Sub-diffraction negative and positive index modes in mid-infrared waveguides

Anthony J. Hoffman, Viktor A. Podolskiy, Deborah L. Sivco, Claire F. Gmachl

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We characterize a strongly anisotropic waveguide consisting of alternating 80 nm layers of n+-InGaAs and i-AlInAs on InP substrate. A strong increase in the transverse magnetic (TM) reflection at λ = 8.4 μm corresponds to a characteristic low-order mode cutoff for the left-handed waveguide. The subsequent decrease of TM reflection at λ= 11.5 μm represents the onset of right-handed no-cutoff light guiding. Good qualitative agreement is found when the experimental results are compared to finite element and transfer-matrix frequency domain simulations.

Original languageEnglish (US)
Pages (from-to)16404-16409
Number of pages6
JournalOptics Express
Issue number21
StatePublished - Oct 13 2008

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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