| Title |
CO2 Laser-Triggered Reversible 55mA Current Switching in Electronic Device Based on VO2 Thin Film |
| Authors |
Jihoon Kim ; Yong Wook Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2018.32.6.049 |
| Keywords |
Vanadium dioxide ; Thin film ; Metal-insulator transition ; Photothermal effect ; Switching |
| Abstract |
A laser-triggered reversible current switching was demonstrated in electronic device based on vanadium dioxide (VO2) thin film by using a CO2 laser. The VO2 thin film used in the two-terminal electronic device was grown on a sapphire (Al2O3) substrate by a pulsed laser deposition method. A simple series electrical circuit was constructed to investigate the current-voltage properties of the VO2-based electronic device and reversible current switching operations were examined with various bias voltages. Laser-triggered reversible current switching of up to 55mA was achieved by focused laser beam illumination directly onto the VO2 device. The transient response of the currents flowing through the device was investigated when the laser illuminates the device at repetition rates of up to 2.0Hz. A switching contrast between off-state and on-state currents was calculated as ∼10976 with a off-state current of ∼5.01μA. |