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David A. B. Miller - Abstracts
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Publication # 401

401. Takuo Tanemura, Krishna C. Balram, Dany-Sebastien Ly-Gagnon, Pierre Wahl, Justin S. White, Mark L. Brongersma, and David A. B. Miller, “Multiple-Wavelength Focusing of Surface Plasmons with a Nonperiodic Nanoslit Coupler,” Nano Lett. 11, 2693–2698 (2011)

A novel type of multiple-wavelength focusing plasmonic coupler based on a nonperiodic nanoslit array is designed and experimentally demonstrated.  An array of nanoslits patterned on a thin metal film is used to couple free-space light into surface plasmon polaritons (SPPs) and simultaneously focus different-wavelength SPPs into arbitrary predefined locations in the two-dimensional plane.  We design and fabricate a compact triplexer on a glass substrate with an integrated silicon photodetector.  The photocurrent spectra demonstrate that the incident light is effectively coupled to SPPs and routed into three different focal spots depending on the wavelength.  The proposed scheme provides a simple method of building wavelength-division multiplexing and spectral filtering elements, integrated with other plasmonic and optoelectronic devices.

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