Description: 通过测量光学薄膜的反射率曲线反演其光学常数，包括厚度与折射率-By measuring the optical thin film reflectivity curve inversion of its optical constants, including the thickness and refractive index Platform: |
Size: 3072 |
Author:罗震岳 |
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Description: It was proposed that perfect invisibility cloaks can be constructed for hiding objects from electromagnetic
illumination (Pendry et al., Science 312, p. 1780). The cylindrical cloaks experimentally
demonstrated (Schurig et al., Science 314, p. 997) and theoretically proposed (Cai et al., Nat. Photon.
1, p. 224) have however simplified material parameters in order to facilitate easier realization
as well as to avoid infinities in optical constants. Here we show that the cylindrical cloaks with
simplified material parameters inherently allow the zeroth-order cylindrical wave to pass through
the cloak as if the cloak is made of a homogeneous isotropic medium, and thus visible. To all
high-order cylindrical waves, our numerical simulation suggests that the simplified cloak inherits
some properties of the ideal cloak, but finite scatterings exist. Platform: |
Size: 221184 |
Author:Jason |
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Description: 根据耦合膜理论，和光纤在空间的总功率为1，计算得到不同包层模式的归一化常量-According to the coupling film theory, and the total power of optical fiber in the space of 1, calculated with different cladding modes of the normalization constants Platform: |
Size: 2048 |
Author:乔天 |
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