A highly efficient CMOS nanoplasmonic crystal enhanced slow-wave thermal emitter improves infrared gas-sensing devices.

Autor: Pusch A; The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK., De Luca A; Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK., Oh SS; The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK., Wuestner S; The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK., Roschuk T; The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK., Chen Y; The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK.; Department of Electrical and Computer Engineering, National University of Singapore, 117576 Singapore., Boual S; Cambridge CMOS Sensors Ltd., Cambridge CB4 0DL, UK., Ali Z; Cambridge CMOS Sensors Ltd., Cambridge CB4 0DL, UK., Phillips CC; The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK., Hong M; Department of Electrical and Computer Engineering, National University of Singapore, 117576 Singapore., Maier SA; The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK., Udrea F; Department of Engineering, University of Cambridge, Cambridge CB3 0FA, UK., Hopper RH; Cambridge CMOS Sensors Ltd., Cambridge CB4 0DL, UK., Hess O; The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2015 Dec 07; Vol. 5, pp. 17451. Date of Electronic Publication: 2015 Dec 07.
DOI: 10.1038/srep17451
Abstrakt: The application of plasmonics to thermal emitters is generally assisted by absorptive losses in the metal because Kirchhoff's law prescribes that only good absorbers make good thermal emitters. Based on a designed plasmonic crystal and exploiting a slow-wave lattice resonance and spontaneous thermal plasmon emission, we engineer a tungsten-based thermal emitter, fabricated in an industrial CMOS process, and demonstrate its markedly improved practical use in a prototype non-dispersive infrared (NDIR) gas-sensing device. We show that the emission intensity of the thermal emitter at the CO(2) absorption wavelength is enhanced almost 4-fold compared to a standard non-plasmonic emitter, which enables a proportionate increase in the signal-to-noise ratio of the CO(2) gas sensor.
Databáze: MEDLINE
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