TY - JOUR
T1 - Controlling the intensity of light in large areas at the interfaces of a scattering medium
AU - Ojambati, Oluwafemi S.
AU - Hosmer-Quint, John T.
AU - Gorter, Klaas-Jan
AU - Mosk, Allard
AU - Vos, Willem L.
PY - 2016/10/19
Y1 - 2016/10/19
N2 - The recent advent of wave-shaping methods has demonstrated the focusing of light through and inside even the most strongly scattering materials. Typically in wavefront shaping, light is focused in an area with the size of one speckle spot. It has been shown that the intensity is not only increased in the target speckle spot, but also in an area outside the optimized speckle spot. Consequently, the total transmission is enhanced, even though only the intensity in a single speckle spot is controlled. Here, we experimentally study how the intensity enhancement on both interfaces of a scattering medium depends on the optimization area on the transmission side. We observe that as the optimization radius increases, the enhancement of the total transmitted intensity increases. We find a concomitant decrease of the total reflected intensity, which implies an energy redistribution between transmission and reflection channels. In addition, we find qualitative evidence of a long-range reflection-transmission correlation. Our result is useful for efficient light harvesting in solar cells, multichannel quantum secure communications, imaging, and complex beam delivery through a scattering medium.
AB - The recent advent of wave-shaping methods has demonstrated the focusing of light through and inside even the most strongly scattering materials. Typically in wavefront shaping, light is focused in an area with the size of one speckle spot. It has been shown that the intensity is not only increased in the target speckle spot, but also in an area outside the optimized speckle spot. Consequently, the total transmission is enhanced, even though only the intensity in a single speckle spot is controlled. Here, we experimentally study how the intensity enhancement on both interfaces of a scattering medium depends on the optimization area on the transmission side. We observe that as the optimization radius increases, the enhancement of the total transmitted intensity increases. We find a concomitant decrease of the total reflected intensity, which implies an energy redistribution between transmission and reflection channels. In addition, we find qualitative evidence of a long-range reflection-transmission correlation. Our result is useful for efficient light harvesting in solar cells, multichannel quantum secure communications, imaging, and complex beam delivery through a scattering medium.
KW - METIS-318177
KW - IR-101630
U2 - 10.1103/PhysRevA.94.043834
DO - 10.1103/PhysRevA.94.043834
M3 - Article
SN - 2469-9926
VL - 94
JO - Physical review A : atomic, molecular, and optical physics and quantum information
JF - Physical review A : atomic, molecular, and optical physics and quantum information
IS - 4
M1 - 043834
ER -