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A monolithic resonant terahertz sensor element comprising a metamaterial absorber and micro‐bolometer
Author(s) -
Grant James,
EscorciaCarranza Ivonne,
Li Chong,
McCrindle Iain J. H.,
Gough John,
Cumming David R. S.
Publication year - 2013
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201300087
Subject(s) - terahertz radiation , bolometer , noise equivalent power , detector , metamaterial , optoelectronics , optics , metamaterial absorber , transition edge sensor , terahertz gap , materials science , cardinal point , large format , noise (video) , physics , far infrared laser , terahertz metamaterials , tunable metamaterials , computer science , responsivity , laser , artificial intelligence , image (mathematics)
In this article a monolithic resonant terahertz sensor element with a noise equivalent power superior to that of typical commercial room temperature single pixel terahertz detectors and capable of close to real time read‐out rates is presented. The detector is constructed via the integration of a metamaterial absorber and a micro‐bolometer sensor. An absorption magnitude of 57% at 2.5 THz, a minimum NEP of 37pW /H zand a thermal time constant of 68 ms for the sensor are measured. As a demonstration of detector capability, it is employed in a practical Nipkow terahertz imaging system. The monolithic resonant terahertz detector is readily scaled to focal plane array formats by adding standard read‐out and addressing circuitry enabling compact, low‐cost terahertz imaging.