Mills, J.D., Kazansky, P.G., Bricchi, E. and Baumberg, J.J.
Embedded anisotropic microreflectors by femtosecond-laser nanomachining
Applied Physics Letters, 81, (2), . (doi:10.1063/1.1492004).
Directly written embedded structures created within fused silica by a femtosecond Ti:sapphire laser are observed to strongly reflect blue light. Reflection emerges only in a direction parallel to the polarization axis of the writing laser. This anisotropic-effect is caused by a periodic modulation of refractive index of amplitude Delta.n ~ 10–2 with a characteristic period Lambda ~ 150nm over a spot size ~1.5µm. We show that the origin of the anisotropic reflection is the primary cause of other anisotropic phenomena reported in recent experiments.
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