Tunable terahertz-wave generation from DAST crystal by dual signal-wave parametric oscillation of periodically poled lithium niobate

Kawase, Kodo; Hatanaka, Takaaki; Takahashi, Hidenori; Nakamura, Koichiro; Taniuchi, T.; Ito, Hiromasa

doi:10.1364/ol.25.001714

Cited by 157 publications

(66 citation statements)

References 22 publications

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“…[64][65][66] By tuning the wavelength of one pump beam, THz radiation can be tuned too. In this way, a wide range of THz frequencies were achieved from a DAST crystal and multiple THz absorption bands were identified.…”

Section: Organic Eo Crystalsmentioning

confidence: 99%

Organic Broadband TeraHertz Sources and Sensors

Zheng¹,

McLaughlin²,

Cunningham³

et al. 2007

Journal of Nanoelectronics and Optoelectronics

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We review recent research using organic materials for generation and detection of broadband terahertz radiation (0.3 THz−30 THz). The main focus is on amorphous electrooptic (EO) polymers, with semiconducting polymers, molecular salt EO crystals, and molecular solutions briefly discussed. The advantages of amorphous EO polymers over other materials for broadband THz generation (via optical rectification) and detection (via EO sampling) include a lack of phonon absorption (good transparency) in the THz regime, high EO coefficient and good phase-matching properties, and, of course, easy fabrication (low cost). Our ∼12-THz, spectral gap-free THz system based on a polymer emitter-sensor pair is an excellent demonstration of the advantages using of EO polymers. We also present a model that can predict the performance of a polymer-based THz system. Both the dielectric properties of an EO polymer and laser pulse related parameters are included in the model, making the simulations close to real conditions. From our modeling work, the roles the dielectric properties play in the THz generation and detection are clearly seen, providing us with a good guide to select and design suitable EO polymers in the future.

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Section: Organic Eo Crystalsmentioning

confidence: 99%

Organic Broadband TeraHertz Sources and Sensors

Zheng¹,

McLaughlin²,

Cunningham³

et al. 2007

Journal of Nanoelectronics and Optoelectronics

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“…Recent progresses such as quantum-cascade lasers 5,6 , terahertz wave generation through a nonlinear crystal 7 and THz time-domain spectroscopy 8 are promoting this subject into one of the most rapidly growing fields. High performance devices to control and manipulate the THz radiation are in urgent demand to develop sophisticated imaging and communication system.…”

mentioning

confidence: 99%

Spatial Terahertz Modulator

Xie

Wang

et al. 2013

Sci Rep

126

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Terahertz (THz) technology is a developing and promising candidate for biological imaging, security inspection and communications, due to the low photon energy, the high transparency and the broad band properties of the THz radiation 1-3 . However, a major encountered bottleneck is lack of efficient devices to manipulate the THz wave, especially to modulate the THz wave front. A wave front modulator should allow the optical or electrical control of the spatial transmission (or reflection) of an input THz wave and hence the ability to encode the information in a wave front 4 . Here we propose a spatial THz modulator (STM) to dynamically control the THz wave front with photo-generated carriers. A computer generated THz hologram is projected onto a silicon wafer by a conventional spatial light modulator (SLM). The corresponding photo-generated carrier spatial distribution will be induced, which forms an amplitude hologram to modulate the wave front of the input THz beam. Some special intensity patterns and vortex beams are generated by using this method. This all-optical controllable STM is structure free, high resolution and broadband. It is expected to be widely used in future THz imaging and communication systems.S andwiched between the microwave and infrared, THz radiation has been notoriously difficult to produce, modulate and detect [1][2][3] . Recent progresses such as quantum-cascade lasers 5,6 , terahertz wave generation through a nonlinear crystal 7 and THz time-domain spectroscopy 8 are promoting this subject into one of the most rapidly growing fields. High performance devices to control and manipulate the THz radiation are in urgent demand to develop sophisticated imaging and communication system. The filters, absorbers and polarizers based on graphene, frequency selective surface, metamaterials and photonic crystals have been reported [9][10][11][12][13][14][15][16][17][18] . However, the wave front modulation devices are still lacking. Recently, a novel technology based on the metasurface has been demonstrated to generate the desired wave front distribution 19,20 . Unfortunately, the specific function of this kind of devices has been determined at the moment of their design and could not be flexibly changed any more. The SLM which has been widely used in the visible light band can optically or electrically control the spatial transmission (or reflection) of an input light beam and encode information in the wave front 4 . The SLM always plays an important role in optical information processing, three dimensional image display, optical interconnections and real-time beam shaping. Usually, the SLM is realized through liquid crystals, magneto-optic materials or deformable mirrors. However, such mechanisms cannot work well in the THz regime due to the lack of suitable materials and the size mismatching between the micro-machined components and the THz wavelength 21 . In order to obtain the STM, a novel technology needs to be explored.The STM requires an array of small building blocks that can independentl...

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“…These organic crystals are ideal for ultrawide band operation, and include 4-dimethylamino-N-methyl-4-stilbavolium tosylate (DAST) [88][89][90][91][92] or N-benzyl-2-methyl-4-nitroaniline (BNA) [93,94].…”

Section: Frequency Down-conversion Of Visible/infrared Light In Non-lmentioning

confidence: 99%

Terahertz Frequency Metrology for Spectroscopic Applications: a Review

Consolino

Bartalini

Natale

2017

J Infrared Milli Terahz Waves

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We provide an overview on terahertz (THz) frequency metrology, starting from the nowadays available continuous wave THz sources, discussing their main features such as tunability, spectral purity, and frequency referencing to the primary frequency standards. A comparison on the achieved results in high-precision molecular spectroscopy is given and discussed, and finally, a special emphasis poses on the future developments of this upcoming field.

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Tunable terahertz-wave generation from DAST crystal by dual signal-wave parametric oscillation of periodically poled lithium niobate

Cited by 157 publications

References 22 publications

Organic Broadband TeraHertz Sources and Sensors

Organic Broadband TeraHertz Sources and Sensors

Spatial Terahertz Modulator

Terahertz Frequency Metrology for Spectroscopic Applications: a Review

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