Controlling the polarization of light with chiral plasmonic nanostructures

Institut des Sciences Moléculaires d'Orsay (ISMO)-UMR 8214 CNRS

18 Nov 2023
Job Info

Institut des Sciences Moléculaires d’Orsay (ISMO)-UMR 8214 CNRS
Analysis Discipline
Researcher Profile
Recognised Researcher (R2)
Main Researcher (R4)
First Stage Researcher (R1)
Established Researcher (R3)
Software Deadline
14 Dec 2023 – 22:00 (UTC)
Sort of Contract
Job Standing
Supply Beginning Date
1 Feb 2024
Is the job funded by way of the EU Analysis Framework Programme?
Not funded by an EU programme
Is the Job associated to workers place inside a Analysis Infrastructure?

Supply Description

On this mission we’ll (1) regionally and electrically excite chiral plasmonic nanoparticles and (2) to make use of them to reinforce the chiral properties of a brand new class of two-dimensional (2D) semiconductors referred to as transition steel dichalcogenides (TMDCs), that are key for a brand new department of physics and expertise referred to as valleytronics .

Chiral constructions, whose preliminary and mirror structural photos can’t be superimposed, work together in a different way with left-handed and right-handed circularly polarized gentle. That is referred to as the “chiroptical response”.  Most frequently, the chiroptical response of semiconductor supplies could be very weak. Gold plasmonic nanoparticles, which might focus gentle in sub-wavelength volumes, have a comparatively sturdy chiroptical response. The aim of this mission is thus to reinforce the chiroptical response of a 2D semiconductor utilizing chiral plasmonic nanoparticles. Particularly, the polarization of the semiconductor luminescence will likely be managed with the “handedness” of the nanoparticle.    

Two totally different subjects could also be thought-about on this thesis or postdoc:

  • Matter I: Native electrical excitation of a chiral nanoparticle

The chiroptical response of supplies and constructions is most frequently studied by optical means, but in a future optoelectronic nanodevice, an area digital excitation is critical.  Working with this long-term aim in thoughts, we’ll examine basically for the primary time {the electrical} excitation of a chiral nanoparticle utilizing the tunneling present from a scanning tunneling microscope (STM). We are going to reveal that, relying on the “handedness” of the nanoparticle, the emitted gentle will likely be both right-handed or left-handedly circularly polarized.

  • Matter II: Electrical excitation of a 2D semiconductor in a plasmonic nanocavity

A plasmonic nanocavity is fashioned when a nanoscale hole separates a gold nanoparticle from a gold substrate. The electromagnetic discipline in such a nanocavity is dramatically enhanced, due to the plasmonic resonances which “focus” the electromagnetic discipline on the nanoscale. The primary concept of this matter is to use this precept to chiral plasmonic cavities and thus improve the chiral interactions between gentle and matter.  As a way to regionally excite “right-handed” and “left-handed” nanocavities, and subsequently detect right-handed or left-handed circularly polarized gentle, we’ll full the electrical circuit utilizing the conducting tip of an atomic drive microscope (AFM).  On this case, the tunneling present that may excite the luminescence flows between the nanoparticle and the gold movie.

Please observe the next hyperlink for figures:

Funding class: Autre financement public
Projet ANR
PHD title: Doctorat en nanophysique
PHD Nation: France

Particular Necessities

You’ve a physics background or equal (Grasp-level), you could have an affinity for optics and nanoscience and a want to do experiments. You’re curious and motivated! Good communication abilities in English OR French are required. Be aware that for a motivated candidate, the mission might also embrace numerical modeling.

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