Kim Jihoon, Choi Sungwook, Lee Seul-Lee, Kim Min Seok, Kim Do Kyung, Kim Bong-Jun, Lee Yong Wook
School of Electrical Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Korea.
Interdisciplinary Program of Biomedical Mechanical & Electrical Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Korea.
J Nanosci Nanotechnol. 2020 Jan 1;20(1):351-358. doi: 10.1166/jnn.2020.17221.
Here we report bidirectional current triggering (BCT) with a high repetition rate, achieved in a twoterminal planar device based on a vanadium dioxide (VO₂) thin film by using a laser diode with a center wavelength of 976 nm as an excitation source. The VO₂ thin film was grown on a sapphire (Al₂O₃) substrate using a pulsed laser deposition method, and the two-terminal planar device was fabricated by sawing the grown film into microscale unit devices, each of which was then attached onto a printed circuit board. Current triggering was performed by controlling the output power of the laser beam incident on the device surface. The proposed device allows stable current triggering operation even with laser pulses of higher repetition rate and lower energy because it is designed to have low heat capacity and thermal conductivity. Experimental results showed that a BCT of up to 30 mA was achieved at the maximum repetition rate of 8.0 Hz. The switching contrast between off- and on-state currents was calculated to be ~7295, and average rising and falling times of the current triggering were measured to be ~18.3 and ~22.5 ms, respectively.
在此，我们报告了在基于二氧化钒（VO₂）薄膜的双端平面器件中实现的高重复率双向电流触发（BCT），该器件使用中心波长为976 nm的激光二极管作为激发源。VO₂薄膜采用脉冲激光沉积法生长在蓝宝石（Al₂O₃）衬底上，通过将生长的薄膜锯切成微尺度单元器件来制造双端平面器件，然后将每个单元器件附着到印刷电路板上。通过控制入射到器件表面的激光束的输出功率来进行电流触发。所提出的器件即使在具有更高重复率和更低能量的激光脉冲下也能实现稳定的电流触发操作，因为它被设计为具有低热容量和热导率。实验结果表明，在8.0 Hz的最大重复率下实现了高达30 mA的BCT。关态电流与开态电流之间的开关对比度计算为约7295，电流触发的平均上升和下降时间分别测量为约18.3 ms和约22.5 ms。
