Fabrication and characterization of high-contrast mid-infrared GeTe₄ channel waveguides.

Autor: Mittal V, Aghajani A, Carpenter LG, Gates JC, Butement J, Smith PG, Wilkinson JS, Murugan GS
Jazyk: angličtina
Zdroj: Optics letters [Opt Lett] 2015 May 01; Vol. 40 (9), pp. 2016-9.
DOI: 10.1364/OL.40.002016
Abstrakt: We report the fabrication and characterization of high index contrast (Δn≈0.9) GeTe4 channel waveguides on ZnSe substrate for evanescent-field-based biosensing applications in the mid-IR spectral region. GeTe4 films were deposited by RF sputtering and characterized for their structure, composition, transparency, and dispersion. The lift-off technique was used to pattern the waveguide channels. Waveguiding from 2.5-3.7 and 6.4-7.5 μm was demonstrated, and mode intensity profile and estimated propagation losses are given for the 3.5 μm wavelength.
Databáze: MEDLINE