DAST/SiO_2 multilayer structure for efficient generation of 6 THz quasi-single-cycle electromagnetic pulses

Степанов, А. Л.; Bonacina, Luigi; Wolf, Jean‐Pierre

doi:10.1364/ol.37.002439

Cited by 13 publications

(10 citation statements)

References 25 publications

(35 reference statements)

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“…The use of a DAST/SiO 2 multilayer structure allows employing the 111 OR  = 1230 pV/m of DAST [21] at 0.8 m which is significantly higher than that at 1.5 m (490 pV/m) [21]. In a previous paper [18], it was speculated that the use of femtosecond laser pulses at 800 nm rather than two monochromatic waves would provide generation of near-single-cycle THz pulses in a DAST/SiO 2 multilayer structure. However, the time profiles and spectra of THz pulses obtained with this method were not explicitly shown.…”

mentioning

confidence: 92%

A review of non-linear terahertz spectroscopy with ultrashort tabletop-laser pulses

Hwang

Fleischer

Brandt

et al. 2014

Journal of Modern Optics

139

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We present a numerical parametric study of single-cycle electromagnetic pulse generation in a DAST/SiO 2 multilayer structure via collinear optical rectification of 800 nm femtosecond laser pulses. It is shown that modifications of the thicknesses of the DAST and SiO 2 layers allow tuning of the average frequency of the generated THz pulses in the frequency range from 3 to 6 THz. The laser-to-THz energy conversion efficiency in the proposed structures is compared with that in a bulk DAST crystal and a quasi-phase-matching periodically poled DAST crystal and shows significant enhancement., "Off-resonant magnetization dynamics phase-locked to an intense phase-stable terahertz transient," Nature Photon. 7(9), 720-723 (2013). 4. N. Stojanovic and M. Drescher, "Accelerator-and laser-based sources of high-field terahertz pulses," J.

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mentioning

confidence: 92%

A review of non-linear terahertz spectroscopy with ultrashort tabletop-laser pulses

Hwang

Fleischer

Brandt

et al. 2014

Journal of Modern Optics

139

View full text Add to dashboard Cite

show abstract

“…It was found that in order to obtain a high pump-to-THz energy conversion efficiency (up to 2% [16]) in many organic salt crystals, the application of femtosecond laser pulses at 1.2−1.5 m is required. Alternatively the use of a DAST/SiO 2 multilayer structure for efficient generation of near single cycle pulses with an average frequency of 6 THz via collinear optical rectification of 800 nm femtosecond laser pulses was proposed [20].…”

Section: Introductionmentioning

confidence: 99%

Generation of broadband THz pulses in organic crystal OH1 at room temperature and 10 K

Степанов

Ruchert

Levallois

et al. 2014

Opt. Mater. Express

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Abstract:We studied the effects of cryogenic cooling of a 2-[3-(4-hydroxystyryl)-5, 5-dimethylcyclohex-2-enylidene] malononitrile (OH1) crystal on the generation of broadband THz pulses via collinear optical rectification of 1350 nm femtosecond laser pulses. Cooling of the OH1 crystal from room temperature to 10 K leads to a ~10% increase of the pump-to-THz energy conversion efficiency and a shift of the THz pulse spectra to a higher frequency range. Both effects are due the temperature variation of THz absorption and the refractive index of the OH1 crystal. This conclusion has been verified by temperature dependent measurements of the linear absorption in the THz frequency region. An approach to obtain a stronger increase of the THz generation efficiency at cryogenic cooling of the OH1 crystal is discussed. terahertz pulses by optical rectification," Opt. Lett. 37(4), 557-559 (2012). 11. J. Hebling, G. Almási, I. Kozma, and J. Kuhl, "Velocity matching by pulse front tilting for large area THz-pulse generation," Opt. Express 10(21), 1161-1166 (2002). 12. A. G. Stepanov, J. Hebling, and J. Kuhl, "Efficient generation of subpicosecond terahertz radiation by phasematched optical rectification using ultrashort laser pulses with tilted pulse fronts," Appl. Phys. Lett. 83(15), 3000-3002 (2003).

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“…It was found that in order to obtain a high pump-to-THz energy conversion efficiency (up to 2% [14]) in many organic salt crystals, the application of femtosecond laser pulses at 1.2−1.5 µm is required. The use of a DAST/SiO 2 multilayer structure for efficient generation of near single cycle pulses with an average frequency of 6 THz via collinear optical rectification of 800 nm femtosecond laser pulses was also proposed [18].…”

Section: Introductionmentioning

confidence: 99%

High field broadband THz generation in organic materials

Vicario

Ruchert

Hauri

2013

Journal of Modern Optics

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Organic salt crystals, e.g. DAST, OH1, and DSTMS, pumped by ultra-short infrared laser are efficient THz emitters. We review our latest results on the generation in organic crystals of THz single-cycle transients with field strength of 1.5 MV/cm. The energy conversion reaches 2% with photon conversion efficiency up to 200%. THz radiation produced in such crystals offers excellent beam propagation properties and can be focused down to diffraction limited spot size in order to realize the highest field. This source covers the full spectral range between 0.1 and 10 THz. Further, we discuss the possibility to control the absolute phase and the polarity of the THz field.

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DAST/SiO_2 multilayer structure for efficient generation of 6 THz quasi-single-cycle electromagnetic pulses

Cited by 13 publications

References 25 publications

A review of non-linear terahertz spectroscopy with ultrashort tabletop-laser pulses

A review of non-linear terahertz spectroscopy with ultrashort tabletop-laser pulses

Generation of broadband THz pulses in organic crystal OH1 at room temperature and 10 K

High field broadband THz generation in organic materials

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