Optical Nonlinear Properties and Carrier Plasma Effect at Low Carrier Density in Silicon Wire Waveguides

Ultrafast dynamics of amplitude and phase in a silicon wire waveguide are measured by a heterodyne pump probe technique at a wavelength of 1.55 μm. We determined the two-photon absorption coefficient and nonlinear refractive index to be β TPA = 0.43 cm/GW and n 2 = 2.0 × 10 18 m 2 /W, respectively....

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2011-09, Vol.47 (9), p.1208-1213
Main Authors: Suda, S., Ogasawara, T., Shoji, Y., Kintaka, K., Kawashima, H., Hasama, T., Ishikawa, H.
Format: Article
Language:English
Subjects:
Carrier density
Carrier plasma dispersion
Nonlinear optics
Nonlinearity
optical nonlinear effect
Optical properties
Optical waveguides
Probes
Quantum electronics
Silicon
silicon waveguides
Ultrafast optics
Waveguides
Wavelengths
Wire
Wires
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Summary:Ultrafast dynamics of amplitude and phase in a silicon wire waveguide are measured by a heterodyne pump probe technique at a wavelength of 1.55 μm. We determined the two-photon absorption coefficient and nonlinear refractive index to be β TPA = 0.43 cm/GW and n 2 = 2.0 × 10 18 m 2 /W, respectively. A theoretical analysis indicates that the index change due to the carrier plasma effect is linear to the carrier density when it is low as in the case of optical injection.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2011.2160714