title: Mid-infrared characterization of solution-processed As2S3 chalcogenide glass waveguides.
abstract: An etch-free and cost-effective deposition and patterning method to fabricate mid-infrared chalcogenide glass waveguides for chemical sensing applications is introduced. As(2)S(3) raised strip optical waveguides are produced by casting a liquid solution of As(2)S(3) glass in capillary channel molds formed by soft lithography. Mid-IR transmission is characterized by coupling the output of a quantum cascade (QC) laser (lambda = 4.8 microm) into the 40 microm wide by 10 microm thick multi-mode waveguides. Loss as low as 4.5 dB/cm is achieved using suitable substrate materials and post-processing. Optical absorption and surface roughness measurements indicate that the solution-processed films are of sufficient quality for optical devices and are promising for further development of waveguide-based mid-IR elements.
authors: Department of Electrical Engineering, Princeton University, Princeton, NJ 08544, USA.
authors: Candice
authors: C
authors: Tsay
authors: Elvis
authors: E
authors: Mujagić
authors: Christi K
authors: CK
authors: Madsen
authors: Claire F
authors: CF
authors: Gmachl
authors: Craig B
authors: CB
authors: Arnold