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Updated: Mar 28, 2026
11:10
Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
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Photo-Thermally Induced Current Switching in Vanadium-Dioxide-Based Devices Using CO2 Laser Pumping
Journal of Nanoscience and Nanotechnology
|January 5, 2016
Summary
Researchers demonstrated bidirectional laser triggering in vanadium dioxide (VO2) devices using a CO2 laser. This advancement enables precise control over VO2 thin film electronic states for potential applications in novel electronic devices.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Electrical Engineering
Background:
- Vanadium dioxide (VO2) exhibits a unique phase transition with significant changes in electrical resistance.
- Laser-induced switching offers a non-contact method for controlling material properties.
Purpose of the Study:
- To demonstrate and investigate bidirectional laser triggering in a two-terminal VO2 device.
- To analyze the transient responses of the device under pulsed laser excitation.
Main Methods:
- Utilized a CO2 laser as the illumination source for triggering.
- Fabricated a two-terminal planar device based on a highly resistive VO2 thin film.
- Investigated device performance by varying laser pulse width and repetition rate.
Main Results:
- Achieved bidirectional laser triggering in the VO2 device, controlling currents between 0 and 10 mA.
- Observed a high switching contrast of -3333 between off- and on-state currents.
- Measured transient response times, with rising and falling times of -39 ms and -21 ms, respectively, using 100 ms pulse widths.
Conclusions:
- CO2 laser triggering is effective for bidirectional control of VO2 devices.
- The demonstrated switching characteristics are promising for applications in laser-driven electronics.
- Further research can explore optimization of VO2 devices for enhanced performance and novel functionalities.
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