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 experimentally demonstrate a reconfigurable and timing-jitter insensitive AND/NOT gate based on tunable gain dynamics in a semiconductor optical amplifier and optical thresholding. The measured jitter tolerance is up to ±50 ps or ±25 ps for the AND/NOT gate.
A Yb rod amplifier that generates 2.7 ps pulses with 55 W power at 50 MHz repetition rate is reported. Amplified pulses exhibit minimal spectral distortion and high beam quality. Frequency-doubling yields 35 W green power.
Three- or four-wave mixing can convert a single-photon wave packet to a new frequency. By tailoring the shapes of the pump(s), one can achieve add/drop functionality for different temporally orthogonal wave packets.
We present latest results towards a high average power and CEP-stable few-cycle mid-IR OPCPA for extreme nonlinear optics and strong field physics. Supercontinuum generation and self-compression to 3-cycles will be highlighted.
We demonstrate that by optimizing excitation photon energy in optical modulation of quantum cascade laser, both amplitude and frequency modulation depth are increased. Also, optical switch on and off can be controlled by excitation wavelength.
We present a new approach to study repetition-rate multiplication of pulse trains via the Talbot-effect. Periodic functions are utilized to represent the spectral phase, enabling the calculation of temporal phase patterns for the first time.
A new direction in femtosecond laser nano-structuring of transparent dielectric films is presented towards ejecting thin layers and forming internal nano-voids that open new directions in film coloring, flexible surface structuring and 3D microfluidics.
Fourth-order cross-correlation of the laser pulse is obtained from the spectral interferogram produced from the laser pulse and a self-created reference pulse. High dynamic range contrast measurement (60 dB) is demonstrated by measuring an imposed pre-pulse.
We present the design and progress towards implementation of a femtosecond fiber timing distribution system for the Linac Coherent Light Source at SLAC enabling machine diagnostic at the 10 fs level.
We examine the photon statistics of photon-subtracted thermal light with photon-number-resolving detection. We show the photon-number distribution transforming from a Bose-Einstein distribution to a Poisson distribution as the number of subtracted photon increases.
We demonstrate that thousands of periodic nano-craters are fabricated on a tapered optical nanofiber, by irradiating just a single femtosecond laser pulse. Such periodic nano-craters on the nanofiber, act as a 1-D photonic crystal.
We apply the recently developed time-transformation technique to optical pulse propagation in nonlinear Kerr media, and to study carrier-wave shocking and generation of odd-order harmonics.
We show, theoretically and experimentally, that the polarization of high-order harmonics driven by counter-rotating elliptically-polarized bichromatic lasers are completely controllable: from linear through elliptic to circular polarization. New selection rules are observed.
“Cryolaser” diode laser designs exploit the improvement in semiconductor material properties at sub-zero temperatures to increase efficiency and power. Optimized single 9xx-nm laser bars demonstrate record peak pulse energy of 2 J (1.7 kW, 1.2 ms, −50°C).
We demonstrate entanglement between an InAs quantum dot (QD) electron spin qubit and a photon. This valuable quantum information resource can be used to mediate spin-spin entanglement between distant nodes of a QD spin network.
We report observation of x-ray and optical sum frequency generation. An ultrafast optical pulse drives charge oscillations to the chemical bonds in diamond. A co-propagating x-ray pulse probes the accompanying atomic-scale chemical bond distortion.
We present results on the relaxation dynamics of photoexcited carriers in MoS2 using optical-pump terahertz-probe spectroscopy. Our measurements indicate that carrier recombination is accelerated at low temperatures where defect-assisted recombination becomes more efficient.
Over the last fifteen years, the tailoring of a light field for manipulating the dynamics of a system at the quantum level has taken a prevalent role in modern atomic, molecular and optical physics. As first described by Keldysh [1], the ionization of an atom by an intense laser field will evolve depending upon the light characteristics and atomic binding energy. Numerous experiments have thoroughly...
We report self-injected quasi-monoenergetic (5% spread FWHM) acceleration of electrons to 2.0 ± 0.1 GeV by 0.6 PW-laser-driven wakefield acceleration in pure He plasma of density 5×1017 cm−3. Electron bunches diverge ∼0.5mrad, and contain ∼60 pC.
Optical quantum memories are essential components of future quantum technologies. Here we show experimental results of heralded quantum entanglement between two memories, storage of single-photon polarization qubits and milliseconds spin-wave storage using rare-earth doped crystals.
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.