Open AccessSequential and selective localized optical heating in water via on-chip dielectric nanopatterning
Author(s) -
Ayman T A Morsy,
Roshni Biswas,
Michelle L. Povinelli
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.017820
Subject(s) - microscale chemistry , materials science , dielectric , optoelectronics , laser , silicon , optics , chip , lab on a chip , nanotechnology , microfluidics , mathematics education , mathematics , physics , electrical engineering , engineering
We study the use of nanopatterned silicon membranes to obtain optically-induced heating in water. We show that by varying the detuning between an absorptive optical resonance of the patterned membrane and an illumination laser, both the magnitude and response time of the temperature rise can be controlled. This allows for either sequential or selective heating of different patterned areas on chip. We obtain a steady-state temperature of approximately 100 °C for a 805.5nm CW laser power density of 66 µW/μm 2 and observe microbubble formation. The ability to spatially and temporally control temperature on the microscale should enable the study of heat-induced effects in a variety of chemical and biological lab-on-chip applications.