Two‐Photon Direct Laser Writing of Inverse‐Designed Free‐Form Near‐Infrared Polarization Beamsplitter. Issue 21 (23rd August 2019)

• Record Type: Journal Article
• Authors: Wei, Heming; Callewaert, Francois; Hadibrata, Wisnu; Velev, Vesselin; Liu, Zizhuo; Kumar, Prem; Aydin, Koray; Krishnaswamy, Sridhar
• Is Part Of: Advanced optical materials. Volume 7:Issue 21(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-08-23
• Subjects: inverse design -- metamaterials -- polarization beamsplitter -- two‐photon lithography; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.201900513
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract: 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 µm, 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. Abstract : A computational inverse‐designed 3D‐printed polymer‐based broadband free‐form polarization beamsplitter in the near‐infrared is presented. A computational inverse‐design algorithm is used to design a thin free‐form meta‐grating, which is 3D‐printed using two‐photon direct laser writing. Polarization splitting behavior is experimentally observed in the near‐infrared region, and with performance metrics close to the simulation values.