Work

Optical quality ZnSe films and low loss waveguides on Si substrates for mid-infrared applications

Year: 2017

Type: article

Abstract: Zinc Selenide (ZnSe) is a promising mid-infrared waveguide material with high refractive index and wide transparency. Optical quality ZnSe thin films were deposited on silicon substrates by RF sputtering and thermal evaporation, and characterized and compared for material and optical properties. Evaporated films were found to be denser and smoother than sputtered films. Rib waveguides were fabricated from these films and evaporated films exhibited losses as low as 0.6 dB/cm at wavelengths between 2.5 µm and 3.7 µm. The films were also used as isolation/lower cladding layers on Si with GeTe4 as the waveguide core and propagation losses were determined in this wavelength range.

Source: Optical Materials Express

DOI: 10.1364/ome.7.000712

Authors: Vinita Mittal, Neil P. Sessions, James S. Wilkinson, Ganapathy Senthil Murugan

Institution: University of Southampton

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,843

Funders: European Commission, Seventh Framework Programme, Engineering and Physical Sciences Research Council