The fabrication of photonic band gap materials with a two-dimensional defect

• Published in: Applied physics letters Vol. 82; no. 21; pp. 3764 - 3766
• Main Authors: Zhao, Yuxia, Wostyn, Kurt, de Schaetzen, Gaetan, Clays, Koen, Hellemans, Louis, Persoons, Andre, Szekeres, Marta, Schoonheydt, Robert A.
• Format: Journal Article
• Language: English
• Published: 26-05-2003
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.1578713

Colloidal crystals with three-dimensional periodicities in the refractive index have a photonic band gap (PBG) in which electromagnetic waves are forbidden. We present a method to fabricate stacked colloidal crystals containing a two-dimensional defect as a middle layer by combining vertical deposition method with the Langmuir–Blodgett (LB) technique. The defect layer introduces an impurity mode within the optical stop band, which is observed as a defect peak (pass band) in the optical density spectrum. The result shows that the combination of vertical deposition with LB technique provides a way for introducing defect modes in PBG materials.