DIRECTION-SELECTIVE INTERFEROMETRIC OPTICAL FILTER

    公开(公告)号:US20170276849A1

    公开(公告)日:2017-09-28

    申请号:US15517213

    申请日:2015-10-07

    CPC classification number: G02B5/288 G01J3/26 G02B1/005 G02B5/284 G02B26/001

    Abstract: A direction-selective interferometric optical filter for spectrometric devices, at least includes an arrangement of two layered one-dimensional photonic structures. Each of the two structures contains a defect layer, and each photonic structure has a dispersion function in the energy momentum space (E, kx, ky), wherein kx and ky are momentum components of transmitted photons of the photonic structures for a defined energy (frequency/wavelength) E in the energy momentum space. Both photonic structures have opposite interfaces which are at a plane-parallel distance from one another. In this case, the dispersion functions of both photonic structures cross or intersect in the energy momentum space and produce a cut set of rays of waves on the surfaces of the dispersion functions at a particular energy, wherein a ray of waves contains waves selectively chosen through the filter at an angle, while other waves are reflected by the filter at other angles.

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