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.
We propose a square photonic crystal point-shifted nanocavity, which sustains an ultra-small lowest-order whispering-gallery mode. Lasing actions with low threshold of 160 μW and changed polarization due to a nearby nano-particle are observed.
We demonstrate a unique pump-probe scheme for high harmonic spectroscopy, which is sensitive to weak excitations and provides spectral information without the need for a VUV spectrometer.
We directly investigate the influence of nonlinear loss dynamics on a slow-light silicon waveguide optical limiter, mapping how the response of free carrier absorption varies as intensity changes approach the free carrier recombination time.
Since coherent receivers are nearing mass production for communication, it is crucial to consider the approaches to their design and evaluation, with emphasis on testing for optical front end calibration and production pass/fail type testing.
0.7 watts 355nm laser is achieved from 3rd-order-QPM PPMgSLT by sum-frequency generation of fundamental and second-harmonic of pulsed Nd: YVO4 laser. 2nd-order-QPM PPMgSLT is successfully fabricated, which promises 355 nm generation of sub-watts order.
Genuine U.S. Federal Reserve Notes have a consistent, two-component intrinsic fluorescence lifetime. We used scanning two-photon laser excitation and the time-correlated single photon counting method to identify three different types of counterfeit U.S. paper money.
The travelling-wave method was used to investigate nonlinear spatio-temporal dynamics of a tunable laser under both weak and strong external optical injection. The results suggest effective methods of controlling laser dynamics in network applications.
The magnetic and surface plasmon resonances in isotropic fishnet metamaterials with left-handed band in terahertz regime were studied experimentally and by simulation. An LC-circuit model has been adapted to describe the magnetic resonance as a function of the device geometry.
A semiconductor laser with active layer consisting of a patterned quantum dot lattice demonstrates evidence of miniband formation resulting from inter-dot coupling. Excited state lasing is thought to result from a phonon bottleneck-like effect.
Authors realized the optical switch satisfying high-speed response (<;10 nsec), polarization independent operation and low driving voltage of 3 volt by constructing a new structure on LiNbO3 substrate for the first time in the world.
We demonstrate optical carrier regeneration for wavelength reuse in a multicarrier distributed OADM network. It is possible to achieve a high-quality regenerated signal even though the employed data signal for wavelength reuse is drastically degraded.
We present a new technique to fill arbitrary patterns of a photonic crystal fiber selectively with high nonlinear liquids. Thus we can create waveguides and waveguide arrays with tailored dispersion, nonlinearity, and spatial arrangement.
Selective area growths of highly-uniform InGaN quantum dots (QDs) on dielectric nanopatterns defined by self-assembled diblock copolymer were demonstrated with ultra-high QDs density of 8×1010 cm-2, which represents the highest QDs density reported for nitride-based QDs.
Thermal dephasing due to two-photon absorption-induced linear absorption is reduced by minimizing second- and fourth-harmonic beam overlap through tight elliptical focusing perpendicular to the walk-off plane, leading to multi-watt, high-repetition rate ultraviolet generation in BBO.
We consider specific metamaterials hosting a novel extreme nonlinear regime where the linear and nonlinear dielectric responses are comparable, a regime supporting peculiar beams whose power flow direction reverses its sign along the transverse profile.
We derived an expression for the noise between the diffraction orders from a random grating. The result was applied to analyze the statistical duty-cycle error in PPLN, providing an efficient means for poling quality evaluation.
We report the two-photon absorption spectrum of single crystals of an asymmetric cyanine-like dye in comparison to its spectrum in solution. The 2PA peak magnitude is comparable to bulk semiconductors of similar absorption edge.
Ultra-high reflectivity is achieved at the end-face of a hollow-core PCF via the insertion and fusion of a metal-coated tapered single-mode-fiber to the core of the hollow fiber. Saturable absorption is demonstrated using this device.
The effect of optical feedback is investigated for a quantum-dash-based passive mode-locked laser. We observe a drastic reduction of the radio frequency spectrum linewidth even beyond the onset of coherence collapse.
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.