講演情報
[15p-K501-3]Enhanced thermoreflectance coefficient using graphene layers on SiO2/Si
〇(D)WenChiao Lin1, Yunhui Wu1, Youhei Ogawara1, Byunngi Kim2, Sotaro Ito1, Masahiro Nomura1 (1.IIS Univ. of Tokyo, 2.Science Tokyo)
キーワード：
TDTR、thermoreflectance coefficient、graphene
Time-domain thermoreflectance (TDTR) is a non-contact technique widely used for measuring material thermal conductivity, typically relying on metal thin films as transducers. However, metal deposition poses challenges for suspended thin films and thermolabile materials. Graphene, with its exceptional thermal, electrical, and optical properties, offers a promising alternative. This study employs 2D TDTR to measure the thermoreflectance coefficient (CTR) of few-layer graphene. Results show that graphene with 2 to 8 layers exhibits a CTR comparable to gold at a wavelength of 525 nm, ranging from 3x10−4 K−1 to 9x10−4 K−1. These findings highlight the potential of few-layer graphene as a viable replacement for traditional metal transducers, enabling more sensitive and accurate thermal measurements.