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Proceedings Paper

InP-based planar photonic crystals infiltrated with solid polymers and liquid crystals
Author(s): Rob van der Heijden; Charlotte Kjellander; Carl-Fredrik Carlström; Juri Snijders; Harm Kicken; Cees Bastiaansen; Dick Broer; Fouad Karouta; Richard Nötzel; Emile van der Drift; Huub Salemink
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Paper Abstract

The filling is reported of the air holes of an InP-based two-dimensional photonic crystal with solid polymer and with liquid crystal 5CB. The polymer filling is obtained by thermal polymerization of an infiltrated liquid monomer, trimethylolpropane triacrylate. The filling procedure for both the monomer and liquid crystal relies on the capillary action of the liquid inside the ~ 200 nm diameter and < 2.5 μm deep air holes. The solid polymer infiltration result was directly inspected by cross-sectional scanning electron microscopy. It was observed that the holes are fully filled to the bottom. The photonic crystals were optically characterized by transmission measurements around the 1.5 μm wavelength band both before and after infiltration. The observed high-frequency band edge shifts are consistent with close to 100% filling, for both the polymer and the liquid crystal. No differences were observed for filling under vacuum or ambient, indicating that the air diffuses efficiently through the liquid infiltrates, in agreement with estimates based on the capillary pressure rise.

Paper Details

Date Published: 30 August 2006
PDF: 8 pages
Proc. SPIE 6322, Tuning the Optic Response of Photonic Bandgap Structures III, 632205 (30 August 2006); doi: 10.1117/12.679358
Show Author Affiliations
Rob van der Heijden, COBRA Inter-University Research Institute (Netherlands)
Eindhoven Univ. of Technology (Netherlands)
Charlotte Kjellander, Eindhoven Univ. of Technology (Netherlands)
Carl-Fredrik Carlström, COBRA Inter-University Research Institute (Netherlands)
Eindhoven Univ. of Technology (Netherlands)
Juri Snijders, COBRA Inter-University Research Institute (Netherlands)
Eindhoven Univ. of Technology (Netherlands)
Harm Kicken, COBRA Inter-University Research Institute (Netherlands)
Eindhoven Univ. of Technology (Netherlands)
Cees Bastiaansen, Eindhoven Univ. of Technology (Netherlands)
Dick Broer, Eindhoven Univ. of Technology (Netherlands)
Fouad Karouta, COBRA Inter-University Research Institute (Netherlands)
Richard Nötzel, COBRA Inter-University Research Institute (Netherlands)
Eindhoven Univ. of Technology (Netherlands)
Emile van der Drift, Delft Univ. of Technology (Netherlands)
Huub Salemink, COBRA Inter-University Research Institute (Netherlands)
Eindhoven Univ. of Technology (Netherlands)
Delft Univ. of Technology (Netherlands)


Published in SPIE Proceedings Vol. 6322:
Tuning the Optic Response of Photonic Bandgap Structures III
Paul V. Braun; Sharon M. Weiss, Editor(s)

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