Erratum: GV/m Single-Cycle Terahertz Fields from a Laser-Driven Large-Size Partitioned Organic Crystal [Phys. Rev. Lett. 
<b>112</b>
, 213901 (2014)]

Vicario, C.; Monoszlai, B.; Hauri, Christoph P.

doi:10.1103/physrevlett.121.259901

Cited by 63 publications

(79 citation statements)

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“…[92,97] As an alternative, Cr:forsterite lasers, operating around 1.25 µm wavelength, enable efficient direct pumping of organic crystals. These features limit the maximum usable pump fluence and can result in unstable THz emission.…”

Section: Organic Nonlinear Materialsmentioning

confidence: 99%

“…These features limit the maximum usable pump fluence and can result in unstable THz emission. [89,97] High-field THz transients were reported with as high as 0.9 mJ energy, produced in a 400 mm 2 partitioned DSTMS crystal by OR of 30 mJ laser pulses, delivered by a Cr:forsterite laser. Larger than 10 MV cm −1 electric and 3 T magnetic field strengths were achieved with up to 3% efficiency by using such a laser to pump different organic crystals.…”

Section: Organic Nonlinear Materialsmentioning

confidence: 99%

“…These features limit the maximum usable pump fluence and can result in unstable THz emission. [92,97] As an alternative, Cr:forsterite lasers, operating around 1.25 µm wavelength, enable efficient direct pumping of organic crystals. Larger than 10 MV cm −1 electric and 3 T magnetic field strengths were achieved with up to 3% efficiency by using such a laser to pump different organic crystals.…”

Section: Organic Nonlinear Materialsmentioning

confidence: 99%

“…[92] Possible limitations of the available crystal size can be overcome by using partitioned crystals. [89,97] High-field THz transients were reported with as high as 0.9 mJ energy, produced in a 400 mm 2 partitioned DSTMS crystal by OR of 30 mJ laser pulses, delivered by a Cr:forsterite laser. [93] The frequency range covered was between 0.1 and 5 THz.…”

Section: Organic Nonlinear Materialsmentioning

confidence: 99%

See 3 more Smart Citations

Laser‐Driven Strong‐Field Terahertz Sources

Fülöp

Tzortzakis

Kampfrath

2019

Advanced Optical Materials

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reason for this interest relies on the fact that THz radiation can couple resonantly to numerous fundamental motions of ions, electrons, and electron spins in all phases of matter. For example, in solids, the THz range overlaps with the frequency of lattice vibrations (phonons), the collision rates of conduction electrons, the binding energy of bound electron-hole pairs (excitons), and the precession frequency of spin waves (magnons). Consequently, THz radiation, both continuous-wave and pulsed, has been used for characterization of and gaining insight into elementary processes in complex materials. The majority of these studies used relatively weak THz fields and, thus, probed the linear response of the material, without inducing notable material modifications.Only recently, however, completely new avenues in THz science were opened up by triggering nonlinear THz responses of materials. [3][4][5][6][7][8][9][10][11][12][13] Instead of using weak fields to primarily observe selected THz modes such as phonons or magnons, strong fields allow one to actively drive them to unprecedentedly large amplitudes, potentially thereby resulting in novel states of matter. [6,8,11] For example, simulations suggest that exciting matter with intense THz transients may lead to massive modifications of electrically [14] or magnetically [15] ordered domains and enable the acceleration of free ions to ≈1 MeV, [16] and postacceleration to 50-100 MeV energies. [17] Remarkable experimental results such as switching of magnetic order, [18,19] parametric amplification of optical phonons, [20] novel insights into spin-lattice coupling, [21,22] and acceleration of free electrons in a THz linear accelerator [23] were achieved only recently. This progress has been made possible by the development of laser-driven table-top THz sources routinely providing pulses with unprecedented energies and peak electric and magnetic field strengths throughout the entire THz spectral range. Different laser-based THz pulse generation techniques can be used to access different parts of the spectral range extending from 0.1 to 10 THz. Some of the recently developed technologies enable the generation of radiation with even larger bandwidth or tuning range up to 100 THz and beyond, which lead to an extension of what is called the THz spectral range. An overview of the approximate spectral coverage and the achieved highest pulse energies and peak electric-field strengths of various laserdriven technologies is given in Figure 1. ScopeIn this work, the basic principles of femtosecond-laser-driven intense pulsed THz sources and their recent development are reviewed. These sources are capable of delivering peak electric field strengths on the MV cm −1 scale. Corresponding typical THz pulse energies are on the µJ-to-mJ level, depending on A review on the recent development of intense laser-driven terahertz (THz) sources is provided here. The technologies discussed include various types of sources based on optical rectification (OR), spintronic emitters, and laserfilame...

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Section: Organic Nonlinear Materialsmentioning

confidence: 99%

Section: Organic Nonlinear Materialsmentioning

confidence: 99%

Section: Organic Nonlinear Materialsmentioning

confidence: 99%

Section: Organic Nonlinear Materialsmentioning

confidence: 99%

See 2 more Smart Citations

Laser‐Driven Strong‐Field Terahertz Sources

Fülöp

Tzortzakis

Kampfrath

2019

Advanced Optical Materials

265

147

View full text Add to dashboard Cite

show abstract

“…In particular, at high intensities, such pulses allow manipulation of the transient states of matter, for example giving control over the electronic, spin and ionic degrees of freedom of molecules and solids [5]. Several methods such as two-color laser filamentation [6], optical reflection in lithium-niobate [7,8] or organic crystals [9], and relativistic laser irradiated plasmas [10][11][12][13][14][15][16][17][18], have been developed for generation of THz pulses with electric fields above 1 MV/cm. However, scaling up such methods towards higher intensities remains challenging, thus representing an active research field.Relativistic electron beams have also been used to produce THz radiation through a variety of mechanisms that include synchrotron radiation [19], transition radiation [20,21], and diffraction radiation [22,23].…”

mentioning

confidence: 99%

Coherent Diffraction Radiation of Relativistic Terahertz Pulses from a Laser-Driven Microplasma Waveguide

Fülöp

2019

Phys. Rev. Lett.

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We propose a method to generate isolated relativistic terahertz (THz) pulses using a high-power laser irradiating a mirco-plasma-waveguide (MPW). When the laser pulse enters the MPW, highcharge electron bunches are produced and accelerated to ∼ 100 MeV by the transverse magnetic modes. A substantial part of the electron energy is transferred to THz emission through coherent diffraction radiation as the electron bunches exit the MPW. We demonstrate this process with three-dimensional particle-in-cell simulations. The frequency of the radiation is determined by the incident laser duration, and the radiated energy is found to be strongly correlated to the charge of the electron bunches, which can be controlled by the laser intensity and micro-engineering of the MPW target. Our simulations indicate that 100-mJ level relativistic-intense THz pulses with tunable frequency can be generated at existing laser facilities, and the overall efficiency reaches 1%. PACS numbers:High power terahertz (THz) pulses have attracted significant attention since they can serve as a unique and versatile tool in fields ranging from biological imaging to material science [1][2][3][4]. In particular, at high intensities, such pulses allow manipulation of the transient states of matter, for example giving control over the electronic, spin and ionic degrees of freedom of molecules and solids [5]. Several methods such as two-color laser filamentation [6], optical reflection in lithium-niobate [7,8] or organic crystals [9], and relativistic laser irradiated plasmas [10][11][12][13][14][15][16][17][18], have been developed for generation of THz pulses with electric fields above 1 MV/cm. However, scaling up such methods towards higher intensities remains challenging, thus representing an active research field.Relativistic electron beams have also been used to produce THz radiation through a variety of mechanisms that include synchrotron radiation [19], transition radiation [20,21], and diffraction radiation [22,23]. Radiation emitted by these mechanisms is coherent if the bunch length is shorter than the radiated wavelength of interest. The radiated energy then scales as the square of the beam charge. Previous studies have also shown that the radiation power decreases significantly with the beam divergence, and the energy radiated in a small cone nearaxis would strongly benefit from a high beam energy [24]. Therefore, choosing an electron source with desired qualities (high charge, high energy, and well-collimated) can be crucial for producing intense THz emission that is attractive to a range of applications [5].Currently available sources of relativistic electron beams are either linear accelerators or compact sources based on laser-plasma acceleration. The THz radiation energy from linear accelerators has reached ∼ 600 µJ/pulse [25], but such sources are expensive and large and thus can only offer limited accessibility. Laser wakefield acceleration in the nonlinear "bubble" regime can produce multi-GeV electron beams with small divergence (∼0....

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New Class of Efficient Terahertz Generators: Effective Terahertz Spectral Filling by Complementary Tandem Configuration of Nonlinear Organic Crystals

Kang

Lee

Kim

et al. 2018

Adv Funct Materials

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Intense table-top terahertz (THz) sources, which have progressed tremendously in the last decade, are becoming more important for advanced THz science to study light-matter interactions and subsequent applications. Nonlinear optical organic crystals exhibit great potential for intense broadband THz wave generation due to their large nonlinearities and advantageous phase-matching characteristics. However, the phonon-induced absorption of most organic crystals in the THz region leads to undesired modulation of the spectrum and limits the THz output efficiency. To overcome such drawbacks, phononmode engineering by modification of molecular structures is suggested, but intrinsic limitations still remain. Here, an efficient alternative approach has been recently proposed for generating intense broadband THz waves based on a tandem configuration that combines two complementary nonlinear organic crystals. Such configuration compensates for the spectral gap of the generated THz waves mainly caused by phonon absorption and additionally enhances the optical-to-THz conversion efficiency. The proposed organic tandem generator indicates a substantial enhancement of the peak-to-peak THz electric field due to effective spectral filling at phonon absorption gaps. As a result, such tandem configuration provides a versatile platform to generate gapless broadband THz spectra with suppressed phonon absorption and contributes to advancing the development of intense broadband coherent THz sources.

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Erratum: GV/m Single-Cycle Terahertz Fields from a Laser-Driven Large-Size Partitioned Organic Crystal [Phys. Rev. Lett. 112 , 213901 (2014)]

Cited by 63 publications

References 0 publications

Laser‐Driven Strong‐Field Terahertz Sources

Laser‐Driven Strong‐Field Terahertz Sources

Coherent Diffraction Radiation of Relativistic Terahertz Pulses from a Laser-Driven Microplasma Waveguide

New Class of Efficient Terahertz Generators: Effective Terahertz Spectral Filling by Complementary Tandem Configuration of Nonlinear Organic Crystals

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