Synchronously wired infrared antennas for resonant single-quantum-well photodetection up to room temperature

Hideki T. Miyazaki (), Takaaki Mano, Takeshi Kasaya, Hirotaka Osato, Kazuhiro Watanabe, Yoshimasa Sugimoto, Takuya Kawazu, Yukinaga Arai, Akitsu Shigetou, Tetsuyuki Ochiai, Yoji Jimba and Hiroshi Miyazaki
Additional contact information
Hideki T. Miyazaki: National Institute for Materials Science
Takaaki Mano: National Institute for Materials Science
Takeshi Kasaya: National Institute for Materials Science
Hirotaka Osato: National Institute for Materials Science
Kazuhiro Watanabe: National Institute for Materials Science
Yoshimasa Sugimoto: National Institute for Materials Science
Takuya Kawazu: National Institute for Materials Science
Yukinaga Arai: National Institute for Materials Science
Akitsu Shigetou: National Institute for Materials Science
Tetsuyuki Ochiai: National Institute for Materials Science
Yoji Jimba: Nihon University
Hiroshi Miyazaki: Tohoku University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Optical patch antennas sandwiching dielectrics between metal layers have been used as deep subwavelength building blocks of metasurfaces for perfect absorbers and thermal emitters. However, for applications of these metasurfaces for optoelectronic devices, wiring to each electrically isolated antenna is indispensable for biasing and current flow. Here we show that geometrically engineered metallic wires interconnecting the antennas can function to synchronize the optical phases for promoting coherent resonance, not only as electrical conductors. Antennas connected with optimally folded wires are applied to intersubband infrared photodetectors with a single 4-nm-thick quantum well, and a polarization-independent external quantum efficiency as high as 61% (responsivity 3.3 A W−1, peak wavelength 6.7 μm) at 78 K, even extending to room temperature, is demonstrated. Applications of synchronously wired antennas are not limited to photodetectors, but are expected to serve as a fundamental architecture of arrayed subwavelength resonators for optoelectronic devices such as emitters and modulators.

Date: 2020
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DOI: 10.1038/s41467-020-14426-6

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