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Although shaping of fields around nanostructures is widely studied in plasmonics, the influence of the field inside the nanostructures is often overlooked. The linear field distribution inside the structure taken to the third power causes third-harmonic generation, a nonlinear optical response of matter. We demonstrate how this simple fact can be used to shape complex fields around a single particle...
Femtosecond pulses are primarily generated at 800 or 1030 nm in Tiisapphire or Yb based systems. To generate fully tunable pulses over the full visible and NIR range, optical parametric amplifiers and in particular white light seeded noncollinear optical parametric amplifiers (NOPA) are now widely used. For highest energy pulses this scheme is expanded to OPCPAs. Energy and beam pointing stability...
The emission and propagation of light in disordered media has always been a topic of interest in science, mainly because in nature this is the most common way of light emission and propagation. This research topic received a particular attention after the report of the first highly efficient random laser (RL) [1]. Indeed a large number of investigations discussing the fundamentals and the applications...
Surface states have a fundamental role in many modem technologies as well as in the field-matter interaction exhibited by material surfaces. Their manipulation can be used to functionalise surfaces into devices, enabling or enhancing specific physical mechanism [1]. Many rising technologies, such as photovoltaic metasurfaces, rely on thin-layer semiconductors [2, 3]. Most semiconductor surfaces exhibit...
Availability of high energy, light transients with engineerable electric field in time, open the doors for exploring new regimes in extreme light-mater interaction and is currently one of the most interesting frontiers of ultrafast optics [1]. The current approach to generate high-energy, light transients is based on combining the concepts of waveform synthesis and optical parametric chirped pulse...
Generation of ultrashort and intense laser pulses is the primary motive in ultrafast and nonlinear science. Unfortunately, only a limited number of active media allows for scaling ultrashort pulses to energies greater than a few mJ at kHz repetition rate. For this reason, the available wavelengths are extremely restricted. To drive ultrafast processes in novel frequency domains, the ideal approach...
In 2011, Dual-chirped optical parametric amplification (DC-OPA) [1] had been proposed theoretically as one of the OPA method. Y. Fu et al. experimentally demonstrated DC-OPA in 2015 and generated 10-mJ IR pulses energy in 1–2 um region [2, 3]. At present, DC-OPA method is ready to extend up to THz region [4].
Power-scalable ultrafast mid-IR coherent radiation plays an important role in strong field physics for driving nonlinear optical frequency conversion, such as high harmonic and x-ray generation. The most promising route to access the wavelength range >4 μm connected with scalability of the pulse energy relies on optical parametric chirped-pulse amplification (OPCPA) using non-oxide crystals, like...
Organic dye molecules have been used in great many scientific and technological applications. Among these, the polycyclic aromatic hydrocarbons (PAH) behave very favourably as quantum emitters when embedded in organic crystals at temperatures below 4K. PAHs can serve as solid-state emitters with remarkable optical properties such as near-unity quantum efficiency and high photostability. However, transitions...
In quantum optics, the statistical properties of the emitted photons define the nature of a light source. The black body is a well known example of source with large fluctuations and for which the statistics of the photon number is P(n) ≈ 1/〈 N 〉e−n/(n), if 〈n 〉 ≫ 1 with second order coherence g2 (0) = 2 (thermal light).
Present THz source technology, with peak fields > 1 GV/m, are realized by optical rectification (OR) of femtosecond pulses in organic crystals [1-3]. The main challenge for such source is the need of high-energy pump laser at non-standard wavelengths (1.2–1.5 μm) for the optimal phase matching conditions. Ti:sapphiredriven optical parametric amplifiers are the most common technique to shift the...
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