Results 31 to 40 of about 21,730 (244)

Lowering backward Raman and Brillouin scattering in waveguide Raman wavelength converters

Journal of the European Optical Society-Rapid Publications, 2017
Background Liquid filled hollow core fiber Raman wavelength converters are devices enabling to red-shift the wavelength of laser beams delivered by either fixed wavelength or tunable lasers. Most of the reported converters operate in a pulsed regime with
Min Châu Phan Huy, Philippe Delaye, Gilles Pauliat, Nicolas Dubreuil, Frédéric Gérôme, Benoît Debord, Fetah Benabid, Sylvie Lebrun   +7 more
doaj   +1 more source

Antenna surface plasmon emission by inelastic tunneling

Nature Communications, 2019
Developing a microscale ultrafast electrical source of surface plasmons is crucial for nanophotonic applications. Here, the authors report the design, fabrication and characterization of nanoantennas for emission and control of surface plasmons by ...
Cheng Zhang, Jean-Paul Hugonin, Anne-Lise Coutrot, Christophe Sauvan, François Marquier, Jean-Jacques Greffet   +5 more
doaj   +1 more source

Polarization conversion with a photonic crystal slab [PDF]

Journal of the European Optical Society-Rapid Publications, 2008
We show that a photonic crystal slab can enable efficient polarization conversion. Two mechanisms are identified. The first mechanism relies on the anisotropy of the bulk properties of the metamaterial and is mediated by interferences.
Laroche Marine, Marquier François, Vandenbem Cédric, Greffet Jean-Jacques   +3 more
doaj   +1 more source

Role of Static Modes in Quasinormal Modes Expansions: When and How to Take Them into Account?

Mathematics, 2022
The scattering of electromagnetic waves by a resonator is determined by the excitation of the eigenmodes of the system. In the case of open resonators made of absorbing materials, the system is non-Hermitian, and the eigenmodes are quasinormal modes ...
Mondher Besbes, Christophe Sauvan
doaj   +1 more source

On Fabry’s Quotient Theorem

The American Mathematical Monthly, 2022
We present a short proof of the Fabry quotient theorem, which states that for a complex power series with unit radius of convergence, if the quotient of its consecutive coefficients tends to $ s $, then the point $ z=s $ is a singular point of the series. This proof only uses material from undergraduate university studies.
openaire   +2 more sources

Estimation precision of degree of polarization in the presence of signal-dependent and additive Poisson noises [PDF]

Journal of the European Optical Society-Rapid Publications, 2008
We address precision of estimation of the degree of polarization (DOP) from the orthogonal state contrast image (OSCI) in the presence of both signal-dependent Poisson noise due to useful signal, and additive Poisson noise due to dark current and / or ...
Bénière Arnaud, Goudail François, Alouini Mehdi, Dolfi Daniel   +3 more
doaj   +1 more source

High Performance Durable Vanadium Dioxide Spectral Selective Modulation Smart Windows

Advanced Functional Materials, EarlyView.
Crystallinity‐enhanced VO2 nanoparticles with a self‐limited amorphous oxidation shell achieve an order of magnitude durability improvement and high spectral selective modulation performance (luminous transmittance of 28.5%, solar modulation of 10.5%, and mid‐infrared emissivity modulation of 0.5) for smart windows.
Bin Li, Di Zhang, Guanya Wang, Rong Liu, Shouqin Tian, Xiujian Zhao, Zhimei Sun, Yi Long   +7 more
wiley   +1 more source

Design of nanofibres for efficient stimulated Raman scattering in the evanescent field [PDF]

Journal of the European Optical Society-Rapid Publications, 2013
Nanofibres can be produced with diameters smaller than the wavelength of the light they guide. In this regime, the guided mode presents a strong evanescent field well adapted to the excitation of “evanescent nonlinearities”.
Shan L., Pauliat G., Vienne G., Tong L., Lebrun S.   +4 more
doaj   +1 more source

Magnesium‐Based Transient Bioelectronics, Bio‐Optics and Bio‐Scaffolds

Advanced Functional Materials, EarlyView.
This paper reviews the state of the art and recent advances in magnesium‐based thin‐film, foils, and scaffolds for applications in transient bio‐optics, bioelectronics and tissue engineering. The design principles, fabrication methods, material properties, and integration strategies are discussed in detail.
Massimo Mariello, Yves Leterrier
wiley   +1 more source

Type-I intermittency route to chaos in passively Q-switched Tm:YLF laser emitting at 2.3 μm [PDF]

EPJ Web of Conferences
We report on an original chaotic dynamic behaviour of a passively Q-switched 2.3-μm Thulium laser operating on the 3H4 → 3H5 transition. The experiment employs a Tm:LiYF4 laser crystal within various laser cavity configurations, involving optional ...
Dupont Hippolyte, Glasset Matthieu, Loiko Pavel, Georges Patrick, Druon Frédéric   +4 more
doaj   +1 more source