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Title: Light induced modulation instability of surfaces under intense illumination

We show that a flat surface of a polymer in rubber state illuminated with intense electromagnetic radiation is unstable with respect to periodic modulation. Initial periodic perturbation is amplified due to periodic thermal expansion of the material heated by radiation. Periodic heating is due to focusing-defocusing effects caused by the initial surface modulation. The surface modulation has a period longer than the excitation wavelength and does not require coherent light source. Therefore, it is not related to the well-known laser induced periodic structures on polymer surfaces but may contribute to their formation and to other phenomena of light-matter interaction.
Authors:
;  [1] ;  [2]
  1. Mathematical Institute, University of Oxford, Woodstock Road, Oxford OX2 6GG (United Kingdom)
  2. 4700 King Abdullah University of Science and Technology, Thuwal 23955-6900 (Saudi Arabia)
Publication Date:
OSTI Identifier:
22253731
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 25; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; EXCITATION; HEATING; ILLUMINANCE; LIGHT SOURCES; MODULATION; PERIODICITY; PERTURBATION THEORY; RUBBERS; THERMAL EXPANSION; VISIBLE RADIATION; WAVELENGTHS