Today, electron leakage in InP-based separate confinement laser diode has a serious effect on device performance. Control of electron leakage current is the aim of many studies in semiconductor laser industry. In this study, for the first time, a new asymmetric waveguide structure with n-interlayer for a 1.325 μm InP-based laser diode with InGaAsP multi-quantum well is proposed and theoreticall...

VLSI compatible optical waveguides on silicon are currently of particular interest in order to integrate optical elements onto silicon chips, and for possible replacements of electrical cross-chip/inter-core interconnects. Here we present simulation and experimental verification of a hybrid plasmon/dielectric, single-mode, single-polarization waveguide for silicon-on-insulator wafers. Its fabri...

We performed large-scale numerical simulations on non-equilibrium superconducting dynamics after a neutron capture at the superconducting transition edge in MgB2 by solving the time-dependent Ginzburg-Landau equation coupled with the Maxwell and the heat diffusion equations. The simulations were executed under the current-biased condition in order to explain experimental results carried out in ...

Recently, local probes used in optical experiments added a new dimension to the study of the optical properties of small particles lying on a surface. Until now, several theoretical frameworks, developed to understand the interaction of optical fields with mesoscopic and nanoscopic objects, emphasized mainly the prediction of the electric near-field distributions generated by these structures. ...

We describe recently proposed light-powered nanomachines and all-optical self-adaptive optomechanical circuits that rely on the interplay of resonantly-enhanced optical forces and the manipulation of optical resonances by mechanical degrees of freedom in nanophotonic structures [1]. This new class of devices facilitates resonantly tailored optomechanical potentials, enabling positional control ...

Future optical data transmission modules will require the integration of more than 10,000 x 10,000 input and output channels to increase data transmission rates and capacity. This level of integration, which greatly exceeds that of a conventional diffraction-limited photonic integrated circuit, will require the use of waveguides with a mode confinement below the diffraction limit, and also the ...

We report on the numerical analysis of the electrical and optical properties of current-injected III-nitride based vertical-cavity surface-emitting lasers (VCSELs) with three types of current confinement schemes: the conventional planar-indium tin oxide (ITO) type, the AlN-buried type without ITO, and the hybrid type. The proposed hybrid structure, which combines an ITO layer and an intracavity...

From the view point of both science and technology, it would be interesting and useful to examine the optical properties of isolated silicon nanocrystals (nc-Si) embedded in SiO2 matrix. A good understanding to optical properties of the nc-Si is definitely important to both the quantum physics and the applications especially in optoelectronic and photonic devices. In this work, spectroscopic el...

Needs in more-efficient visible light sources based on quantum wells (QWs) requires the diversification of traditional optoelectronics’ materials as well as development of the cost-effective approaches for reliable quantum confinement engineering. Interdiffusion approach has a great potential to become a simple method for controlling the optical properties of QWs and diminishing the quantum con...