Bridging dielectric fluids by light: A ray optics approach R. D. Schroll, E. Brasselet, W. W. Zhang and J. -P. Delville Eur. Phys. J. E, 26 4 (2008) 405-409 Published online: 20 June 2008 DOI: 10.1140/epje/i2008-10336-1