Plasmonic all-optical tunable wavelength shifter

B. Fluegel, A. Mascarenhas, D. W. Snoke, L. N. Pfeiffer, K. West

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


At present, wavelength-division-multiplexed fibre lines routinely operate at 10Gbits1 per channel. The transition from static-path networks to true all-optical networks encompassing many nodes, in which channels are addeddropped and efficiently reassigned, will require improved tools for all-optical wavelength shifting. Specifically, one must be able to shift the carrier wavelength (frequency) of an optical data signal over tens of nanometres (a THz range) without the bottleneck of electrical conversion. Popular approaches to this problem make use of the nonlinear interaction between two wavelengths within a semiconductor optical amplifier whereas more novel methods invoke terahertz-frequency electro-optic modulation and polaritons. Here we outline the principles and demonstrate the use of optically excited plasmons as a tunable frequency source that can be mixed with a laser frequency through Raman scattering. The scheme is all-optical and enables dynamical control of the output carrier wavelength simply by varying the power of a control laser.

Original languageEnglish (US)
Pages (from-to)701-703
Number of pages3
JournalNature Photonics
Issue number12
StatePublished - Dec 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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