Masahiro Nomura, Associate Professor, and Roman Anufriev (Research Fellow, The University of Tokyo, Foreign Research Fellow, Japan Society for the Promotion of Science) and others at the Micro-Nano Interdisciplinary Research Center, Institute of Industrial Science, University of Tokyo, et al. By forming the structure, it gave directionality to the heat flow and announced that it succeeded in collecting heat.
Since heat diffuses in all directions in a solid, more heat cannot flow in a specific direction, and there are increasing expectations for heat flow control in devices that require more advanced heat management.However, unlike electronics and photonics, heat is mainly handled on a large scale, and research on advanced heat conduction using nanotechnology has only recently begun.
In the research, we demonstrated that it is possible to give directivity to the heat flow by regularly arranging nano-sized circular holes in the silicon thin film and forming a structure in which phonons, which are heat carriers, move linearly. bottom.Then, using the directivity of phonons, the holes are arranged radially so that the phonons are concentrated at one point to form a lens-like structure, and as a result, the heat flow is collected in a very narrow region of about 100 nm in the world. I succeeded for the first time in.
The results of this research will bring new options for heat flow control in solids, develop basic research in the field of phonon engineering, and can be expected to be applied to the field of semiconductors where advanced heat management is desired.Considering the improvement of heat dissipation performance in semiconductors, the directivity of heat flow that has not been conscious until now, structural design that actively uses it, and the use in systems that require local heat flow and temperature distribution can be considered.Advanced thermal control can be expected to contribute to the further development of electronics and photonics by solving heat dissipation problems.
Paper information:[Nature communications] Heat guiding and focusing using phononic nanostructures
