Generation of single-cycle terahertz pulse using Cherenkov phase matching with 4-dimethylamino-<i>N</i>′-methyl-4′-stilbazolium tosylate crystal

Uchida, Hirohisa; Oota, Kengo; Minami, Tsubasa; Takeya, Kei; Kawase, Kodo

doi:10.7567/apex.10.062601

Cited by 18 publications

(4 citation statements)

References 26 publications

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“…THz-wave generation by optical rectification in organic crystals has been first demonstrated using DAST in 1992 [133], followed by investigations in many different groups, initially only in DAST (see, e.g., Refs. [93,112,120,130,143,147,[153][154][155][156][157][158][159]), and later extended to other organic crystals, such as DSTMS (see, e.g., Refs. [72,76,79,81,93,94,160,161]), OH1 (see, e.g., Refs.…”

Section: Thz Sources Based On Optical Rectificationmentioning

confidence: 99%

Organic Crystals for THz Photonics

et al. 2019

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Organic crystals with second-order optical nonlinearity feature very high and ultra-fast optical nonlinearities and are therefore attractive for various photonics applications. During the last decade, they have been found particularly attractive for terahertz (THz) photonics. This is mainly due to the very intense and ultra-broadband THz-wave generation possible with these crystals. We review recent progress and challenges in the development of organic crystalline materials for THz-wave generation and detection applications. We discuss their structure, intrinsic properties, and advantages compared to inorganic alternatives. The characteristic properties of the most widely employed organic crystals at present, such as DAST, DSTMS, OH1, HMQ-TMS, and BNA are analyzed and compared. We summarize the most important principles for THz-wave generation and detection, as well as organic THz-system configurations based on either difference-frequency generation or optical rectification. In addition, we give state-of-the-art examples of very intense and ultra-broadband THz systems that rely on organic crystals. Finally, we present some recent breakthrough demonstrations in nonlinear THz photonics enabled by very intense organic crystalline THz sources, as well as examples of THz spectroscopy and THz imaging using organic crystals as THz sources for various scientific and technological applications.

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Section: Thz Sources Based On Optical Rectificationmentioning

confidence: 99%

Organic Crystals for THz Photonics

et al. 2019

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“…Recently, much attention has been drawn to organic-inorganic hybrid molecular crystals materials [1][2][3][4][5][6][7][8][9][10][11]. These materials are frequently characterized by their various physical and chemical properties, such as structural phase transition, ferroelectric, semiconductor, photovoltaic effect, nonlinear optical response and pyroelectricity, which have potential applications in molecular sensors, switches, data storage, electro optical modulators, light emitting, photo-detector, energy-efficient memories, filtering devices, high-performance insulators and so on [12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Growth and Property Investigations of Two Organic–Inorganic Hybrid Molecular Crystals with High Thermal Stability: 4-Iodoanilinium perchlorate 18-crown-6 and 4-Iodoanilinium Borofluorate 18-crown-6

et al. 2019

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Two new organic–inorganic hybrid molecular single crystals, 4-Iodoanilinium perchlorate 18-crown-6 (1) and 4-Iodoanilinium borofluorate 18-crown-6 (2), with large sizes and high thermal stability were successfully synthesized by solution method. Their structures, phase purities, thermal stability, dielectric, absorption and fluorescence spectra were systematically investigated for potential applications. Compounds 1 and 2 crystallize in orthorhombic crystal system, in same space group, namely Pnma. The thermal measurements shown 1 and 2 maintain high thermal stability up to 150 °C. The temperature dependency of dielectric constant was studied, and no distinct anomaly was observed. The band gap were calculated to be 3.38 eV and 3.57 eV for 1 and 2, respectively, slightly smaller than those of layer perovskite (benzylammonium)2PbCl4 semiconducting materials, which have potential applications in optoelectronic detection field. The investigations throw light on the semiconductor properties of organic–inorganic hybrid crown type material and provide two types of crown compounds with high thermal stability.

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“…To resolve this limitation, we used the Cherenkov phase matching method for THz wave generation. − This is an efficient THz wave generation method that makes use of the difference between the group refractive indices in the optical region and the THz region of the crystal, which has previously generated broadband THz waves at intensities 1000 times greater than those achievable using a photoconductive antenna (PCA). , Inorganic crystals easily fulfill the Cherenkov phase matching condition ( n THz > n opt ) for values of the refractive index n opt in the infrared region and n THz in the THz region relatively, , whereas these two indices are generally close to each other in organic NLO crystals. In the case of OH1, n opt in the optical region (at a wavelength of around 1 μm) is about 2.20 and that in the THz region (1–2 THz) is 2.30 .…”

Section: Introductionmentioning

confidence: 99%

Organic Nonlinear Optical Single-Crystalline Thin Film Grown by Physical Vapor Deposition for Terahertz Generation

Uchida

Yamazaki

Oota

et al. 2018

Crystal Growth & Design

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There are a number of advantages to terahertz (THz) waves by Cherenkov phase matching using a nonlinear optical (NLO) crystal; however, a thin crystal of micrometer-scale must be grown to satisfy the optimal phase matching conditions. Inorganic crystals with well-developed crystal growth and processing techniques have been widely used to date; however, THz wave generation with improved efficiency in the broadband region could be achieved with a single-crystalline thin film of an organic NLO material with a large NLO coefficient. Here, the growth of a crystalline thin film with a size of several microns using a very simple method is reported. Physical vapor deposition is used to grow a crystal of the organic nonlinear material 2-(3-(4-hydroxystyryl)-5,5-dimethylcyclohex-2-enylidene) malononitrile (OH1). This method is much simpler than the conventional crystal growth method. Additionally, the OH1 single-crystalline thin film grown by physical vapor deposition has a better crystalline character than a bulk OH1 crystal grown by the solution method. The OH1 single crystal grown by this technique demonstrates efficient THz wave generation and low absorption of THz waves by the crystal.

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Generation of single-cycle terahertz pulse using Cherenkov phase matching with 4-dimethylamino-N′-methyl-4′-stilbazolium tosylate crystal

Cited by 18 publications

References 26 publications

Organic Crystals for THz Photonics

Organic Crystals for THz Photonics

Growth and Property Investigations of Two Organic–Inorganic Hybrid Molecular Crystals with High Thermal Stability: 4-Iodoanilinium perchlorate 18-crown-6 and 4-Iodoanilinium Borofluorate 18-crown-6

Organic Nonlinear Optical Single-Crystalline Thin Film Grown by Physical Vapor Deposition for Terahertz Generation

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