[15p-B12-1~19] 3.12 Nanoscale optical science and near-field optics

▼ [15p-B12-17] Hole Array Perfect Absorbers for Spectrally Selective Midwavelength Infrared Pyroelectric Detectors

〇(P)Thang DAO^1,2, Satoshi Ishii^1,2, Takahiro Yokoyama^1,2, Tomomi Sawada^1,2, Ramu Pasupathi Sugavaneshwar^1,2, Kai Chen^1,2, Yoshiki Wada¹, Toshihide Nabatame^1,2, Tadaaki Nagao^1,2,3 (1.International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan, 2.CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan, 3.Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan)

Keywords:Spectrally selective infrared detector, Plasmonic metamaterials, Perfect absorber

Uncooled pyroelectric infrared sensors are widely used in many applications ranging from infrared spectroscopy to thermal imaging because they exhibit fast and wide spectral response with high sensitivity and robustness, low costs and room temperature operation. To realize high performances as well as making them more industry compatible, besides focusing on the development of pyroelectric materials, the structural design has been intended to efficiently absorb the thermal radiation, especially at desired wavelengths in which their spectrum responses can exhibit the wavelength selectivity for such applications in infrared spectroscopy and multicolor infrared imaging. In this work, by taking advantage of the spectrally-selective and efficient light-heat conversion of plasmonic hole array perfect absorber, integrated with a highly c-axis oriented hexagonal ZnO film crystal, we demonstrate an efficient design for wavelength-selective pyroelectric infrared detectors.