Ultra-miniature broadband polarization beam splitter based on two-slit interference
A polarization beam splitter and double-slit interference technology, applied in the field of nanophotonics
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[0022] The present invention will be further described through the embodiments below in conjunction with the accompanying drawings.
[0023] like figure 1 As shown, the ultra-small broadband polarizing beam splitter based on double-slit interference in this embodiment includes: a metal film 3, a first slit 1, a second slit 2, and a dielectric film 4; wherein, the thickness of the metal film is t M , set the first slit and the second slit on the metal film, the distance between them is d, and the width is w 1 and w 2 ;The dielectric film covers the metal film, the first slit and the second slit, and the thickness of the dielectric film is t I ; Above the dielectric film is air, thus forming a composite waveguide of air-dielectric-metal. The material of the metal film is gold or silver; the material of the dielectric film is one of polymer, crystal, glass, semiconductor and liquid film.
[0024] The air-dielectric-metal composite waveguide supports both TM and TE waveguide mod...
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