상세정보
학술지
20 mA Bidirectional Laser Triggering in Planar Devices based on Vanadium Dioxide Thin Films using CO2 Laser
- 발행일
- 201506
- 출처
- Optics Express, v.23 no.11, pp.14234-14244
- ISSN
- 1094-4087
- 출판사
- Optical Society of America(OSA)
- 협약과제
- 15ZE1100, ETRI 창의연구실 사업, 정성영
- 초록
- By utilizing a CO2 laser centered at ~10.6 μm as an optical stimulus, we demonstrated bidirectional laser triggering in a two-terminal planar device based on a highly resistive vanadium dioxide (VO2) thin film. The break-over voltage of the VO2-based device was measured as large as ~294.8 V, which resulted from the high resistivity of insulating VO2 grains comprising the thin film and the large electrode separation of the device. The bidirectional current switching of up to 20 mA was achieved by harnessing the dramatic resistance variation of the device photo-thermally induced by the laser illumination. The transient responses of laser-triggered currents were also analyzed when laser pulses excited the device at a variety of pulse widths and repetition rates. In the transient responses, a maximum switching contrast between off- and on-state currents was measured as ~7067 with an off-state current of ~2.83 μA, and rising and falling times were measured as ~30 and ~16 ms, respectively, for 100 ms laser pulses.
- KSP 제안 키워드
- Break-over voltage, CO2 laser, Electrode separation, High resistivity, Laser illumination, Laser pulse, Planar device, Thermally induced, Transient response, Vanadium dioxide thin film, current switching