A Narayanaswamy

AE Fomin

AI Volokitin

C Otey

C Shen

D Ganta

D Navarro-Urrios

DG Cahill

E Rousseau

F Vollmer

G Murugan

GR Elliott

H Rokhsari

J Yang

JJ Mahony

L He

LL Martin

LL Martín

PT Tsilingiris

T Carmon

X Zhang

Scientific Reports

AbstractThis work reports the dynamical thermal behavior of lasing microspheres placed on a dielectric substrate while they are homogeneously heated-up by the top-pump laser used to excite the active medium. The lasing modes are collected in the far-field and their temporal spectral traces show characteristic lifetimes of about 2 ms. The latter values scale with the microsphere radius and are independent of the pump power in the studied range. Finite-Element Method simulations reproduce the experimental results, revealing that thermal dynamics is dominated by heat dissipated towards the substrate through the medium surrounding the contact point. The characteristic system scale regarding thermal transport is of few hundreds of nanometers, thus enabling an effective toy model for investigating heat conduction in non-continuum gaseous media and near-field radiative energy transfer.</jats:p

Far-field characterization of the thermal dynamics in lasing microspheres

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