A photonic crystal structure that illustrates cloaking with use of a normally incident optical Gaussian beam. From the left, the beam begins to diverge as it travels towards the center; it then bends around the cloaked object and re-forms as another beam on the opposite side.
From the article:
Transformation Optics with Photonic Band Gap MediaYaroslav A. Urzhumov and David R. Smith
Phys. Rev. Lett. 105, 163901 (2010)
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