[16a-2F-1~12] 3.14 Optical control devices and optical fibers

[16a-2F-6] Observation of the reflection spectra from dipole antennas formed on HfO₂ / Al₂O₃

〇Junichi Miyata¹, Yuto Yamamoto¹, Takahiro Kawano¹, Yuta Kunichika¹, Kenichi Kasahara¹, Naoki Ikeda², Yoshimasa Sugimoto² (1.Ritsumeikan Univ., 2.NIMS)

Keywords:antenna

Gases such as CO₂ and NO₂ has a large absorbing characteristics at the wavelength of the mid-infrared region and gas sensor technology using mid-infrared light has been developed. However, the performance of the photodetector for the mid-infrared light source is insufficient. So the development of the photodetector fast response and high sensitivity is desired. We are currently considering the structure of photodetector equipped with optical antennas having a light collecting effect and electric field enhancement effect. This time, we observed the reflection spectra by the device equipped with dipole optical antennas on HfO₂ / Al₂O₃.