The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
CdTe nanowires have been self-assembled in solution from the individual CdTe nanocrystal building blocks. Individual wires preserve the bright luminescence of CdTe nanocrystals and have been studied by photoluminescence measurements at variable temperature and by fluorescence lifetime imaging microscopy. The wires represent quantum dot solids with a strong degree of electronic coupling between the...
Dielectric transparent microspheres are three-dimensional spherical microcavities which provide high Q-factors and a small mode volume leading to strong optical feedback within the cavity. This paper investigates the optical properties of symmetrically arranged micrcavities (photonic molecules) with regards to resonance modes and directional beam emission by means of photonic nanojets. The unique...
Summary form only given. One-dimensional nanostructures are desirable in modern technology for their potential applications as the smallest possible carriers for electrons or plasmonic signals. The ability to direct the signal from source to destination could have major implications in the fields of nanoelectronics and photonics. However, one of the major challenges facing the application of these...
In this work, we present a method to reveal azimuthal whispering gallery modes (WGMs) in a spherical microcavity coated with a nano-meter thick polyelectrolyte (PE) shell and one monolayer of CdTe semiconductor quantum dots. The PE shell deformability was increased through contact of the shell with a salt-containing solution, which changes the mechanical properties of the PE multilayer. The new approach...
In this work we demonstrate the possibility of mode manipulation in systems of symmetric photonic molecules formed by placing several microspheres in contact. We observe photonic nanojets that reflect the symmetry of the photonic molecule, with 3 jets located at 120 degrees with respect to each other for the triangular molecule. We also present some results showing the coexistence of whispering gallery...
In this paper, we present a novel method to reveal the azimuthal whispering gallery modes (WGMs) in a spherical microcavity. The microcavity has a soft shell on its surface which is coated with CdTe nanocrystals. The deformation of the spherical shape using radiation pressure from a laser beam causes the lifting of the degeneracy of the WGMs. The splitting can be efficiently controlled by the strength...
One-dimensional structures of metal and semiconductor materials (nanowires), have become a focus of interdisciplinary research in recent years both as a model system for studies of 1D quantum confinement effects and because of their potential applications in electronics and photonics. We report the assembly of CdTe nanocrystals into nanowires using an approach that attempts to capitalize on the self-assembling...
We present a detailed study of the photonic modes in aluminosilicate microtube cavity of ~78 mum outer diameter that can act as micron-scale optical cylindrical resonator. We demonstrate a new route to the fabrication of individual microtubes with the maximum length of 200 mum, using a vacuum assisted wetting and filtration through a microchannel glass matrix. The microtubes were studied using micro-photoluminescence...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.