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Metal-cladding slab waveguide with millimeter scale thick guiding layer is applied to enhance Raman spectra of Copper phthalocyanine experimentally. Different from the usual strategy to create "hot spots" by designing sophisticated nanostructures with more and more narrow slits, we inclined to increase the distance between the two metallic cladding layers, i.e., the guiding layer thickness...
We present a novel reactor based on the ultrahigh order modes in a hollow-core metal cladding waveguide (HCMW). Aqueous Fe2+/Fe3+ salt solutions in the hollow-core act as the HCMW guiding layer. Light power is induced into the guiding layer using the free-space coupling technique. A series of enhanced power points, considered to be optical trapping points, are formed because of the excitation of the...
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