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Proceedings Paper

Monolithic integration of chalcogenide glass/iron garnet waveguides and resonators for on-chip nonreciprocal photonic devices
Author(s): Lei Bi; Juejun Hu; Gerald F. Dionne; Lionel Kimerling; C. A. Ross
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Paper Abstract

We report monolithic integration of chalcogenide glass(ChG)/iron garnet waveguides and racetrack resonators on silicon for on-chip nonreciprocal photonic devices applications. Using a two step growth strategy, we successfully integrated phase pure Bi0.8Y2.2Fe5O12 (Bi0.8YIG), Bi1.8Y1.2Fe5O12 (Bi1.8YIG) and Ce1Y2Fe5O12 (CeYIG) polycrystalline thin films on silicon with low fabrication thermal budgets. Strip-loaded ChG/Iron garnet waveguides and racetrack resonators were fabricated by thermal evaporation and lift off. The waveguide loss was systematically characterized by cutback and paperclip methods. For the first time, the optical transmission loss of polycrystalline Bi or Ce doped garnets were evaluated at communication wavelengths in waveguides. Polycrystalline CeYIG films show a saturation Faraday rotation of -830deg/cm and transmission loss of ~40dB/cm at 1550nm, which is promising for on-chip nonreciprocal photonic device applications. Such waveguide structures were successfully incorporated in GeS2/Bi0.8YIG racetrack resonators which show well defined resonance spectrum at near infrared wavelength. The nonreciprocal phase shift (NRPS) and device figure of merit of the ChG/Garnet waveguides were simulated by numerical methods. Possible improvements and applications of such devices for integrated optical isolator applications are analyzed and discussed.

Paper Details

Date Published: 17 January 2011
PDF: 10 pages
Proc. SPIE 7941, Integrated Optics: Devices, Materials, and Technologies XV, 794105 (17 January 2011); doi: 10.1117/12.875184
Show Author Affiliations
Lei Bi, Massachusetts Institute of Technology (United States)
Juejun Hu, Massachusetts Institute of Technology (United States)
Gerald F. Dionne, Massachusetts Institute of Technology (United States)
Lionel Kimerling, Massachusetts Institute of Technology (United States)
C. A. Ross, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 7941:
Integrated Optics: Devices, Materials, and Technologies XV
Jean Emmanuel Broquin; Gualtiero Nunzi Conti, Editor(s)

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