Vectorial fluorescence emission from microsphere coupled to gold mirror
Advanced Optical Materials 6 (22), 1801025
Abstract:
Entanglement between living bacteria and quantized light witnessed by Rabi splitting
Journal of Physics Communications IOP Publishing 2:10 (2018) 101001
Proton tunnelling in hydrogen bonds and its implications in an induced-fit model of enzyme catalysis
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 474:2218 (2018) ARTN 20180037
Mitigating the photocurrent persistence of single ZnO nanowires for low noise photodetection applications.
Nanotechnology (2018)
Abstract:
In this work, we investigate the optoelectronic properties of zinc oxide (ZnO) nanowires, which are good candidates for applications based on integrated optics. Single ZnO nanowire photodetectors were fabricated with ohmic contacts. By taking current transient measurements in different atmospheres (oxygen, air, vac- uum and argon), and at various temperatures, we point out the importance of surface effects on the electrical behaviour. Results confirm that oxygen chemisorption is responsible for the existence of a high photocon- ductive gain in these devices, and for the first time a two step process in the photocurrent rise transient is reported. A maximum gain of G = 7.8 × 10^7 is achieved. However, under certain conditions, the persistence of the photocurrent can last up to several hours and as such may prevent the device from operating at useful rates. From a knowledge of the photocurrent response mechanisms, we establish a method to restore the pho- todetector to its initial state, with very low dark current, by applying an appropriate gate voltage sequence. This advances the state of the art for these detectors towards commercial applications.Photocurrent persistence reduction in ZnO nanowire photodetectors (Conference Presentation)
SPIE, the international society for optics and photonics (2018) 9