Selective coupling of optical energy into the fundamental diffusion mode of a scattering medium
arXiv:1505.08103 · doi:10.1088/1367-2630/18/4/043032
Abstract
We demonstrate experimentally that optical wavefront shaping selectively couples light into the fundamental diffusion mode of a scattering medium. The total energy density inside a scattering medium of zinc oxide (ZnO) nanoparticles was probed by measuring the emitted fluorescent power of spheres that were randomly positioned inside the medium. The fluorescent power of an optimized incident wave front is observed to be enhanced compared to a non-optimized incident front. The observed enhancement increases with sample thickness. Based on diffusion theory, we derive a model wherein the distribution of energy density of wavefront-shaped light is described by the fundamental diffusion mode. The agreement between our model and the data is striking not in the least since there are no adjustable parameters. Enhanced total energy density is crucial to increase the efficiency of white LEDs, solar cells, and of random lasers, as well as to realize controlled illumination in biomedical optics.
5 pages, 5 figures
References in corpus (8)
- Phase control algorithms for focusing light through turbid media
- Universal optimal transmission of light through disordered materials
- Control of light transmission through opaque scattering media in space and time
- Full transmission and reflection of waves propagating through a maze of disorder
- Invariance property of wave scattering through disordered media
- Transmission channels for light in absorbing random media: from diffusive to ballistic-like transport
- Interplay between multiple scattering, emission, and absorption of light in the phosphor of a white light-emitting diode
- Modification of light transmission channels by inhomogeneous absorption in random media
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- Inverse Design of Perfectly Transmitting Eigenchannels in Scattering Media
- Controlling the intensity of light in large areas at the interfaces of a scattering medium
- Super-universality of eigenchannel structures and possible optical applications
- Enhanced deep detection of Raman scattered light by wavefront shaping
- Energy density distribution of shaped waves inside scattering media mapped onto a complete set of diffusion modes
- Behaviour of light transmission channels in random media with inhomogeneous disorder
- Mesoscopic Theory of Wavefront Shaping to Focus Waves inside Disordered Media
- Sum rules for energy deposition eigenchannels in scattering systems
- Harnessing coherent-wave control for sensing applications