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  4. An Experimental Study Of The Photoresponse Of 1T-1R Oscillators Based On Vanadium Dioxide: Towards Spiking Sensing Systems
 
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conference paper

An Experimental Study Of The Photoresponse Of 1T-1R Oscillators Based On Vanadium Dioxide: Towards Spiking Sensing Systems

Rosca, Teodor  
•
Qaderi, Fatemeh  
•
Riccardi, Marco  
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January 1, 2021
2021 21St International Conference On Solid-State Sensors, Actuators And Microsystems (Transducers)
21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers)

In this work we investigate the effect of visible light radiation on compact 1T-1R relaxation spiking oscillator cells based on 2-terminal Vanadium dioxide (VO2) structures. We illuminate the devices using a tunable wavelength laser between 400 and 850 nm at power levels ranging from 1 to 70 mW. We observe a strong dependence between the insulator-to-metal switching thresholds of VO2 and the power and wavelength of incident radiation. In addition, we find that the dependence of DC switching characteristics (switching thresholds, R-OFF and R-ON) on light intensity clearly affects the free running frequency of the 1T-1R oscillator, which enables the circuit to function as a power-to-frequency transducer across a wide of wavelengths in the visible spectrum. Excellent transducing linearity of the proposed light-to-frequency conversion is reported in all investigated visible light spectrum. This work is a significant step forward in the field of spiking VO2 oscillators as light transducers for future IoT and neuromorphic applications.

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Type
conference paper
DOI
10.1109/TRANSDUCERS50396.2021.9495742
Web of Science ID

WOS:000707041600099

Author(s)
Rosca, Teodor  
•
Qaderi, Fatemeh  
•
Riccardi, Marco  
•
Martin, Olivier J. F.  
•
Ionescu, Adrian M.  
Date Issued

2021-01-01

Publisher

IEEE

Publisher place

New York

Published in
2021 21St International Conference On Solid-State Sensors, Actuators And Microsystems (Transducers)
ISBN of the book

978-0-7381-2562-6

Series title/Series vol.

International Solid-State Sensors Actuators and Microsystems Conference

Start page

373

End page

376

Subjects

metal-to-insulator transition

•

vanadium dioxide

•

laser illumination

•

tunable oscillator

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
NANOLAB  
NAM  
Event nameEvent placeEvent date
21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers)

ELECTR NETWORK

Jun 20-25, 2021

Available on Infoscience
November 6, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/182719
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