[2] Y. Amnon, Y. Pochi. Optical Waves in Crystals: Propagation and Control of Laser Radiation(2002).
[21] H. Hu, R. Ricken, W. Sohler. Lithium niobate photonic wires. Opt. Express, 17, 24261(2009).
[24] H. Hui, R. Ricken, W. Sohler. Etching of lithium niobate: from RIDGE waveguides to photonic crystal structures. European Conference on Integrated Optics(2008).