The work includes theoretical analysis of heat-up of an optical near- field probe with laser radiation passing through it. Stationary solution is found regarding the probe heating due to partial absorption of the radiation by the metal film and linear heat exchange between the probe and its environment. Temperature space distribution down the tapered part of the probe is found. The threshold power of continuous radiation leading to melting of the probe is estimated.
Vera V. Kurpas,
Mikhail N. Libenson,
George A. Martsinovsky,
"Laser heat-up of near-field probe tip", Proc. SPIE 2384, Scanning Probe Microscopies III, (30 March 1995); doi: 10.1117/12.205920; https://doi.org/10.1117/12.205920