystals due to the stochastic phonon motion in phononic crystals. We illustrate possible application of such directional fluxes for emitting directional heat rays, filtering the phonon spectrum, and even protecting a specific region from a thermal gradient.