Fabrication of Nano-Antennas for Superconducting Infrared Detectors

Author

Kawakami, A. ; Saito, S. ; Hyodo, M.

Author_Institution

Kobe Adv. ICT Res. Center, Nat. Insti tute of Inf. & Commun. Technol., Kobe, Japan

Volume

21

Issue

3

fYear

2011

fDate

6/1/2011 12:00:00 AM

Firstpage

632

Lastpage

635

Abstract

To improve the response performance of superconducting infrared detectors, we have developed a fabrication process for nano-antennas. A nano-antenna consists of a dipole antenna, and a superconducting thin film strip placed in the antenna´s center. By measuring the transition temperature of the superconducting strips, we confirmed that their superconductivity maintained a good condition after the nano-antenna fabrication process. We also evaluated nano-antenna characteristics using Fourier transform infrared spectroscopy. The evaluated antenna length and width were respectively set at around 2400 nm and 400 nm, and the antennas were placed at intervals of several micrometers around the area of 1 mm² . In an evaluation of spectral transmission characteristics, clear absorption caused by antenna effects was observed at around 1400 cm^-1. High polarization dependencies were also observed.

Keywords

Fourier transform spectroscopy; dipole antennas; infrared detectors; infrared spectroscopy; nanofabrication; strips; superconducting photodetectors; superconducting thin films; Fourier transform infrared spectroscopy; antenna length; antenna width; clear absorption; dipole antenna; nanoantenna fabrication; spectral transmission characteristics; superconducting infrared detector; superconducting thin film strip; Arrays; Dipole antennas; Fabrication; Resistance; Resists; Tin; Detector; MgO; NbN; epitaxial; infrared; nano-antenna;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2010.2102330

Filename

5706387