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Performance enhancement of terahertz metamaterials on ultrathin substrates for sensing applications

  • Hu Tao
  • , Andrew C. Strikwerda
  • , Mengkun Liu
  • , Jessica P. Mondia
  • , Evren Ekmekci
  • , Kebin Fan
  • , David L. Kaplan
  • , Willie J. Padilla
  • , Xin Zhang
  • , Richard D. Averitt
  • , Fiorenzo G. Omenetto
  • Tufts University
  • Boston University

Research output: Contribution to journalArticlepeer-review

202 Scopus citations

Abstract

We design, fabricate, and characterize split-ring resonator (SRR) based planar terahertz metamaterials (MMs) on ultrathin silicon nitride substrates for biosensing applications. Proof-of-principle demonstration of increased sensitivity in thin substrate SRR-MMs is shown by detection of doped and undoped protein thin films (silk fibroin) of various thicknesses and by monitoring transmission changes using terahertz time-domain spectroscopy. SRR-MMs fabricated on thin film substrates show significantly better performance than identical SRR-MMs fabricated on bulk silicon substrates paving the way for improved biological and chemical sensing applications.

Original languageEnglish
Article number261909
JournalApplied Physics Letters
Volume97
Issue number26
DOIs
StatePublished - Dec 27 2010

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