Cox K.C., M.A. Norcia, J.M. Weiner, J.G. Bohnet, and J.K. Thompson, Applied Physics Letters 105, 261102 (2014).
Bohnet J.G., K.C. Cox, M.A. Norcia, J.M. Weiner, Z. Chen, and J.K. Thompson, Nature Photonics (2014).