Propagation of Light in Colloidal Crystals: Photonic Band Structure and Localization

由微球介质粒子制备的沃森胶体晶体可以满足可见光和近红外光的Bragg条件。光与光学晶格的相互作用产生了类似于原子晶体中的电子带结构的光子带结构。光谱学和干涉法对光子带结构的测定将从可见光扩展到近红外。除了继续研究这些晶体中的光子带结构及其对光子局域化的影响外，新的倡议包括研究(1)光子停止带中的杂质模式和(2)带结构效应与非线性光学性质的相互作用。以晶体管的发明为开端的过去50年的技术发展，只有对半导体材料的物理性质进行广泛而持续的研究，才有可能实现。未来的光子类似于今天的电子设备，其中光的作用取代了电子的作用，可能会维持这些技术进步在目前的速度。光在光子晶体中的行为将通过多种光学方法进行实验研究，以试图理解未来器件中光子传输和局部化的问题，以及它与当前器件中电子传输和局部化的关系

9510460 Watson Colloidal crystals, fabricated from microsphere dielectric particles, can be tailored to satisfy the Bragg condition for visible and near infrared light. The interaction of light with the optical lattice results in photonic band structure that is analogous to electronic band structure in atomic crystals. Spectroscopic and interferometric determination of photonic band structure will be extended from the visible to the near infrared. In addition to continued investigation of photonic band structure in theses crystals and its implications for photon localization, new initiatives include the study of (1) impurity modes in photonic stop bands and (2) interaction of band structure effects and nonlinear optical properties. %%% The technological developments of the past 50 years, initiated with the invention of the transistor, were possible only by the extensive and continued research of the physical properties of semiconductor materials. Future photonic analogs of today's electronic devices, where light action replaces that of the electron, may sustain these technological advancements at the current rate. The behavior of light in photonics crystals wil l be experimentally studied by numerous optical methods in an attempt to understand the issues of photon transport and localization in future devices, and its relationship to electron transport and localization in current devices.***