We present an experimental study of the formation of two-dimensional optical lattices of titanium dioxide particles. The titanium dioxide particles, with an average size of 0.24 μm and a high refractive index of 2.6–2.9 in the visible region, were trapped in the antinodes of a standing-wave field. The shortest lattice constant reached so far is 0.8 μm. A corresponding diffraction pattern of the lattice was observed. This is an effort to create a photonic crystal with a lattice constant extended to visible and near-infrared wavelength scales.
© 1995 Optical Society of America
Original Manuscript: December 23, 1994
Published: May 1, 1995
Wei Hu, Hongqiang Li, Bingying Cheng, Junhui Yang, Zhaolin Li, Jiren Xu, and Daozhong Zhang, "Planar optical lattice of TiO2 particles," Opt. Lett. 20, 964-966 (1995)