Sapphire

Liang, H.Y, I.I Smolyaninov, J Li, V Nagarajan, Ramamoorthy Ramesh, C.C Davis, and C.H Lee. "Electric field induced SHG in PZT thin films studied using near-field scanning optical microscopy." OSA Trends in Optics and Photonics Series. Vol. 88. Optical Society of American (OSA), 2003. 1685–1686.

Van Keuls, F.W, R.R Romanofsky, C.H Mueller, J.D Warner, C.L Canedy, Ramamoorthy Ramesh, and F.A Miranda. "Current status of thin film (Ba,Sr)TiO3 tunable microwave components for RF communications." Integrated Ferroelectrics. Vol. 34. 2001. 1605/165–1616/176.

Talyansky, V, R.D Vispute, Ramamoorthy Ramesh, R.P Sharma, T Venkatesan, Y.X Li, L.G Salamanca-Riba, M.C Wood, R.T Lareau, K.A Jones, and A.A Iliadis. "Fabrication and characterization of epitaxial AlN/TiN bilayers on sapphire." Thin Solid Films 323 (1998) 37–41.

Huang, Michael H, Samuel S Mao, Henning Feick, Haoquan Yan, Yiying Wu, Hannes Kind, Eicke R Weber, Richard E Russo, and Peidong Yang. "Room-temperature ultraviolet nanowire nanolasers." Science 292.5523 (2001) 1897–1899.