Optical phase conjugation with less than a photon per degree of freedom
arXiv:1610.04553 · doi:10.1103/PhysRevLett.118.093902
Abstract
We demonstrate experimentally that optical phase conjugation can be used to focus light through strongly scattering media even when far less than a photon per optical degree of freedom is detected. We found that the best achievable intensity contrast is equal to the total number of detected photons, as long as the resolution of the system is high enough. Our results demonstrate that phase conjugation can be used even when the photon budget is extremely low, such as in high-speed focusing through dynamic media, or imaging deep inside tissue.
References in corpus (6)
- Measuring the Transmission Matrix in Optics : An Approach to the Study and Control of Light Propagation in Disordered Media
- Focusing and Compression of Ultrashort Pulses through Scattering Media
- Universal optimal transmission of light through disordered materials
- Exploiting the Time-Reversal Operator for Adaptive Optics, Selective Focusing and Scattering Pattern Analysis
- Optical focusing inside scattering media with time-reversed ultrasound microbubble encoded (TRUME) light
- Optimal control of light propagation through multiple-scattering media in the presence of noise