The natural sedimentation method combining with the isothermal heating evaporation induced self-assembly is presented to fabricate three-dimensional (3D) colloidal crystals in the curved cavity of the fiber end face. A-50 \mu m-deep cavity is etched by hydrofluoric acid. The colloidal crystals are characterized by optical and scanning electron microscopy. A 1380-nm stop band is observed by measuring their transmission spectra at normal incidence by an optical spectrum analyzer (OSA).
© 2010 Chinese Optics Letters
Wenhua Guo, Ming Wang, Ping Yu, and Qing Liu, "Fabrication of 3D colloidal photonic crystals in cavity of optical fiber end face," Chin. Opt. Lett. 8, 515-516 (2010)