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OPTICAL FILTER AND SPECTROMETER INCLUDING SUB-WAVELENGTH DOUBLE GRATING STRUCTURE, AND OPTICAL APPARATUS INCLUDING THE OPTICAL FILTER AND SPECTROMETER
OPTICAL FILTER AND SPECTROMETER INCLUDING SUB-WAVELENGTH DOUBLE GRATING STRUCTURE, AND OPTICAL APPARATUS INCLUDING THE OPTICAL FILTER AND SPECTROMETER
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机译:光学滤波器和光谱仪包括子波长双光栅结构,以及包括滤光器和光谱仪的光学设备
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摘要
An optical filter may include a first reflector and a second reflector. The first reflector may include a plurality of first gratings having a first sub-wavelength dimension and being arranged to recur at a first interval in a first direction. The second reflector may be spaced apart from the first reflector and include a plurality of second gratings having a second sub-wavelength dimension and arranged to recur at a second interval in a direction parallel to the first direction. The first reflector and the second reflector may include different materials or different geometric structures from each other. Accordingly, it is easy to adjust the transmission wavelength characteristics of the optical filter.
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