Plasmon-enhanced optical nonlinearity for femtosecond all-optical switching

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Kuidong Wang
  • Long Chen
  • Haijuan Zhang
  • Hui-Hsin Hsiao
  • Jie Chen

Detail(s)

Original languageEnglish
Article number181102
Journal / PublicationApplied Physics Letters
Volume111
Issue number18
Publication statusPublished - 30 Oct 2017
Externally publishedYes

Abstract

Ultrafast all-optical switching in metals can be an efficient way for high-speed active photonic devices. However, with the improvement in modulation speed, typically by reducing the optical switching pulse width from picoseconds to femtoseconds, the nonlinear optical response of the metal will decrease significantly, which hinders the realization of the sufficient modulation depth at femtosecond optical control. Here, by combining two optical nonlinear enhancement effects of surface plasmon polaritons, including their extreme sensitivity to refractive index change and their capability to induce strong localized optical fields, we have achieved an ∼50-times enhancement in the modulation depth simultaneously with a switching time of ∼75-fs. Such enhancement was found to be independent of the control intensity, which sets a basis for the future application of femtosecond switching at a minimum power.

Bibliographic Note

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Citation Format(s)

Plasmon-enhanced optical nonlinearity for femtosecond all-optical switching. / Wang, Kuidong; Chen, Long; Zhang, Haijuan; Hsiao, Hui-Hsin; Tsai, Din Ping; Chen, Jie.

In: Applied Physics Letters, Vol. 111, No. 18, 181102, 30.10.2017.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review