Journal of Physical Chemistry & Biophysics
Open Access
ISSN: 2161-0398
+44 1478 350008
ISSN: 2161-0398
+44 1478 350008
Casey M Schwarz1, Chris N Grabill1, Benn Gleason1,2, Spencer Novak1,2, Anna M Lewis1, Gerald D Richardson1, Clara Rivero-Baleine4, Kathleen A Richardson1, Alexe Pogrebnyakov3, Theresa S Mayer3 and Stephen M Kuebler1
Scientific Tracks Abstracts: J Phys Chem Biophys
Arsenic trisulfide (As2S3) is a chalcogenide (ChG) material with excellent infrared (IR) transparency (620 nm to 11 μm) and large nonlinear refractive indices. These properties directly relate to commercial and industrial applications including sensors, photonic waveguides, and acousto-optics. Thermal deposition fragments the bulk As2S3 glass into molecular clusters that can then be deposited as photosensitive thin films. Multi-photon exposure can be used to photo-pattern these films by cross-linking the material into a network solid. Placing the photo-patterned cross-linked material into a polar-solvent removes the unexposed material leaving behind a structure that is a negative-tone replica of the photo-pattern. Nano-structured arrays that were photo-patterned in single layered As2S3 films through multi-photon direct laser writing (DLW) resulted in the production of nano-beads as a consequence of a standing wave effect. To overcome this effect, an anti-reflective (AR) layer of arsenic triselenide (As2Se3) was thermally deposited between the silicon substrate and the As2S3 layer, creating a multi-layered film.In this work, the chemical composition and refractive index of the unexposed and photo-exposed multi-layered film was examined through Raman spectroscopy and near infrared ellipsometry. Nano-structured arrays were photo-patterned in the multi-layered film and the resulting structure, morphology, and chemical composition were characterized, compared to results from the single layered film, and correlated with the conditions of the thermal deposition, patterned irradiation, and etch processing. Large homogenous nano-structured arrays were fabricated and optically characterized.
Casey M Schwarz completed her PhD in Physics at UCF in 2012 studying the radiation effects of semiconductor transport properties using electron beam induced current and Cathodoluminescence characterization techniques. She joined the Kuebler research group at UCF in 2013 a Post-doctoral researcher where she is currently investigating the processing and properties of novel materials for future optical device applications. Her work in this area has led to her presenting and publishing her work at the 2014 and 2015 Photonics West SPIE conference in San Francisco, writing a chapter review on micro-fabrication, and generating the science for two papers in progress.