Photonic switching devices based on semiconductor nano-structures

Cathodoluminescence spectroscopy on lamellar metal and semiconductor gratings for nano-photonic devices

Cathodoluminescence spectra of lamellar gratings have Gaussian profiles centered at ~600 nm independent of grating amplitude (0.1 to 4.6 microns), grating period (0.1 to 20 microns), material (metal, semimetal, or semiconductor), or e-beam energy, but the band blue-shifts somewhat with increasing e-beam current. A periodic modulation with wavelength appears for the higher grating amplitudes due...

Tantalum/ Nitrogen and n-type WO3 semiconductor/FTO structures as a cathode for the future of nano devices

In the last decades an important number of research papers published on nano chip electrode and cathode electrochromic materials. Tantalum (Ta) with so high melting point can be as a good candidate for the future of nano chip devices. However, its surface has not enough trap centers and/or occupation states, so nitrogen ions exposed on Ta surafce, may solve this problem. For this purpose, in th...

Tunable thermal switching via DNA-based nano-devices.

DNA has a well-defined structural transition--the denaturation of its double-stranded form into two single strands--that strongly affects its thermal transport properties. We show that, according to a widely implemented model for DNA denaturation, one can engineer DNA 'heattronic' devices that have a rapidly increasing thermal conductance over a narrow temperature range across the denaturation ...

Photonic Materials and Devices

Our recent advances in solid-state optoelectronic materials and devices will be reviewed. In the area of glass optics, fabrication of novel microstructured and multi-core fibers and their use in realizing single mode lasers will be summarized. In organic and plastic optics, photorefractive polymers for 3D display applications and nonlinear optical polymers for high speed modulators in RF photon...

Photonic Nano-Structures For Water Quality Monitoring