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9 November 2016 Light-activated nanoheaters with programmable time-dependent response (Conference Presentation)
Michelle L. Povinelli, Roshni Biswas, Ahmed Morsy
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Proceedings Volume 9920, Active Photonic Materials VIII; 992008 (2016) https://doi.org/10.1117/12.2238265
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States
Abstract
We design nanopatterned, all-dielectric structures that heat up suddenly when illuminated by a laser. The delay time for heating can be programmed into the structure by adjusting the spacing and size of holes in the pattern. The key operating principle is excitation of an absorptive, electromagnetic resonance in the structure by laser light, combined with a thermooptic response. Shifting of the resonance in time leads to a sudden increase in absorptive heating when the resonance aligns with the laser wavelength. We use optical transmission measurements to characterize the heating behavior in both air and water and demonstrate controlled microbubble formation.
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Michelle L. Povinelli, Roshni Biswas, and Ahmed Morsy "Light-activated nanoheaters with programmable time-dependent response (Conference Presentation)", Proc. SPIE 9920, Active Photonic Materials VIII, 992008 (9 November 2016); https://doi.org/10.1117/12.2238265
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KEYWORDS
Electromagnetism
Nanostructures
Optical testing
Structural design
Thermal optics
Transmittance
Current controlled current source
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