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Laser-Assisted Control of Electrical Oscillation in VO2 Thin Films Grown by Pulsed Laser Deposition
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- Authors
- Bong-Jun Kim, Giwan Seo, Jeongyong Choi, Hyun-Tak Kim, Yong Wook Lee
- Issue Date
- 2012-11
- Citation
- Japanese Journal of Applied Physics, v.51, no.10, pp.1-5
- ISSN
- 0021-4922
- Publisher
- Japan Society of Applied Physics (JSAP),
- Language
- English
- Type
- Journal Article
- Abstract
- By adjusting an optical power of an infrared laser illuminating a vanadium dioxide (VO 2) thin film, we have demonstrated a laser-assisted control of a field-induced electrical oscillation (FIEO) in a two-terminal device based on a VO 2 thin film fabricated by pulsed laser deposition. Through the control of the laser illumination power, the FIEO could be switched on or off with a fixed low DC bias voltage applied to the device that was connected in series with a standard resistor, and its frequency could be linearly tuned until the extinguishment of the oscillation. The tuning sensitivity of the oscillation frequency was measured as ~21.28 kHz/mW, showing good linearity with an R-squared value of 0.99288. In addition, the peak-to-peak amplitudes of the oscillation waveforms could also be linearly controlled by adjusting the illumination power. © 2012 The Japan Society of Applied Physics.
- KSP Keywords
- Applied physics, Assisted control, DC bias voltage, Electrical oscillation, Field-induced, Infrared laser, Laser illumination, Laser-assisted, Optical power, Oscillation Frequency, Pulsed-laser deposition(PLD)