Photocatalytic hydrogen evolution over semiconducting niobate nanosheets is synergistically improved by coexisting photochemically inactive additives of clay particles and sodium chloride without precise nanoscopic structural regulation. In addition, the Pt cocatalyst loaded on the clay particles works better than that photodeposited on the photocatalytic nanosheets.

The recent theoretical predictions and experimental observations of discrete surface solitons propagating along the interface between a one-or two-dimensional continuous medium and a one-or two-dimensional waveguide array are reviewed. These discrete solitons were found in second order (periodically poled lithium niobate) and third order nonlinear media, including AlGaAs, photorefractive media ...

A periodically poled lithium niobate (PPLN) waveguide-based single-pixel up-conversion infrared spectrometer was demonstrated. Sum-frequency generation between a 1.5-microm-band scanning pump laser and a 1.3-microm-band signal generated visible radiation which was detected by a silicon single-photon detector. The up-conversion spectrometer's sensitivity was two-orders-of-magnitude higher than t...

Second-order nonlinear optical properties of Mg-doped lithium niobate single crystals are quantitatively studied from the chemical bond viewpoint. The results show that the secondorder nonlinear optical response of Mg-doped LiNbO3 single crystals at 1079 nm decreases linearly with increasing Mg concentration in the crystal. This linear correlation is quantitatively evaluated in the current work.

Three-dimensional holograms were recorded in a cerium-doped, strontium barium niobate (SBN:75) photorefractive crystal. These holograms are shown to not degrade after more than one week of continuous readout and to reconstruct reproductions of the original object with an observable field of view of approximately 35 degrees.

Interfacial interactions between late transition metal/metal oxide nanoparticles and oxide supports impact catalytic activity and stability. Here, we report the use of isothermal titration calorimetry (ITC), electron microscopy and density functional theory (DFT) to explore periodic trends in the heats of nanoparticle-support interactions for late transition metal and metal oxide nanoparticles ...

The design of demultiplexers based on array waveguides is well known [1-5]. A new design based on the concept of variable waveguide depth was recently reported [6]. Since, the fabrication of channel waveguides on glass, silica or lithium niobate is mostly controlled by the lithography pattern and the subsequent fabrication process, it is difficult to implement the variable depth concept on thes...

Acoustically centrifuge and extract cells from blood samples using 152-Y-rotated lithium niobate spiral electrodes with an extraction syringe.

In this paper, we describe optical component and device technologies we have developed for next-generation photonic networks that achieve high tunability, high-speed transmission, and low power consumption. These include three-dimensional optical MEMS switches, acousto-opic tunable filters (AOTFs), lithium niobate optical modula-tors, and semiconductor lasers and optical amplifiers.