Imperial College London
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ProfessorKristelFobelets

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor of Nanodevices
 
 
 
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Contact

 

+44 (0)20 7594 6236k.fobelets Website CV

 
 
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Assistant

 

Ms Susan Brace +44 (0)20 7594 6215

 
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Location

 

714Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Delgado-Notario:2018:10.3390/s18020543,
author = {Delgado-Notario, JA and Velazquez-Perez, JE and Meziani, YM and Fobelets, K},
doi = {10.3390/s18020543},
journal = {Sensors},
title = {Sub-THz imaging using non-resonant HEMT detectors},
url = {http://dx.doi.org/10.3390/s18020543},
volume = {18},
year = {2018}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Plasma waves in gated 2-D systems can be used to efficiently detect THz electromagnetic radiation. Solid-state plasma wave-based sensors can be used as detectors in THz imaging systems. An experimental study of the sub-THz response of II-gate strained-Si Schottky-gated MODFETs (Modulation-doped Field-Effect Transistor) was performed. The response of the strained-Si MODFET has been characterized at two frequencies: 150 and 300 GHz: The DC drain-to-source voltage transducing the THz radiation (photovoltaic mode) of 250-nm gate length transistors exhibited a non-resonant response that agrees with theoretical models and physics-based simulations of the electrical response of the transistor. When imposing a weak source-to-drain current of 5 μA, a substantial increase of the photoresponse was found. This increase is translated into an enhancement of the responsivity by one order of magnitude as compared to the photovoltaic mode, while the NEP (Noise Equivalent Power) is reduced in the subthreshold region. Strained-Si MODFETs demonstrated an excellent performance as detectors in THz imaging.
AU  - Delgado-Notario,JA
AU  - Velazquez-Perez,JE
AU  - Meziani,YM
AU  - Fobelets,K
DO  - 10.3390/s18020543
PY  - 2018///
SN  - 1424-2818
TI  - Sub-THz imaging using non-resonant HEMT detectors
T2  - Sensors
UR  - http://dx.doi.org/10.3390/s18020543
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000427544000226&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/69774
VL  - 18
ER  -
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