2. Optical modulator by carrier depletion in silicon
2.1 Context
The refractive effects commonly used in optical modulators are the Pockels, Kerr and plasma effects. In a centro-symmetrical material like silicon, the Pockels effect does not exist, and the Kerr effect is very weak, even negligible. The most effective way of obtaining a rapid variation in the optical properties of silicon at optical telecommunications wavelengths (1.3-1.55 μm) is therefore to use the variation in refractive index by variation in free carrier density . Various solutions have...
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Optical modulator by carrier depletion in silicon
Quantum-Confined Stark-Effect Optical Modulator in Ge/SiGe Quantum-Well Structures
Bibliography
- (1) - KOEHL (S.), LIU (A.), PANICCIA (M.) - Integrated silicon photonics : harnessing the data explosion. - OSA Optics and Photonics New, 22, p. 24-39 (2011).
- (2) - LIU (A.) et al - A high speed silicon optical modulator based on a metal-oxide-semiconductor capacitor. - Nature, 427, p. 615-618 (2004). ...
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