近轴全场隐身
Paraxial full-field cloaking
摘要：
我们通过将其扩展到全光场，完成了之前提出的“近轴”（小角度）射线光学掩盖形式主义[Choi和Howell，Opt. Express 22，29465（2014）]。全向性是唯一的宽松的参数，可以被认为是一个理想的，宽带，场斗篷。我们表明，均匀厚度的各向同性板，适当设计的折射率和色散，可以匹配的相位在整个可见光谱。我们的研究结果支持宽带与全向隐身的基本限制，并提供见解时，可能需要各向异性。
英文摘要：
We complete the `paraxial' (small-angle) ray optics cloaking formalism presented previously [Choi and Howell, Opt. Express 22, 29465 (2014)], by extending it to the full-field of light. Omnidirectionality is then the only relaxed parameter of what may be considered an ideal, broadband, field cloak. We show that an isotropic plate of uniform thickness, with appropriately designed refractive index and dispersion, can match the phase over the whole visible spectrum. Our results support the fundamental limits on cloaking for broadband vs. omnidirectionality, and provide insights into when anisotropy may be required.
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