[9p-C310-1~15] 6.4 Thin films and New materials

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[9p-C310-1] [The 60th Young Scientist Presentation Award Speech] Anatomy of Laser-Induced Orientation Control in Tellurium Thin Films

〇Yuta Kobayashi¹, Arata Mitsuzuka¹, Haruo Kondo¹, Makoto Shoshin¹, Jun Uzuhashi², Tadakatsu Ohkubo², Masamitsu Hayashi¹, Masashi Kawaguchi¹ (1.Univ. Tokyo, 2.NIMS)

Keywords:

tellurium,anisotropic materials,ultrashort laser pulses

Tellurium (Te) exhibits strongly anisotropic electrical and optical responses owing to its one-dimensional helical-chain structure. We have previously demonstrated that the c-axis orientation of Te thin films can be controlled using linearly polarized pulsed laser irradiation. In this presentation, we develop a simple kinetic model based on orientation-dependent optical absorption, selective melting, and recrystallization induced by the linear dichroism of Te. We show that this model quantitatively describes the evolution of the crystal-axis orientation during pulsed-laser irradiation.