Photonic Band Structures for Optoelectronic Applications

wpc2bvpz快递10cpi ？x x x, N x 6 x @ 8；HP LaserJet系列II HPLASEII。我们拟开展光子带隙结构（PBSs）的基础物理和应用方面的理论研究。我们简要描述了拟研究的方向：1。光子带隙材料的设计和改进：在过去两年中，光子带隙材料的设计取得了相当大的进展。到目前为止，仅研究了无损双组分介电复合材料作为光子带隙材料。研究的重点是寻找具有正确几何形状的结构。我们将在我们的研究中讨论以下主题：现实考虑因素，如损耗有限尺寸效应，介电常数的频率依赖性，不完全周期性等，对光子带结构和本征模的影响。使用替代材料的可能性，例如超导体、具有强磁性或压电特性的材料以及非线性介电材料等。这些材料的电磁响应可以在不同程度上得到控制，这使得设计具有光学特性的PBSs成为可能，这些特性可以通过施加电场或磁场，或通过弹性变形或其他方式来控制。2. QED：计算PBS本征模的一个重要动机是可能用于腔QED计算。原子场的相互作用不仅通过光子态的密度，而且通过与模相关的电磁场的空间分布。原子场相互作用的另一个来源是通过一个额外的项来表示原子与h) 0*0*0*介质中诱导极化电荷的相互作用。透彻理解这些机制对于设计带有PBSs的光电器件至关重要。周期超导结构有望产生新的QED效应，这些效应在单个腔中的原子实验中没有观察到或微不足道。通过控制带边的位置，我们期望可以控制原子的辐射特性。这将为研究腔QED提供一种新的方法；该系统可用作Q开关，产生相干辐射脉冲。＊＊＊

WPC 2 B V P Z Courier 10cpi ? x x x , N x 6 X @ 8 ; X @ HP LaserJet Series II HPLASEII.PRS x @ , t 0 OpX @ #| x 2 W C #| x 9301075 Haus We propose to carry out theoretical investigators regarding the fundamental physics and applications of photonic bandgap structures (PBSs). We briefly describe the proposed research directions: 1. Design and refinement of photonic bandgap materials: Considerable progress has been made in the past two years in the design of PBSs. So far, only lossless two component dielectric composites have been investigated for use as photonic bandgap materials. The research has focused on finding the structure with the right geometry. We will address the following topics in our research: The effects of realistic considerations, such as losses finite size effects, frequency dependence of the dielectric constant, imperfect periodicity, etc., on the photonic band structure and the eigenmodes. Possibility of using alternate materials, such as superconductors, materials with strong magnetic or piezoelectric properties, and nonlinear dielectric materials, to name a few. The electromagnetic response of these materials can be controlled to varying degrees, making possible the design of PBSs with optical properties that can be controlled by means of an applied electric or magnetic field, or by elastic deformations or by other means. 2. QED: An important motivation for the calculation of the eigenmodes of a PBS is for possible use in cavity QED calculations. The atom field interaction is not only through the density of photon states, but also through the spatial distribution of electromagnetic fields associated with the mode. Another source of atom field interaction is through an additional term that represents the interaction of the atom with the induced polarization charges in the h) 0*0*0* medium. A thorough understanding of these mechanisms is essential in designing optoelectronic devices with PBSs. Periodic superconducting structures can be expected to yield novel QED effects that are not observed or are insignificant in experiments with atoms in a single cavity. By controlling the position of the band edge, we expect that the radiation properties of the atoms can be controlled altered. This will give provide a new means of investigating cavity QED; the system could be used as a Q swithch for generating pulses of coherent radiation. ***