The combined use of a wavefront modulator and a scattering medium forms an «opaque lens» which forces the light to focus tightly. The adaptive focus has the same shape as the correlation function of the original speckle pattern and it can be generated at defined positions with resolution up to hundreds of nanometers. We have demonstrated that manipulating the speckle pattern spatial components can structure the shape of the focus. Exploiting selectively spatial-frequencies from the speckle components we realized opaque lenses able to produce sub-correlation foci and Bessel beams.
|Title of host publication||Adaptive Optics and Wavefront Control for Biological Systems II|
|Publication status||Published - 2016|
|Event||Adaptive Optics and Wavefront Control for Biological Systems II - San Francisco, United States|
Duration: 13 Feb 2016 → 15 Feb 2016
|Other||Adaptive Optics and Wavefront Control for Biological Systems II|
|Period||13/2/16 → 15/2/16|
- bio-medical imaging
- High-Pass spatial filter
- semi-transparent media.
- Wavefront Shaping
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electronic, Optical and Magnetic Materials
- Radiology Nuclear Medicine and imaging