Graphitic carbon nitride nanosheet (g-C3N4-NS) has layered structure similar with graphene nanosheet and presents unusual physicochemical properties due to the s-triazine fragments. But their electronic and electrochemical applications are limited by the relatively poor conductivity. The current work provides the first example that atomically thick g-C3N4-NSs are the ideal candidate as the acti...

Photocatalyst mediated photoelectrochemical processes can make use of the photogenerated electrons and holes onsite for photocatalytic redox reactions, and enable the harness and conversion of solar energy into chemical energy, in analogy to natural photosynthesis. However, the photocatalysts available to date are limited by either poor efficiency in the visible light range or insufficient phot...

We study percolation in a random resistor-diode network on the simple cubic lattice. Here the occupied bonds joining nearest-neighbour sites may be either resistor-like, transmitting information or connectivity in either direction along a bond, or diode-like, transmitting in only one direction. We consider a model in which there exist both positive diodes which transmit in the fx, + y or + z di...

Experiments have been performed with a 100-kJ pulse-forming network (PFN) to characterize the transient behavior of semiconductor diodes serving as capacitor-protecting devices. In addition to the experiments, computer techniques are used to illustrate and predict the dynamic behavior ofPFN diodes. From analyses of the data collected, it was determined that in a PFN under specific loading condi...

Although the concept of using optical rectenna for harvesting solar energy was first introduced four decades ago, only recently has it invited a surge of interest, with dozens of laboratories around the world working on various aspects of the technology. An optical rectenna couples an ultra-high-speed diode to a submicron antenna so that the incoming radiation received by the antenna is rectifi...

I analyze the accuracy of the FOS pipeline wavelength calibration for the FOS/RD detector with the G570H grating. I use observations of arc spectra and external targets that I obtained in the context of studies of galactic nuclei, complemented with an observation of the planetary nebula NGC 6833 obtained by the FOS Instrument Science Team. The combined data were obtained in five visits spread o...

1 M. Cada acknowledges support from Natural Sciences and Engineering Research Council (NSERC) and from Nortel Technology, Inc., both of Canada AbstractA stability analysis of bistable laser diodes, which gives a first analytical explanation of the recently observed high-speed bistable switching and self-pulsation, is presented by introducing two key parameters. It is shown that switching and se...

Avalanche photodiodes (APDs) with thin avalanche regions have shown low excess noise characteristics and high gain-bandwidth products, so they are suited for long-haul optical communications. In this work, we investigated how carrier injection profile affects the avalanche gain and excess noise factors of Al0.85Ga0.15As0.56Sb0.44 (lattice-matched to InP substrates) p-i-n and n-i-p diodes with t...

The realization of phononic computing is held hostage by the lack of high-performance thermal devices. Here, it is shown through theoretical analysis and molecular dynamics simulations that unprecedented thermal rectification factors (as large as 1.20) can be achieved utilizing the phase-dependent thermal conductivity of polyethylene nanofibers. More importantly, such high thermal rectification...

Optical emission fluctuations from a GaAs and a Ga(AsP) luminescent diode, as well as from a GaAs junction laser, have been measured. Correlation is observed between optical emission noide and forward current noise of the diode, suggesting that carrier transitions responsible for both effects are the same. Diodes in which considerable carrier recombination occurs in the space charge region exhi...