High-speed all-optical thresholding via carrier lifetime tunability

Aashu Jha, Chaoran Huang, Thomas Ferreira De Lima, Paul R. Prucnal

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


We theoretically study the effect of free-carrier lifetime on processing speed and strength of nonlinearity, pertaining to our all-optical thresholder. We find that optimal device performance necessitates tuning lifetime while optimizing for both speed and nonlinearity. We also experimentally demonstrate device processing speed improvement from 400 Mbps to 2.5 Gbps by incorporating PN-junction mediated free-carrier lifetime tuning mechanism. Our study on the significance of free-carrier lifetime is universally applicable to any optical signal processing system reliant on silicon photonic nonlinearities.

Original languageEnglish (US)
Pages (from-to)2287-2290
Number of pages4
JournalOptics Letters
Issue number8
StatePublished - Apr 15 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'High-speed all-optical thresholding via carrier lifetime tunability'. Together they form a unique fingerprint.

Cite this