Width dependence of platinum and titanium thermistor characteristics for application in room-temperature antenna-coupled terahertz microbolometer

Amit Banerjee, Hiroaki Satoh, Ajay Tiwari, Catur Apriono, Eko Tjipto Rahardjo, Norihisa Hiromoto, Hiroshi Inokawa

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

For application in a room-temperature microbolometer to detect terahertz waves, "narrow-width effects" on the temperature coefficient of resistance (TCR) and resistivity (ρ) for platinum (Pt) and titanium (Ti) nanowires are investigated. The TCR and ρ of a thermistor could be described by empirical formulas with average measured widths for higher precision. The effect of width on TCR in Pt is lower than that in Ti. The noise equivalent power of the microbolometer could be improved by a factor of 2.3 by replacing the Ti thermistor with a Pt thermistor of the same width (100nm). The results provide a detailed understanding of the narrow-width effect on TCR for Pt and Ti, which, to our knowledge, is lacking at present.

Original languageEnglish
Article number04CC07
JournalJapanese Journal of Applied Physics
Volume56
Issue number4
DOIs
Publication statusPublished - 1 Apr 2017

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