[22p-P04-1~23] 3.11 Nanoscale optical science and near-field optics (formerly 3.12)

[22p-P04-16] Fabrication and UV response of hafnium (IV) oxide nanoantennas

〇SHUHEI TOMITA¹, Shunsuke Murai¹, Katsuhisa Tanaka¹ (1.Kyoto Univ.)

Keywords:

nanoantennas,HfO2

Nanoantennas with high refractive index and low extinction coefficient dielectrics enable sharp SLR excitation. In particular, TiO₂ has a very high refractive index and transparency in the visible region, but absorption by the interband transition makes it difficult to apply in the ultraviolet region. In this study, we fabricated short-period nanoantennas composed of HfO₂, which is a wide bandgap dielectric and revealed the superiority of HfO₂ for UV applications from optical characterization.