由于光子回路中光子器件尺寸和光波长相当，所以衍射现象比较明显，据此可以实现类似于电路中的趋肤效应。根据光信号在介质中的传播方程和薛定谔方程的相似性，设计了一种多层柱状结构光波导，高频光信号沿着波导表层传播，其内部存在信号盲区。仿真计算表明：盲区随信号频率的增大而增大。盲区的边界通常位于多层介质的内分界面上。较高的折射率梯度和类似于引力势的折射率分布有利于形成信号盲区。该结果有助于隐身衣或新型光子回路的设计。

Because the size of photonic device is close to the size of optical wavelength，photonic circuit shows significant diffractive characteristics, which can be used to design photonic devices with novel function. To realize the similar “skin effect” of electronic circuit, we utilize the similarity between “Schrdinger Equation” and the wave function in inhomogeneous medium, and design a type of multi-layer cylindrical optical waveguide with high gradient refractive index and pseudo-gravity potential index distribution. Simulation shows high frequency signal propagate in the surface layer, and signal blind area (“cavity”) exists in the inner part of the waveguide. The size of the cavity varies with the wavelength of the light. The boundary of the cavity locates near the inner-boundary of the layers. Longer wave is less affected by the discontinuity, and can penetrate further into the inner material. The domain of the cavity decreases with the wavelength. This result may have significance for the design of “perfect invisible cloak” and new type photonic circuit.