Polarization dependence of quantum-confined Stark effect in Ge/SiGe quantum well planar waveguides |
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Authors: | Chaisakul Papichaya Marris-Morini Delphine Isella Giovanni Chrastina Daniel Le Roux Xavier Edmond Samson Coudevylle Jean-René Cassan Eric Vivien Laurent |
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Institution: | Institut d'Electronique Fondamentale, Universite′ Paris-Sud, CNRS UMR 8622, Batiment 220, 91405 Orsay Cedex, France. |
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Abstract: | We report room-temperature quantum-confined Stark effect in Ge/SiGe multiple quantum wells (MQWs) with light propagating parallel to the plane of the Ge/SiGe MQWs for applications in integrated photonics. Planar waveguides embedded in a p-i-n diode are fabricated in order to investigate the absorption spectra at different reverse bias voltages from optical transmission measurements for both TE and TM polarizations. Polarization dependence of the absorption spectra of the Ge/SiGe MQWs is clearly observed. The planar waveguides exhibit a high extinction ratio and low insertion loss over a wide spectral range for TE polarization. |
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