Abstract:We present hollow waveguide arrays acting like quarter-and half-wave plates. Approximately 2000 × 2500 individual rectangular hollow waveguides filled with air and surrounded by a gold cladding form the basis of the wave plates. The hollow waveguides fabricated by combining femtosecond 3D direct laser writing with electroplating have sub-micron dimensions of less than 500 nm in the cladding area. Both wave plates show the characteristic properties of quarter-and half-wave plates converting a linear polarized i… Show more
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