The quantum entropies of the Schwarzschild black hole arising from the axial and polar gravitational perturbations are investigated by using the ‘brick-wall mo
We apply a new method consisting of a coordinate transformation and two-step scheme to simulate numerically Zscan characteristics of a nonlinear medium. A compa
We develop 5.5-μm Inx Ga1-xAs/InyAl1-yAs strain-compensated quantum cascade lasers with InP and InGaAs cladding layers by using solid-source molecular-beam epi
Phase effect on the guided resonances in photonic crystal slabs is analysed. We present an analysis in the case of a mirror symmetric system and an asymmetric s
Determination of an ultra-low mean photon number is an important issue, either for precise optical measurement or understanding the interaction between individu