Volume 108, Number 1, October 2014
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||02 October 2014|
Infiltrating a thin or single-layer opal with an atomic vapour: Sub-Doppler signals and crystal optics
1 Laboratoire de Physique des Lasers, Université Paris13 - Sorbonne-Paris-Cité - 99 Av. JB Clément, 93430 Villetaneuse, France
2 UMR 7538 du CNRS - 99 Av. JB Clément, 93430 Villetaneuse, France
3 Moscow Institute of Physics and Technology (State University) - Institutskiy Pereulok 9, 141700 Dolgoprudny, Russia
4 P.N. Lebedev Physics Institute - 53 Leninskii prospekt, 119991 Moscow, Russia
Received: 19 June 2014
Accepted: 15 September 2014
Artificial thin glass opals can be infiltrated with a resonant alkali-metal vapour, providing novel types of hybrid systems. The reflection at the interface between the substrate and the opal yields a resonant signal, which exhibits sub-Doppler structures in linear spectroscopy for a range of oblique incidences. This result is suspected to originate in an effect of the three-dimensional confinement of the vapour in the opal interstices. It is here extended to a situation where the opal is limited to a few- or even a single-layer opal film, which is a kind of bidimensional grating. We have developed a flexible one-dimensional layered optical model, well suited for a Langmuir-Blodgett opal. Once extended to the case of a resonant infiltration, the model reproduces quick variations of the lineshape with incidence angle or polarization. Alternately, for an opal limited to a single layer of identical spheres, a three-dimensional numerical calculation was developed. It predicts crystalline anisotropy, which is demonstrated through diffraction on an empty opal made of a single layer of polystyrene spheres.
PACS: 78.67.-n – Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures / 42.82.Fv – Hybrid systems / 34.35.+a – Interactions of atoms and molecules with surfaces
© EPLA, 2014
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.