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.
Mechanics is increasingly recognized as an important factor in numerous biological processes. Monitoring the mechanical properties of cells and tissue is considered a key factor to the understanding of a range of fundamental biological processes.[1]
In this work, the on-chip quantum interference of two single surface plasmons was achieved and the high visibility (greater than 90%) proves the bosonic nature of single plasmons. The effect of intrinsic losses in plasmonic waveguides is also discussed.
X-ray FEL facilities place challenging demands on the stability and configuration of ultrafast optical lasers for user experiments; future facilities will push the frontiers for high peak and average power ultrafast lasers.
In van der Waals heterostructures assembled from atomically thin layers of graphene, hexagonal boron nitride and other related materials electronic, plasmonic and phonon polaritonic phenomena are all intertwined. We explored these effects via infrared nano-imaging.
We survey the latest advances in initiation and observation of quantum coherent interactions in room temperature quantum dot amplifiers operating at 1550 nm. Single and double pulse FROG measurements accompanied by detailed modeling are described.
Distinguishing ablation characteristic, nanometer phenomena such as surface morphology and ion emission, resulting from femtosecond laser-matter interactions for metals, and some their applications are reviewed, comparing with conventional nanosecond laser-matter interactions and ablation.
Although the genomes of many animals, from worms to humans, have been sequenced, much of the detailed molecular understanding of the biology of these genes and their proteins is unknown. One of the major problems is that we cannot currently see what a protein does, where it is, and how it moves. Thus, most functional conclusions about a protein are necessarily indirect. The visualization of the structure...
Fluorescence localisation microscopy is a powerful tool for imaging cell structures at a lengthscale of tens of nm, but its utility for live cell imaging is limited, as it takes a long time to acquire the data needed for a super-resolution image. However, the data acquisition time can be cut by more than two orders of magnitude by using advanced algorithms which can analyse dense data. Different algorithms...
With the ever-increasing performance of optical clocks, it is important to develop parallel methods for optically-based frequency/timing distribution. I will review frequency combs, established methods for distribution over fiber-optics, and recent demonstrations over free-space links.
Dielectric laser acceleration of electrons is the optical counterpart of phase-synchronous RF-acceleration of electrons in classical accelerators, demonstrated by us and at Stanford/SLAC recently. We discuss concept, experiments and detail highlights of this high-gradient scheme.
The tutorial will focus on the remarkable opportunities offered by ultracold quantum gases trapped in optical lattices to address fundamental physics questions ranging from condensed matter physics over statistical physics to high energy physics with table-top experiment.
All the nuclear power plants in Japan have stopped operation, but before the March 2011 tsunami 30% of the total electricity generation had been supplied by nuclear power plants. It is predicts that by 2020, penetration of the LED lighting in Japan will be more than 70%, by which we can reduce 7% of the electricity. In this presentation, current and future energy savings by GaN and related compounds...
We present interleaved OCT as a unique strategy to exploit long coherence lengths for novel spectral multiplexing schemes that permit multi-purpose information encoding and streamlined image acquisition.
I will report our recent effort towards realizing the full potential of a many-particle clock with a state-of-the-art stable laser. We have achieved fractional stability of 2.2 × 10−16 at 1 s for the JILA Sr optical atomic clock. We have also reduced the total uncertainty of our clock to 2.1 × 10−18 in fractional frequency units. Both represent new records for the performance of an atomic clock.
Fluorescence Ca2+ imaging enables large-scale recordings of neural activity, but collective dynamics across mammalian brain regions are generally inaccessible within single fields of view. Here we introduce a two-photon microscope possessing two articulated arms that can simultaneously image two brain areas (∼0.38 mm2 each), either nearby or distal, using microendoscopes, in awake behaving rodents.
The Campbell group uses protein engineering to develop fluorescent protein-based reporters for cell imaging. I will describe our most recent efforts to engineer an improved generation of reporters for calcium ion, membrane potential, and neurotransmitters.
We demonstrate that apodized Bragg gratings placed in the two arms of a Mach-Zehnder structure in SOI can provide high-quality filtering functions overcoming phase noise distortions. As examples, we present narrowband, phase-shifted and dispersion-less filters.
We discuss novel nonlinear effects in nanostructured metasurfaces driven by optically-induced electric and magnetic responses associated with Mie-type resonances of their metallic and dielectric structural elements including the generation of multipole harmonics and substantial power enhancement.
High-precision processing of materials with ultrafast laser pulses is drawing increasing attention as laser sources are finally catching up with industry requirements. In particular, very rapid progress has been achieved in ultrafast fiber lasers, which are popular as a result of their highly repeatable, environmentally robust performance, compact size and possibility to reach high average powers...
Monolayer MoS2 possess a new valley-pseudospin degree of freedom besides electronic charge and spin. In this talk I will talk about our recent results on optical generation of valley polarization, based on which a novel Hall effect associated with the new degree of freedom is demonstrated. The mechanisms responsible for driving the new valley Hall effect will be discussed.
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.