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A new Paradigm for Optoelectronics : Solid State Metamaterials with Soft Matter Properties

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Supervisor : Aloyse Degiron
e-mail : aloyse.degiron@univ-paris-diderot.fr
Phone number : 01 57 27 62 26
Funding : YES       type of funding : ERC grant
Methods and techniques : numerical modeling, experimental nano-optics.
Required qualities : strong background in nanophotonics, optoelectronics, fluid mechanics - basic skills in programming - good level of English.

Recently, we have introduced a way to transform basic LEDs into revolutionary devices [1-3]. At the heart of our strategy is to replace the standard active medium by an artificial composite (i.e. a metamaterial) made of colloidal quantum dots coupled with a metallic nanostructured pattern. The hybridization makes it possible to control all aspects of the electroluminescence at the nanoscale (electrical injection, polarization, color) and to weave light-emitting surfaces of unprecedented complexity.

The goal of this thesis is to develop the next generation of artificial media for optoelectronics—one with properties capable of evolving dynamically as a function of time. Two complementary routes will be investigated. The first one will rely on enabling phase transitions within artificial media so as to transform their behavior in a reversible way. The second one will rely on creating optical beams that behave more like fluids than light, i.e. with time-varying turbulences. With this thesis, the successful candidate will have the opportunity to write a new page in optoelectronics, one in which LEDs and other devices have characteristics more akin to those of soft matter or even biological systems than those of cold hard solid-state physics. The work will encompass theory, simulations, fabrication and characterization of innovative devices. It will tackle fundamental questions on light-matter interactions, encompass soft matter and chemistry aspects—and also lead to new devices with a high potential for applications.

We are looking for a highly motivated individual with a strong background in nanophotonics, optoelectronics, fluid mechanics as well as basic skills in programming. At the same time, he/she should be open to do extensive experimental work and numerical simulations. A good level of English is also a requisite. The successful candidate will join a dynamic team, with collaborations with top researchers around the planet—and will work in a world-class environment in the heart of Paris.



Example of a metamaterial LED displaying the Chinese word for “light” at the nanoscale © Giovanni Magno











References
[1] Q. Le-Van, X. Le Roux, A. Aassime and A. Degiron, Nature Communications 7, 12017 (2016).
[2] H. Wang, Q. Le-Van, A. Aassime, X. Le Roux, F. Charra, N. Chauvin and A. Degiron, Advanced Optical Materials 6, 170058 (2018).
[3] H. Wang, A. Aassime, X. Le Roux, N.J. Schilder, J.-J. Greffet and A. Degiron, Phys. Rev. Applied 10, 034042 (2018).