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A reflective optical switch in silicon-on-insulator (SOI) is proposed for routing traffic within a telecommunication system. The design utilizes a symmetric Y-branch (or 1 times 2) structure with curved rib waveguides and two modulation regions. Full containment of carriers is provided in each modulation region by using a thin oxide barrier. The analysis showed a crosstalk of -20 dB is achievable...
Total internal reflection optical switches structures are well known. However, previously reported switches based upon carrier injection have suffered from the diffusion of carriers within the guiding layer leading to inefficient reflection. While some attempts have been made to restrict the diffusion of carriers in devices fabricated in materials other than silicon, carrier diffusion has still been...
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