Abstract
We report a method for measuring the transmission matrix of a disordered medium using a binary-control of a digital micromirror device (DMD). With knowledge of the measured transmission matrix, we identified the transmission eigenchannels of the medium. We then used binary control of the DMD to shape the wavefront of incident waves and to experimentally couple light to individual eigenchannels. When the wave was coupled to the eigenchannel with the largest eigenvalue, in particular, we were able to achieve about two times more energy transmission than the mean transmittance of the medium. Our study provides an elaborated use of the DMD as a high-speed wavefront shaping device for controlling the multiple scattering of waves in highly scattering media.
| Original language | English |
|---|---|
| Pages (from-to) | 35-39 |
| Number of pages | 5 |
| Journal | Optics Communications |
| Volume | 330 |
| DOIs | |
| State | Published - 1 Nov 2014 |
Bibliographical note
Funding Information:This research was supported by the Basic Science Research Program (2013R1A1A2062560) and Nano-Material Technology Development Program (2011–0020205) through the National Research Foundation of Korea (NRF), the IT R&D program (R2013080003) of MSIP, and the Seoul metropolitan government, Korea under contract of R&BD Program WR100001 .
Keywords
- Binary eigenchannel
- Binary-control digital micromirror device
- Energy transfer
- Multiple scattering
- Turbid medium