Created by admin on 15/09/2020

Highlights

Real-time shaping of entangled photons by classical control and feedback

[O. Lib, G. Hasson and Y. Bromberg, Sci. Adv. 6 (2020)]

Wavefront shaping offers the possibility to compensate for the effect of propagation through heterogeneous media. However, when using a single or a few photons, the feedback signal is typically too weak to allow real-time wavefront shaping applications, which limits applications for quantum communications using entangled photons. In this paper from the team of Yaron Bromberg at the Hebrew University of Jerusalem, the authors overcome this challenge by using as feedback the classical signal of the pump that follows the same path as the entangled photon. It allows adapting in real-time the pump wavefront to compensate for the aberrations/scattering introduced by a heterogeneous dynamic sample.

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Created by sebastien.popoff on 11/08/2020

Job offers

Postdoctoral position at the Langevin Institute

Wavefront shaping and study of light propagation in disordered multimode fibers

We are recruiting a postdoc for 1+ year(s) to work on the study of light propagation in multimode fibers for telecommunication applications using wavefront shaping. Join un in Paris!

See our most recent publication: [Learning and avoiding disorder in multimode fibers, arxiv, 2020]

 

Contact: Sébastien Popoff - sebastien.popoff(at)espci.fr

More information here.

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Created by sebastien.popoff on 14/01/2020

Events

2020 IEEE Summer Topical Meeting Series

July 13th - 15th 2020

 Cabo San Lucas, Mexico Virtual Conference

Structure Light Interaction with Matter and the Environment (SL) & Space Division Multiplexing (SDM)

Link: here

The IEEE Summer Topical Meeting Series serves as an international forum to facilitate information exchange between various technical communities using or affected by rapidly growing areas of technology or “Hot Topics” related to the general field of Photonics. This intimate environment provides the opportunity to learn about emerging fields and to interact with the research and technology leaders. Historically, the conference hosts 4-7 individual topics and attracts 250+ people with 30-50 participants attending each topic. The smaller meeting size provides the flexibility to pilot new and unique ideas.

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Created by sebastien.popoff on 04/11/2014

Highlights

A microwave spatial modulator to improve in-home WiFi

 

[N. Kaina et al., Sci. Rep. (2014)]

Wavefront shaping is not limited to optical waves. Similar techniques can be used for any kind of wave for which one can control dynamically the phase over a large number of independent elements. In [N. Kaina et al., Sci. Rep. (2014)], the authors demonstrate the use of their Spatial Microwave Modulator (SMM) to control the propagation of radiofrequency waves inside a room to improve the WiFi signal at any chosen position. The system is passive as there is no energy transfer from the modulator to the WiFi signal, it only controls the local phase of the waves reflected off the modulator. The device is thin and has the typical size of a small poster, it can be conveniently placed on the wall of a typical room without any loss of space.

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