Ultrabroadband nonlinear optics in nanophotonic periodically poled lithium niobate waveguides

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

7 Scopus Citations
View graph of relations

Author(s)

  • Marc Jankowski
  • Carsten Langrock
  • Boris Desiatov
  • Alireza Marandi
  • Mian Zhang
  • Christopher R. Phillips
  • Marko Lončar
  • M. M. Fejer

Detail(s)

Original languageEnglish
Pages (from-to)40-46
Journal / PublicationOptica
Volume7
Issue number1
Online published7 Jan 2020
Publication statusPublished - Jan 2020

Abstract

Quasi-phase-matched interactions in waveguides with quadratic nonlinearities enable highly efficient nonlinear frequency conversion. In this paper, we demonstrate the first generation of devices that combine the dispersion engineering available in nanophotonic waveguides with quasi-phase-matched nonlinear interactions available in periodically poled lithium niobate (PPLN). This combination enables quasi-static interactions of femtosecond pulses, reducing the pulse energy requirements by several orders of magnitude compared to conventional devices, from picojoules to femtojoules. We experimentally demonstrate two effects associated with second harmonic generation (SHG). First, we observe efficient quasi-phase-matched SHG with <100 fJ of pulse energy. Second, in the limit of strong phase-mismatch, we observe spectral broadening of both harmonics with as little as 2 pJ of pulse energy. These results lay a foundation for a new class of nonlinear devices, in which coengineering of dispersion with quasi-phase-matching enables efficient nonlinear optics at the femtojoule level.

Citation Format(s)

Ultrabroadband nonlinear optics in nanophotonic periodically poled lithium niobate waveguides. / Jankowski, Marc; Langrock, Carsten; Desiatov, Boris; Marandi, Alireza; Wang, Cheng; Zhang, Mian; Phillips, Christopher R.; Lončar, Marko; Fejer, M. M.

In: Optica, Vol. 7, No. 1, 01.2020, p. 40-46.

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