Study of nonlinear effects and self-heating in silicon microring  resonator including SRH model for carrier recombination

Novarese, Marco; Romero-García, Sebastián; Adams, Don; Bovington, Jock; Gioannini, Mariangela

doi:10.1117/12.2607247

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…We note that level [2], [6], [10]. The model we developed in [2], [10] is also fairly accurate in following the experimental results with the carrier lifetimes being close to the experimental values.…”

Section: Resultssupporting

confidence: 70%

“…The model [2] well reproduces the shift of resonant wavelength and transmission coefficient as function of the bus power. Discrepancy at power higher than 1.6 mW are due to the self-oscillations of the ring [10]. To experimentally retrieve the recovery dynamics of the free carrier densities, we have performed pump-probe measurements; results are in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…To understand the experimental results, we employ the model we developed in [2] to simulate the CW nonlinear response of silicon MRR. The model in [2] can be extended to the time domain [10] to simulate the nonlinear response of the ring after the pump pulse. FC recombination is modeled by trap-assisted Shockley-Read-Hall (SRH) rate equations [2].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamics of Free Carrier Absorption and Refractive Index Dispersion in Si and Si/PolySi Microrings

Novarese

Romero-García²,

Bovington³

et al. 2023

IEEE Photon. Technol. Lett.

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We report pump-probe measurements of time resolved optical transmission spectra of Si and Si/poly-Si microrings after high free carrier densities have been generated by twophoton absorption of the pump pulse. From measurements, we can extract the recovery dynamics of free carrier absorption, refractive index dispersion, generated free carriers and finally the effective initial free carrier lifetimes. The method is validated by comparing modelling and simulations with measurements; the obtained results are in very good agreement with what predicted by the Shockley-Read-Hall recombination model for trap assisted recombination. We also propose a method for determining the empirical relations for free carrier absorption and refractive index dispersion in poly-Si waveguides.

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