The effects of the dielectric constants of high/low refractive films making up one-dimensional photonic crystal structure and filling ratio between thickness of high reflective film and crystal period on the bandwidth of forbidden band gap were analyzed.

Effect of translation group symmetry on phononic band gaps studied by supercell calculation;

Influence of scatterers′ tropism on the band gaps of two-dimension phononic crystal;

Elastic wave band gap and scattering in phononic crystal;

Precise Bandgap Voltage Reference and Current Reference;

Design of low temperature drift bandgap voltage reference and driving circuit;

A method to estimate the strain state of SiGe/Si by measuring the bandgap;

It is concluded that compared with simple lattices, the band-gap of complex lattices.

First principles and pseudopotential approaches have been used to investigate band structures and pressure dependence of the band-gaps of ordered zincblende Ge_(50)Sn_(50)alloy up to 9 GPa.

In this paper, on basis of the analysis of the foregoing band-gap voltage reference ,a self-start low-voltage low-power band-gap voltage reference is proposed in which TSMC 0.

Optical parameters of GaInP were measured by using null ellipsometric spectrum method in the visible light region at room temperature The dependencies of refractive index and absorption coefficient for three samples on the energy of photons were obtained, and the result was analyzed and discussed The positions of energy gap of three samples were give

The energy gap Eg and the value of energy Eg+Δ 0 were obtained.

Study of two dimensional photonic band gap structure;

Change of band gap structure of 1-D photonic crystal of periodic positive-negative index structure at angular incidence;

With the boundary conditions satisfied by the electromagnetic fields in the interface between the crystal and the clad,the characteristic equation to describe the band gap structure is deduced.