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Transmission of doughnut light through a bull's eye structure

We experimentally investigate the extraordinary optical transmission of doughnut light through a bull's eye structure. Since the intensity is vanished in the center of the beam, almost all the energy reaches the circular corrugations (not on the hole), excite surface plasmons which propagate through the hole and reradiate photons. The transmitted energy is about 57 times of the input energy on the hole area. It is also interesting that the transmitted light has a similar spatial shape with the input light although the diameter of the hole is much smaller than the wavelength of light.

preprint2009arXivOpen access
Lu-Lu WangXi-Feng RenRui YangGuang-Can GuoGuo-Ping Guo
physics.optics
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Open access5 authors1 topic
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Lu-Lu WangXi-Feng RenRui YangGuang-Can GuoGuo-Ping Guo

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