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Laser Physics Laboratory is affiliated both to CNRS and to University Paris 13. We study the interactions between light and matter.

Our experiments range from the most fundamental aspects of basic science to applied research: quantum physics, atomic and molecular physics, optical devices, biomedical imaging...

The lab is structured into eight experimental research teams, four shops and an administrative department. It is composed of about seventy-five people (10 CNRS full-time researchers, 30 university teaching staff members, a technical staff of 15 people, about 20 PhD students and post-docs), plus several short-term trainees and foreign visitors.

Olivier Gorceix,
Director of laboratory

APR
4
2016
Photo-induced etching at the nanoscale based upon a magnetic trasition

Etching of ZrO2 nanostripe using localized magnetic field oscillating at the frequency of light. The polarization dependence resulted in the different etching profiles. Left: Polarization perpendicular to nanostripe. Right: Polarization parallel to nanostripe. © Takashi YatsuiA work performed in Tokyo in the group of Pr Yatsui, benefiting from a co-operation with Daniel Bloch, team SAI of LPL and with chemists from IS2M (CNRS Mulhouse) initiated after two France-Japan seminars in Nanophotonics (Villetaneuse 2010, et Toba 2011), shows that optical etching can use the magnetic component of the irradiating light. In the vicinity of a nanostructured preform of ZrO2, the irradiation by a continuous wave He-Cd laser (Lambda=325 nm) allows the local photodissociation of the neighbouring O2 molecules, in a process based upon a magnetic transition (M1), often assumed to be negligible, but here locally enhanced by the nanostructured field. This work, freshly published in "Light: Science and Applications" opens new directions, through novel etching processes for nanofabrication.



See also the research news from Tokyo University.


FEB
29
2016
An ultra-narrow linewidth solution-processed organic laser

Figure : Schéma du dispositif expérimentalA small organic laser with an ultranarrow linewidth in the sub-gigahertz regime could aid high-resolution spectroscopy and coherent sensing. The device’s narrow emission is due to the use of an external cavity design that features a volume Bragg grating as an output coupler reflector. Oussama Mhibik and co-workers from France and the USA say that their vertical external-cavity surface-emitting organic laser offers linewidths as narrow as 200 MHz (0.26 pm). This linewidth is two to three orders of magnitude smaller than those of other designs of organic lasers and corresponds to a coherence length of 1m. The laser’s gain medium is a thin film of PMMA polymer doped with the dye rhodamine 640 and it is pumped with pulses from a frequency-doubled Nd:YAG laser.



Full text in open access.


JAN
13
2016
Sub-Hz frequency-stabilisation of a quantum cascade laser

Figure : Schéma du dispositif expérimentalResearchers from LNE-SYRTE (Observatoire de Paris, CNRS, UPMC Université Paris 6) and from the Metrology, Molecules and Fundamental Tests group of LPL (Université Paris 13 et CNRS) have recently frequency-stabilised a quantum cascade laser operating in the mid-infrared range and have narrowed its line width down to less than a hertz. The obtained stability and precision, 100 times better than the state-of-the-art, allow for very high precision spectroscopic measurements on a variety of molecules.



This work published in Nature Photonics and mentioned in a previous post is now the subject of a news of the Institut de Physique of CNRS that you can read as a pdf.



Find the article on open archive HAL and arXiv database.



 


See also other news below ...

General news of laboratory
55 ticket (s) in this blog.
Science news of the laboratory
23 ticket (s) in this blog.
The awards and honors members of the laboratory
10 ticket (s) in this blog.


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