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Bidirectional Current Triggering in Two-Terminal Planar Device Based on Vanadium Dioxide Thin Film Using 1550nm Laser Diode

1550nm 레이저 다이오드를 이용한 바나듐 이산화물 박막 기반 2단자 평면형 소자에서의 양방향 전류 트리거링

Lee, Yong Wook
이용욱

  • Received : 2014.12.14
  • Accepted : 2015.01.27
  • Published : 2015.04.30

Abstract

While most switching devices are based on PN junctions, a single layer can realize a switching device in the case of vanadium dioxide($VO_2$) thin films. In this paper, bidirectional current triggering(switching) is demonstrated in a two-terminal planar device based on a $VO_2$ thin film by illuminating the film with an infrared laser at 1550nm. To begin with, a two-terminal planar device, which had a $30{\mu}m$-wide $VO_2$ conducting layer and an electrode separation of $10{\mu}m$, was fabricated. A specific bias voltage range for stable bidirectional laser triggering was experimentally obtained by measuring the current-voltage characteristics of the fabricated device in a current-controlled mode. Then, by constructing a test circuit composed of the device, a standard resistor, and a DC voltage source, connected in series, the transient response of laser-triggered current and its response time were investigated with a DC bias voltage, included in the above specific bias voltage range, applied to the device. In the test circuit with a DC voltage source of 3.35V and a $10{\Omega}$ resistor, bidirectional laser triggering could be realized with a maximum on-state current of 15mA and a switching contrast of ~78.95.

Keywords

Vanadium Dioxide;Thin Film;Planar Device;Phase Transition;Laser Triggering

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Cited by

  1. Bidirectional Current Triggering in Two-Terminal Planar Device Based on Highly Resistive Vanadium Dioxide Thin Film Using 966nm Near Infrared Laser vol.29, pp.11, 2015, https://doi.org/10.5207/JIEIE.2015.29.11.028
  2. Laser vol.30, pp.1, 2016, https://doi.org/10.5207/JIEIE.2016.30.1.001

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)