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The near-field tip-antenna enhanced signal transduction with femtosecond laser pulses allows for spatio-spectral and spatio-temporal imaging and quantum coherent control with the perspective to reach the single electronic or vibrational quantum level.
Terahertz radiation permits resonant and sensitive probing of electron transport, spin precession and ion vibration in solids. Recently developed sources of strong-field terahertz pulses even allow one to gain control over these fundamental modes.
Light fields with shapes similar to those produced from RF function generators are realized. Such fields may be used to dictate the microscopic motion of charged particles in atoms and molecules and in matter.
The application of a specific metal organice vapour phase epitaxy (MOVPE) growth process for (GaIn)As-based VECSEL using thermally more efficiently decomposing MO-group-V-sources results in an extended wavelength range and facilitates the necessary strain compensation of the highly compressive-strained (GaIn)As-quantum well layers by tensile-strained Ga(PAs) barrier layers. Applying a closed-loop-design...
This tutorial provides an overview of the basic physical mechanisms of supercontinuum generation. Recent progress in the field and novel physics linked to recently discovered soliton dynamics including optical rogue waves will be reviewed.
We report an efficient, high-energy, diode-pumped Yb:CaF2 regenerative amplifier. Energies up to 1.02 mJ at 1045-nm and 5 kHz-repetition rate in 324 fs-long pulses have been obtained with a beam quality factor of M2 =1.1.
We achieved a sub-fs thermal-noise-limited noise floor in a balanced optical-microwave phase detector and demonstrated long-term stable RF extraction with <1 fs RMS drift and <7 fs pk-pk for over 10 hours of continuous operation.
A new type of “black silicon” materials with high optical absorptance and annealing-insensitivity is designed and fabricated by femtosecond laser pulses. These results have important implications for the fabrication of highly efficient optoelectronic devices.
Combining a multi-color homodyne detection scheme with techniques from quantum optics, we show the feasibility of shot-noise limited measurements of a medium's parameters, while also being able to compensate for their fluctuations.
We experimentally demonstrate that a minute continuous-wave becalms Raman soliton and thus actively suppresses supercontinuum. The effects are characterized in detail by real-time spectrally-resolved statistical analysis enabled by optical time-stretch.
We present an Er-doped fiber femtosecond laser having a wider repetition rate tuning range by introducing a pair of CFBGs which magnifies the cavity length change by 15 times.
We demonstrate an all fiberized, passively mode-locked thulium holmium co-doped fiber laser operating at a wavelength of ∼1.95 µm using the graphene-oxide evanescent field interaction. A temporal pulse width of ∼590 fs is experimentally obtained at 33.25 MHz.
A doubly-resonant AgGaSe2 mid-infrared optical parametric oscillator (OPO) is synchronously pumped by a hybrid 2 µm Er:fiber/Tm:fiber femtosecond mode-locked laser. The OPO produces spectra ranging from 3–5 µm. Numerical simulations confirm the observed behavior.
We use ultrafast optical microscopy to investigate carrier dynamics in single flakes of atomically thin molybdenum disulfide. By tuning the probe wavelength through the bandgap, we reveal the influence of layer thickness on carrier dynamics.
Temporal dissipative solitons in microresonators constitute a novel class of ultra-short optical pulse generators. Here we study the influence of resonator mode-structure, particularly avoided mode crossings, on soliton formation and derive resonator design criteria.
We report implementation of a configurable network of four degenerate optical parametric oscillators as an Ising spin system using time-multiplexed femtosecond pulses. This coherent Ising machine solves an instance of NP-hard MAXCUT problem without error.
We have observed coherent cyclotron resonance oscillations from a two-dimensional electron gas by combining a rapid scanning terahertz time-domain spectrometer with a table-top mini-coil pulsed magnet.
We demonstrate high-density, multi-level crystallization of a Ge2Sb2Te5 thin film using tightly focused femtosecond laser pulses. The optical reflectivity in each distinct phase states level is characterized for applications in ultra-fast cognitive parallel data processing.
We demonstrate standoff detection using stimulated Raman scattering (SRS), simultaneously measuring stimulated Raman gain (SRG) and loss (SRL) within a single laser shot, and detect nanogram quantities of explosives using a 10mW femtosecond laser.
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