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Bios September 8, 2021

Srini Krishnamurthy

Senior Principal Scientist and Program Manager, Security and Survivability

Srini Krishnamurthy, Ph.D.,has conducted research on a variety of topics, including:

  • Dielectric metamaterials
  • Nonlinear absorption and high-intensity light propagation in semiconductors
  • Minority carrier and spin relaxation lifetimes in semiconductors
  • Modeling of infrared devices, avalanche photodiodes, resonant tunneling devices, power devices, spin field effect transistors, magnetic sensors, and CdTe solar cells
  • High-field transport in submicron devices,  and optical properties of semiconductors
  • Modeling MBE growth
  • Empirical and first-principles (LCAO) band structures, and optical, electrical, and electronics properties of semiconductor compounds, alloys, and superlattices

Krishnarmurthy holds bachelor’s and master’s degrees from the Regional College of Education, Mysore, India, and a Ph.D. in physics from the University of Cincinnati. He is an Alexander von Humboldt fellow (Max Planck Institute, Stuttgart 1992, Paul Drude Institute, Berlin, 2001) and a visiting professor of physics at the Indian Institute of Technology-Madras, Indian Institute of Science-Bangalore, and University of Illinois, Chicago.

He has authored or co-authored more than 100 published papers, a book chapter, and a patent.

Recent publications

more +
  • Thermal insulator transition induced by interface scattering

    We develop an effective medium model of thermal conductivity that accounts for both percolation and interface scattering.

  • Experimental Demonstration of a Broadband All-Dielectric Metamaterial Perfect Reflector

    Here we present the demonstration of a single-negative all-dielectric metamaterial that possesses peak reflectance over 99% and an average reflectance over 98% across a 200 nm wide bandwidth in the short-wavelength infrared region.

  • Fabrication of Highly Spin-Polarized Co2FeAl0.5Si0.5 Thin-Films

    Ferromagnetic Heusler Co2FeAl0.5Si0.5 epitaxial thin-films have been fabricated in the L21 structure with saturation magnetizations over 1200 emu/cm3.

  • Generalized Effective-Medium Theory for Metamaterials

    We present an effective-medium model for calculating the frequency-dependent effective permittivity ε(ω) and permeability μ(ω) of metamaterial composites containing spherical particles with arbitrary permittivity and permeability.

  • Perfect Dielectric-Metamaterial Reflector

    We exploit the Mie resonance in dielectric microparticles to design a single-negative metamaterial monolayer with near-unity reflectivity and negligible absorptivity.

  • Temperature- and Wavelength-dependent Two-photon and Free-carrier Absorption in GaAs, InP, GaInAs, and InAsP

    We present full-band structure calculations of temperature- and wavelength-dependent two-photon absorption coefficients and free-carrier absorption cross sections in GaAs, InP, and 0.92 eV-band gap Ga64In36As and InP60As40 alloys.

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