[19p-231A-1~8] 16.1 Fundamental properties, evaluation, process and devices in disordered materials

△ [19p-231A-2] Terahertz spectroscopic characterization of Ge₂Sb₂Te₅ phase change material

〇Kotaro Makino¹, Kosaku Kato², Yuta Saito¹, Paul Fons¹, Alexander V. Kolobov¹, Junji Tominaga¹, Takashi Nakano¹, Makoto Nakajima² (1.AIST, 2.Osaka Univ.)

Keywords:phase change material, terahertz spectroscopy

Ge-Sb-Te phase change materials exhibit reversible phase switching between amorphosu and cyrstalline states that cause significant change in electrica and optical properties. In this study, we carried out terahertz time-domain spectroscopy in Ge₂Sb₂Te₅ phase change material and found that optical properties in terahertz frequency range drastically vary depending on the phases.