journal article·2017-08-16Open access

Direct Electrospray Printing of Gradient Refractive Index Chalcogenide Glass Films

Spencer Novak, Pao Tai Lin, Cheng Li, Chatdanai Lumdee, Juejun Hu, Anuradha Agarwal, Pieter G. Kik, Weiwei Deng, Kathleen Richardson

Abstract

A spatially varying effective refractive index gradient using chalcogenide glass layers is printed on a silicon wafer using an optimized electrospray (ES) deposition process. Using solution-derived glass precursors, IR-transparent Ge 23 Sb 7 S 70 and As 40 S 60 glass films of programmed thickness are fabricated to yield a bilayer structure, resulting in an effective gradient refractive index (GRIN) film. Optical and compositional analysis tools confirm the optical and physical nature of the gradient in the resulting high-optical-quality films, demonstrating the power of direct printing of multimaterial structures compatible with planar photonic fabrication protocols. The potential application of such tailorable materials and structures as they relate to the enhancement of sensitivity in chalcogenide glass based planar chemical sensor device design is presented. This method, applicable to a broad cross section of glass compositions, shows promise in directly depositing GRIN films with tunable refractive index profiles for bulk and planar optical components and devices.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electrohydrodynamics and Fluid Dynamics · Phase-change materials and chalcogenides · Nonlinear Optical Materials Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Materials Science and Engineering, School of Engineering and Science, Clemson University, 161 Sirrine Hall Clemson, South Carolina 29634, United States

CREOL, The College of Optics and Photonics, University of Central Florida, 4304 Scorpius Street, Orlando, Florida 32816, United States

Department of Electrical and Computer Engineering and Department of Materials Science and Engineering, Texas A&M University, 3128 TAMU, 188 Bizzell Street, College Station, Texas 77843, United States

Microphotonics Center, Massachusetts Institute of Technology, Room 13-4118, 77 Masssachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States

Microphotonics Center and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Room 13-4126, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United States

Department of Mechanical Engineering, Virginia Polytechnic Institute and State University, 635 Price Fork Road, Blacksburg, Virginia 24061, United States

Funding

Division of Civil, Mechanical and Manufacturing Innovation · Defense Threat Reduction Agency

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