Fink Y, Winn JN, Fan S, Chen C, Michel J, Joannopoulos JD, Thomas EL
Y. Fink, Department of Material Science and Engineering and Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. J. N. Winn, S. Fan, J. D. Joannopoulos, Department of Physics, Massachusetts Institute.
Science. 1998 Nov 27;282(5394):1679-82. doi: 10.1126/science.282.5394.1679.
A design criterion that permits truly omnidirectional reflectivity for all polarizations of incident light over a wide selectable range of frequencies was used in fabricating an all-dielectric omnidirectional reflector consisting of multilayer films. The reflector was simply constructed as a stack of nine alternating micrometer-thick layers of polystyrene and tellurium and demonstrates omnidirectional reflection over the wavelength range from 10 to 15 micrometers. Because the omnidirectionality criterion is general, it can be used to design omnidirectional reflectors in many frequency ranges of interest. Potential uses depend on the geometry of the system. For example, coating of an enclosure will result in an optical cavity. A hollow tube will produce a low-loss, broadband waveguide, whereas a planar film could be used as an efficient radiative heat barrier or collector in thermoelectric devices.
在制造由多层膜组成的全介质全向反射器时，采用了一种设计标准，该标准允许在很宽的可选择频率范围内对所有入射光偏振态实现真正的全向反射率。该反射器简单地构造为九层交替的微米厚的聚苯乙烯和碲层的堆叠，并在10至15微米的波长范围内展示出全向反射。由于全向性标准具有通用性，它可用于设计许多感兴趣频率范围内的全向反射器。潜在用途取决于系统的几何形状。例如，对一个外壳进行涂层会形成一个光学腔。一根空心管将产生一个低损耗的宽带波导，而一个平面薄膜可在热电器件中用作高效的辐射热障或集热器。
