Quantum-cascade laser integrated with a metal-dielectric-metal-based plasmonic antenna

Dibyendu Dey*, John Kohoutek, Ryan M. Gelfand, Alireza Bonakdar, Hooman Mohseni

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Optical nanoantennas are capable of enhancing the near-field intensity and confining optical energy within a small spot size. We report a novel metal-dielectric-metal coupled-nanorods antenna integrated on the facet of a quantumcascade laser. Finite-difference time-domain simulations showed that, for dielectric thicknesses in the range from 10 to 30 nm, peak optical intensity at the top of the antenna gap is 4000 times greater than the incident field intensity. This is 4 times higher enhancement compared to a coupled metal antenna. The antenna is fabricated using focused ion-beam milling and measured using modified scanning probe microscopy. Such a device has potential applications in building mid-IR biosensors.

Original languageEnglish (US)
Pages (from-to)2783-2785
Number of pages3
JournalOptics Letters
Issue number16
StatePublished - Aug 15 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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