[9a-W621-1~12] 3.12 Nanoscale optical science and near-field optics

[9a-W621-12] Temperature constant superheating heating of water by the photothermal conversion of titanium nitride nanostructures on sapphire substrates

〇Satoshi Ishii^1,2, Shunsuke Murai³, Ryosuke Kamakura³, Hiroyuki Sakamoto³, Shinya Goya³, Thang Dao¹, Satish Shinde¹, Kyoko Namura³, Motofumi Suzuki³, Tadaaki Nagao^1,4, Katsuhisa Tanaka³ (1.NIMS, 2.Univ. of Tsukuba, 3.Kyoto Univ., 4.Hokkaido Univ.)

Keywords:photothermal conversion, superheat, temperature measurement

Titanium nitride (TiN) is an efficient photothermal converter when it forms nanostructures. In the current study, we measured the temperature of water on TiN nanostructures by Raman spectroscopy. While the linear temperature increase was recorded below ~20 mW,,aove ~20 mW a plateau region appeared in the superheated state. This unique feature is related mW highly thermal conductive sapphire substrate.