title: Programmable multiport optical circuits in opaque scattering materials.
abstract: We propose and experimentally verify a method to program the effective transmission matrix of general multiport linear optical circuits in random multiple-scattering materials by phase modulation of incident wavefronts. We demonstrate the power of our method by programming linear optical circuits in white paint layers with 2 inputs and 2 outputs, and 2 inputs and 3 outputs. Using interferometric techniques we verify our ability to program any desired phase relation between the outputs. The method works in a deterministic manner and can be directly applied to existing wavefront-shaping setups without the need of measuring a transmission matrix or to rely on sensitive interference measurements.
authors.forename: Simon R
authors.initials: SR
authors.lastname: Huisman
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Huisman
authors.forename: Tom A W
authors.initials: TA
authors.lastname: Wolterink
authors.forename: Allard P
authors.initials: AP
authors.lastname: Mosk
authors.forename: Pepijn W H
authors.initials: PW
authors.lastname: Pinkse