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An Ultra-compact Nanophotonic Optical Modulator using Multi-State Topological Optimization

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arxiv 1712.02835 v1 pith:4GH6AAKR submitted 2017-11-19 physics.app-ph physics.optics

An Ultra-compact Nanophotonic Optical Modulator using Multi-State Topological Optimization

classification physics.app-ph physics.optics
keywords deviceextinctionopticalratiodesignedmagnitudemodulatormodulators
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Optical modulators are one of the most important elements of photonic circuits. Here, we designed, fabricated and characterized a nanophotonic all optical modulator (NOM) in silicon that is an order of magnitude smaller than any previous silicon modulators, and exhibits an extinction ratio and operable spectrum that are an order of magnitude larger than alternatives. Simulations indicate that our device can provide about 9.5dB extinction ratio with a bandwidth of 10nm, centered at 1.55um, corresponding to extinction ratio per device length of about 3.2dB/{\mu}m. Our device is fully compatible with standard complementary metal-oxide-semiconductor (CMOS) fabrication processes. The device is an example of a photonic device designed using multi-state topological optimization and will lead to a new class of ultra-compact and multi-functional active integrated-silicon devices.

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