We demonstrate both theoretically and experimentally that a proper surface modification of a highly scattering material can substantially improve light coupling into turbid medium and increase the photon life-time in this medium. As a practical example, we demonstrate that such amended excitation geometry leads to a factor of 100 improved Raman signal efficiency.
Jonathan V. Thompson, Brett H. Hokr, and Vladislav V. Yakovlev, "Improved light injection and enhanced Raman scattering in microfabricated opaque structures," Proc. SPIE 10112, Photonic and Phononic Properties of Engineered Nanostructures VII, 101120S (Presented at SPIE OPTO: February 01, 2017; Published: 23 February 2017); https://doi.org/10.1117/12.2252775.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon