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Updated: May 9, 2026

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Thermo-optical response of photonic crystal cavities operating in the visible spectral range
Janik Wolters1, Niko Nikolay, Max Schoengen
1Nano-Optics, Institute of Physics, Humboldt-Universität zu Berlin, Newtonstraße 15, Berlin, Germany. janik.wolters@physik.hu-berlin.de
Abstract:
In this paper we study thermo-optical effects in gallium phosphite photonic crystal cavities in the visible range. By measuring the shift of narrow resonances, we derive the temperature dependency of the local refractive index of gallium phosphide in an attoliter volume over a temperature range between 5 and 300 K at a wavelength of about 605 nm. Additionally, the potential of photonic crystal cavities for thermo-optical switching of visible light is investigated. As an example we demonstrate thermo-optical switching with 13 dB contrast.
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