Coupling of light into the fundamental diffusion mode of a scattering medium
(Conference Presentation)

Oluwafemi S. Ojambati; Hasan Yılmaz; Ad Lagendijk; Allard P. Mosk; Willem L. Vos

doi:10.1117/12.2212931

27 April 2016 Coupling of light into the fundamental diffusion mode of a scattering medium (Conference Presentation)

Oluwafemi S. Ojambati, Hasan Yılmaz, Ad Lagendijk, Allard P. Mosk, Willem L. Vos

Proceedings Volume 9717, Adaptive Optics and Wavefront Control for Biological Systems II; 971711 (2016) https://doi.org/10.1117/12.2212931
Event: SPIE BiOS, 2016, San Francisco, California, United States

Abstract

Diffusion equation describes the energy density inside a scattering medium such as biological tissues and paint [1]. The solution of the diffusion equation is a sum over a complete set of eigensolutions that shows a characteristic linear decrease with depth in the medium. It is of particular interest if one could launch energy in the fundamental eigensolution, as this opens the opportunity to achieve a much greater internal energy density. For applications in optics, an enhanced energy density is vital for solid-state lighting, light harvesting in solar cells, low-threshold random lasers, and biomedical optics. Here we demonstrate the first ever selective coupling of optical energy into a diffusion eigensolution of a scattering medium of zinc oxide (ZnO) paint. To this end, we exploit wavefront shaping to selectively couple energy into the fundamental diffusion mode, employing fluorescence of nanoparticles randomly positioned inside the medium as a probe of the energy density. We observe an enhanced fluorescence in case of optimized incident wavefronts, and the enhancement increases with sample thickness, a typical mesoscopic control parameter. We interpret successfully our result by invoking the fundamental eigensolution of the diffusion equation, and we obtain excellent agreement with our observations, even in absence of adjustable parameters [2]. References [1] R. Pierrat, P. Ambichl, S. Gigan, A. Haber, R. Carminati, and R. Rotter, Proc. Natl. Acad. Sci. U.S.A. 111, 17765 (2014). [2] O. S. Ojambati, H. Yilmaz, A. Lagendijk, A. P. Mosk, and W. L. Vos, arXiv:1505.08103.

Conference Presentation

Citation Download Citation

Oluwafemi S. Ojambati, Hasan Yılmaz, Ad Lagendijk, Allard P. Mosk, and Willem L. Vos "Coupling of light into the fundamental diffusion mode of a scattering medium (Conference Presentation)", Proc. SPIE 9717, Adaptive Optics and Wavefront Control for Biological Systems II, 971711 (27 April 2016); https://doi.org/10.1117/12.2212931

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Diffusion

Scattering

Light scattering

Biomedical optics

Luminescence

Wavefronts

Zinc oxide

Show All Keywords

Keywords/Phrases

Search In:

Publication Years