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Research

Fundamental Optical Studies

  • Coupled-resonator-induced transparency/attenuation (classical analogs to EIT/EIA)
  • Coupled-mode IT/IA and corresponding pulse delay/advancement
  • IT/IA and corresponding pulse delay/advancement without mode coupling
  • Two methods for measuring the strength of cross-polarization coupling
  • Measurement of quality factor via phase shift or transient response

Sensing

  • Trace gas absorption sensing (external and internal)
  • Chemical absorption sensing in liquids (external and internal, laser and broadband)
  • Enhancement of absorption sensing with non-adiabatic tapered fiber coupling
  • Novel measure of thermal accommodation coefficients
  • Sensing changes in pH of solutions

Theoretical Modeling

  • Application of coupled mode theory to fiber-cavity coupling
  • Application of coupled mode theory to cavity-cavity coupling
  • Application of coupled mode theory to cross-polarization intermodal coupling
  • Cavity modeling of coupled-resonator response
  • Cavity modeling of transient response for quality factor determination
  • Cavity modeling of modulation effects
  • Field modeling for a non-adiabatic tapered fiber
  • Model for non-adiabatic fiber coupling sensing enhancement
  • Plasmonic nanorod/wire spectral response (and effects of nonuniform dielectric)

Microlaser

  • First room-temperature lasing of HgTe quantum dots (QDs)
  • QDs attached to microsphere by solution processing or dielectrophoresis
  • Ultralow lasing threshold (150 nW)
  • Effect of coating fiber with QDs
  • Plasmonic Near Field WGM Enhancement
  • Growth and characterization of high-aspect-ratio gold nanorods and wires
  • Plasmonic enhancement of evanescent coupling
  • Surface-enhanced Raman spectroscopy using WGMs
  • All-optical evanescent coupling control
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