Nonlinear optical properties of integrated GeSbS chalcogenide waveguides
Author(s)
Serna, Samuel; Lin, Hongtao; Alonso-Ramos, Carlos; Yadav, Anupama; Le Roux, Xavier; Richardson, Kathleen; Cassan, Eric; Dubreuil, Nicolas; Hu, Juejun; Vivien, Laurent; ... Show more Show less
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© 2018 Chinese Laser Press. In this paper, we report the experimental characterization of highly nonlinear GeSbS chalcogenide glass waveguides. We used a single-beam characterization protocol that accounts for the magnitude and sign of the real and imaginary parts of the third-order nonlinear susceptibility of integrated Ge23Sb7S70 (GeSbS) chalcogenide glass waveguides in the near-infrared wavelength range at λ = 1580 nm. We measured a waveguide nonlinear parameter of 7.0 ± 0.7 W−1 · m−1, which corresponds to a nonlinear refractive index of n2 = (0.93 ± 0.08) × 10−18 m2/W, comparable to that of silicon, but with an 80 times lower two-photon absorption coefficient βTPA= (0.010 ± 0.003) cm/GW, accompanied with linear propagation losses as low as 0.5 dB/cm. The outstanding linear and nonlinear properties of GeSbS, with a measured nonlinear figure of merit FOMTPA= 6.0 ± 1.4 at λ = 1580 nm, ultimately make it one of the most promising integrated platforms for the realization of nonlinear functionalities.
Date issued
2018Department
Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
Photonics Research
Publisher
The Optical Society