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RAMAN SPECTROSCOPY SYSTEM AND METHOD USING A SUBWAVELENGTH RESONANT GRATING FILTER
RAMAN SPECTROSCOPY SYSTEM AND METHOD USING A SUBWAVELENGTH RESONANT GRATING FILTER
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机译:亚波长共振光栅滤光片的拉曼光谱系统和方法
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摘要
A Raman spectroscopy system (600) is disclosed which includes a sub-wavelength responant. grating filter (508) and a photodiode with integrated sub-wavelength resonant grating filter are disclosed. The resonant grating filter (608) comprises an array of diffraction elements (104) having a periodic spacing that is less than the wavelength of radiation to be filtered and which are formed over a waveguide layer (110). The filter (608), which can reject a specific wavelength of radiation, can be placed between a Raman sample and a Raman detector (602) in order to filter radiation that is elastically scattered from the sample while transmitting other wavelengths. The wavelength rejected by the filter can be selected by tilting the filter (608) with respect to the radiation incident upon the filter.
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