Journal
ADVANCED OPTICAL MATERIALS
Volume 7, Issue 21, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.201900513
Keywords
inverse design; metamaterials; polarization beamsplitter; two-photon lithography
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Funding
- Office of Naval Research Young Investigator Program (ONR-YIP) Award [N00014-17-1-2425]
- Air Force Office of Scientific Research Award [FA9550 17-1-0348]
- ONR [N00014-16-1-3021, N00014-15-12935]
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This paper presents an inverse-designed 3D-printed polymer-based broadband free-form polarization beamsplitter in the near-infrared. A computational inverse-design method is used to design a thin free-form meta-grating to split normally incident light with different polarizations to different diffraction orders, one toward the left first order and one toward the right first order. The grating is 3D-printed using two-photon direct laser writing. Polarization splitting behavior is experimentally observed in the near-infrared region for wavelengths of 1.3 and 1.55 mu m, and with performance metrics close to the simulation values. The proposed platform combining inverse-design and 3D-printing can be extended to the design, fabrication, and integration of multiple broadband photonic structures to build devices with complex functionalities.
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