Modelling transient thermo-optic coupling in resonant nanophotonic structures

ORAL

Abstract

Thermo-optic effect plays an important role in active tuning of optical devices and systems. In a range of applications understanding of fast nanosecond scale switching and coupling between optical effects and heat transfer is important. However, such transient and non-equilibrium models are yet to be developed, particularly in the context of resonant nanostructures. Here, we develop a semi-analytical approach to examine thermo-optical coupling a nanoscale resonator under pulsed excitation. We make use of Green's function formulation for heat transfer to account for temperature dependent optical properties and their coupling to excitation pulses. Comparison with rigorous numerical simulations shows that our analytical model predicts well the dynamics of this transient highly coupled system. Additionally, we discuss applications of our model to design of thermally switchable metasurfaces and power limiters.

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Publication: 1 planned paper

Presenters

  • Pavel Shafirin

    Mechanical and Aerospace Engineering Department, University of California, Los Angeles, CA 90095, USA, University of California, Los Angeles

Authors

  • Pavel Shafirin

    Mechanical and Aerospace Engineering Department, University of California, Los Angeles, CA 90095, USA, University of California, Los Angeles

  • Pengli Feng

    University of California Los Angeles

  • Artur Davoyan

    Mechanical and Aerospace Engineering Department, University of California, Los Angeles, CA 90095, USA, University of California Los Angeles, University of California, Los ANgeles, University of California, Los Angeles