Ultra-low power consumption tunable photonic crystal nanobeam cavity based on suspended ridge waveguides

Zhang, Yuguang; Shi, Yaocheng

doi:10.1109/inec.2016.7589347

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2017

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“…Then the tuning efficiency η, proportional to ΔT/P, is expected to increase to 3.75 nm/mW for the optimized structure. Moreover, the TO tuning efficiency can also be significantly increased by using free-standing structures [7,27].…”

Section: Discussionmentioning

confidence: 99%

Ultra-compact tunable silicon nanobeam cavity with an energy-efficient graphene micro-heater

Xu¹,

Qiu²,

Yang³

et al. 2017

Opt. Express

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We propose and experimentally demonstrate an ultra-compact silicon photonic crystal nanobeam (PCN) cavity with an energy-efficient graphene micro-heater. Owing to the PCN cavity with an ultra-small optical mode volume of 0.145 µm, the light-matter interaction is greatly enhanced and the thermo-optic (TO) tuning efficiency is increased. The TO tuning efficiency is measured to be as high as 1.5 nm/mW, which can be further increased to 3.75 nm/mW based on numerical simulations with an optimized structure. The time constants with a rise time constant of τ = 1.11 μs and a fall time constant of τ = 1.47 μs are obtained in the experiment.

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Section: Discussionmentioning

confidence: 99%