Integration of magnetooptical waveguides onto a III-V semiconductor surface
- 7 August 2002
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 14 (2) , 167-169
- https://doi.org/10.1109/68.980494
Abstract
Optical waveguides fabricated on a yttrium iron garnet (YIG) substrate are integrated onto a semiconductor surface by using ridge waveguides patterned onto a prefabricated recess in the YIG surface. The recess separates the waveguides from the semiconductor substrate with an air-gap. This structure makes it possible to avoid coupling light within the YIG waveguides into the semiconductor substrate which has a higher refractive index. The excess optical loss due to the coupling can be as low as /spl les/0.1 dB/cm with a 1-/spl mu/m-wide air-gap. The calculated coupling loss is confirmed by comparing the guided TE and TM modes.Keywords
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