Zero-power infrared digitizers based on plasmonically enhanced micromechanical photoswitches (English)

In: Nature nanotechnology   ;  12 ,  10  ;  2017
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State-of-the-art sensors use active electronics to detect and discriminate light, sound, vibration and other signals. They consume power constantly, even when there is no relevant data to be detected, which limits their lifetime and results in high costs of deployment and maintenance for unattended sensor networks. Here we propose a device concept that fundamentally breaks this paradigm--the sensors remain dormant with near-zero power consumption until awakened by a specific physical signature associated with an event of interest. In particular, we demonstrate infrared digitizing sensors that consist of plasmonically enhanced micromechanical photoswitches (PMPs) that selectively harvest the impinging electromagnetic energy in design-defined spectral bands of interest, and use it to create mechanically a conducting channel between two electrical contacts, without the need for any additional power source. Our zero-power digitizing sensor prototypes produce a digitized output bit (that is, a large and sharp off-to-on state transition with an on/off conductance ratio >1012 and subthreshold slope >9 dec nW-1 ) when exposed to infrared radiation in a specific narrow spectral band (∼900 nm bandwidth in the mid-infrared) with the intensity above a power threshold of only ∼500 nW, which is not achievable with any existing photoswitch technologies.

Table of contents – Volume 12, Issue 10

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The tables of contents are generated automatically and are based on the data records of the individual contributions available in the index of the TIB portal. The display of the Tables of Contents may therefore be incomplete.

929
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934
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936
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937
Donor qubits in silicon: Electrical control of nuclear spins
Andrea Morello | 2017
938
Optoelectronics: Letting photons out of the gate
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940
Internet of things: Sensing without power
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941
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942
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944
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953
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958
All-electric control of donor nuclear spin qubits in silicon
Anthony J Sigillito / Alexei M Tyryshkin / Thomas Schenkel / Andrew A Houck / Stephen A Lyon | 2017
963
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969
Zero-power infrared digitizers based on plasmonically enhanced micromechanical photoswitches
Zhenyun Qian / Sungho Kang / Vageeswar Rajaram / Cristian Cassella / Nicol E Mcgruer / Matteo Rinaldi | 2017
974
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987
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1015
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1016
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