Nickel dithiolene dyes, noted for their intense long-wavelength electronic transitions, have been notoriously dificult molecules to model. This study has investigated the use of timedependent density functional theory (TDDFT) to model these dyes. The absorption spectra of an extensive set of near-infrared nickel dithiolene dyes have been evaluated for the first time using TDDFT. Bulk solvent ef...

Photoconductive properties of SrBi2Ta2O9 thin ®lms in the 250±400 nm wavelength range were investigated. The ®lms were deposited on Pt/SiO2/Si substrates using the Chemical Solution Deposition and were crystallized by conventional thermal annealing at 850 C. One sensitivity maximum was observed in the spectral distribution of the photoconductive signal and was attributed to band-to-band generat...

We report on a Monte Carlo method for modeling light transport phenomena in multilayer organic polymer light-emitting devices on plastic flexible substrates. The method allows modeling of Cartesian geometrical structures describing the fate of photons through multiple scattering events determined by the wavelength-dependent material optical properties. We apply the method to analyze the wavelen...

In this report, we investigate the influences of the small gap in whispering-gallery modes on energy coupling, resonance quality and frequency. Photon tunneling between an optical resonator and its light-delivery coupler depends strongly on the gap dimension which can vary from zero to size of an optical wavelength involved. An optimal gap dimension is found to exist for maximum energy coupling...

Recent progress in the development of room temperature, continuous wave, widely tunable, mode-hop-free mid-infrared external cavity quantum cascade laser (EC-QCL) spectroscopic sources is reported. A single mode tuning range of 155 cm−1 (∼ 8% of the center wavelength) with a maximum power of 11.1 mW and 182 cm−1 (∼ 15% of the center wavelength) with a maximum power of 50 mW was obtained for 5.3...

In this paper, we experimentally demonstrate simultaneous wavelength and orbital angular momentum (OAM) multiplexing/demultiplexing of 10 Gbit/s data streams using a new on-chip micro-component-tunable MEMS-based Fabry-Perot filter integrated with a spiral phase plate. In the experiment, two wavelengths, each of them carrying two channels with zero and nonzero OAMs, form four independent inform...

This paper proposes optical wavelength division multiplexed (WDM) networks with limited wavelength conversion that can eficiently support lightpaths (connections) between nodes. Each lightpath follows a route in the network and must be assigned a channel along each link in its route. The load A , , , of a set of lightpath requests is the maximum over al l links of the number of lightpaths that ...

A warm, relativistic fluid theory of a nonequilibrium, collisionless plasma is developed to analyze nonlinear plasma waves excited by intense drive beams. The maximum amplitude and wavelength are calculated for nonrelativistic plasma temperatures and arbitrary plasma wave phase velocities. The maximum amplitude is shown to increase in the presence of a laser field. These results set a limit to ...

background : due to rapid advances in modern technologies such as telecommunication technology, the world has witnessed an exponential growth in the use of digital handheld devices (e.g. smartphones and tablets). this drastic growth has resulted in increased global concerns about the safety of these devices. smartphones, tablets, laptops, and other digital screens emit high levels of short-wave...