禁带

Both the optical absorption coefficient and bandgap decrease with increasing in film thickness.

光吸收系数以及禁带宽度均随薄膜厚度的增加而下降。

The optical absorption spectrum of the film has been measured and the bandgap of the film has been also determined.

我们测试了此薄膜的光吸收特性，并得到了它的禁带宽度。

TiO_2 is a very important wide bandgap semiconductor, which mainly include three crystal structures. Anatase and rutile are tetragonal. Brookite is orthorhombic.

TiO_2是一种重要的宽禁带半导体材料，主要有3种晶型，即金红石、锐钛矿和板钛矿结构，其中金红石和锐钛矿属四方晶系，板钛矿属正交晶系。

It is found that the confiner the electric field, the sharper the peak width. The different confined states correspond to the different oscillation modes, which can be well described by the resonant tunneling effect used in the semiconductor quantum well structures.

B：非完全约束光子量子阱结构的束缚态出现在阱光子晶体的禁带区域，并且不同束缚态对应不同的光子量子阱能级，不同的量子阱能级有不同程度的光场约束，光场约束在阱光子晶体中的越多，对应的透射极大的半峰宽越小。

The effects of thepreparation conditions on the structures and performances of the sol samples were studied,followed by investigating the formation mechanism of the anatase TiO_2 particles. Thecharacterization of the as-obtained sol-gel samples shows that the TiO_2 and P-doped TiO_2sols have anatase crystal structures, and the latter has higher crystallizability than theformer.

通过对TiO_2溶胶进行微观结构表征，发现：TiO_2溶胶和掺磷TiO_2溶胶均呈锐钛矿晶型，颗粒呈梭形，分散性较好，后者的结晶度更高；两者在可见光区均有较大的光吸收，最大吸收波长为550nm，磷的加入使得TiO_2的禁带宽度变大。

In this paper, we adopt two types of model of a three-level atom in a double-band photonic crystal described respectively by isotropic and anisotropic dispersion relations at the band edges.

在本文中，我们采用双带光子晶体中的两种三能级原子模型，它们分别由禁带边缘的各向同性和各向异性的色散关系描述。

Based on Long Theory, the dispersive equation of the structure is given out.

在实验测量的基础上，分析了禁带宽度和深度与电容之间的关系。

Silicon carbide is a promising semiconductor with wide band-gap, highsaturation electron drift velocity, high thermal conductivity and high breakdownelectric field.

碳化硅是一种具有宽禁带、高电子饱和漂移速度、高的热导率以及高的临界击穿电场等优异特性的新型半导体材料。

SiC is a very promising material for high temperature, high power, high frequency, and radiation application because of its superior properties such as wide band gap, high critical breakdown field, high thermal conductivity and high saturation electron drift velocity.

SiC材料具有宽禁带、高临界击穿电场、高热导率、高载流子饱和漂移速度等优良特性，这些特性决定了它在高温、大功率、高频和抗辐照等方面的有着广泛的应用前景。

These parameters include energy gap, electron affinity and build-up potential etc.

这些典型参数包括：禁带宽度、电子亲和能、内建势等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。