Dynamic Fano-like resonances in erbium-doped whispering-gallery-mode microresonators

Fuchuan Lei, Bo Peng, Şahin Kaya Özdemir, Gui Lu Long, Lan Yang

Research output: Contribution to journalArticlepeer-review

60 Scopus citations


We report Fano-like asymmetric resonances modulated by optical gain in a whispering-gallery-mode resonator fabricated from erbium-doped silica. A time-dependent gain profile leads to dynamically varying sharp asymmetric resonances with features similar to Fano resonances. Depending on the scan speed of the frequency of the probe laser and the pump-probe power ratio, transmission spectra of the active microcavity exhibit a resonance dip, a resonance peak, or a Fano-like resonance.

Original languageEnglish (US)
Article number101112
JournalApplied Physics Letters
Issue number10
StatePublished - Sep 8 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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