Efficient terahertz generation and detection using CdTe crystal pumped by ultrafast Ytterbium laser

Ropagnol, X.; Matoba, M.; Nkeck, Joel Edouard; Blanchard, F.; Isgandarov, E.; Yumoto, Junji; Ozaki, T.

doi:10.1109/irmmw-thz.2019.8873989

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…The DC biased homodyne scheme enables the performing of the SSBCD technique with very simple and cost-effective equipment, thus allowing non-specialized users (e.g., biologists, chemists, material scientists) to benefit in their THz field-resolved applications from an ultra-broadband coherent detection method. Finally, we envision that our technique will be particularly suitable to detect THz pulses generated via various techniques exploiting the emerging technology of high-repetition rate (>100 kHz) Ytterbium lasers [ 37 , 38 , 39 , 40 ].…”

Section: Discussionmentioning

confidence: 99%

Homodyne Solid-State Biased Coherent Detection of Ultra-Broadband Terahertz Pulses with Static Electric Fields

et al. 2021

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We present an innovative implementation of the solid-state-biased coherent detection (SSBCD) technique, which we have recently introduced for the reconstruction of both amplitude and phase of ultra-broadband terahertz pulses. In our previous works, the SSBCD method has been operated via a heterodyne scheme, which involves demanding square-wave voltage amplifiers, phase-locked to the THz pulse train, as well as an electronic circuit for the demodulation of the readout signal. Here, we demonstrate that the SSBCD technique can be operated via a very simple homodyne scheme, exploiting plain static bias voltages. We show that the homodyne SSBCD signal turns into a bipolar transient when the static field overcomes the THz field strength, without the requirement of an additional demodulating circuit. Moreover, we introduce a differential configuration, which extends the applicability of the homodyne scheme to higher THz field strengths, also leading a two-fold improvement of the dynamic range compared to the heterodyne counterpart. Finally, we demonstrate that, by reversing the sign of the static voltage, it is possible to directly retrieve the absolute THz pulse polarity. The homodyne configuration makes the SSBCD technique of much easier access, leading to a vast range of field-resolved applications.

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Section: Discussionmentioning

confidence: 99%

Homodyne Solid-State Biased Coherent Detection of Ultra-Broadband Terahertz Pulses with Static Electric Fields

et al. 2021

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“…Since the EOS method generally requires a low level of probe light to operate in linear mode, i.e. by avoiding a two-photon absorption in the detector, 17) increasing the power of the probing light is often impractical.…”

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confidence: 99%

Electro-optical detection of terahertz radiation in a zinc sulphide crystal at a wavelength of 512 nm

Nkeck¹,

Ropagnol²,

Nechache³

et al. 2020

Appl. Phys. Express

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The electro-optical sampling method is a widely used technique for the detection of terahertz (THz) waves. During the last thirty years, various electro-optical sensors have been proposed, but mainly working with a near-infrared probe. Here we demonstrate efficient detection of terahertz radiation up to 2.5 THz using a (110)-cut zinc sulfide (ZnS) crystals with the second harmonic of an amplified solid-state ytterbium laser beam at 512 nm. To validate its characteristics, we compare its performance with that of the cadmium telluride (CdTe) crystal probed at the fundamental wavelength of the laser.

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Efficient terahertz generation and detection using CdTe crystal pumped by ultrafast Ytterbium laser

Cited by 2 publications

References 3 publications

Homodyne Solid-State Biased Coherent Detection of Ultra-Broadband Terahertz Pulses with Static Electric Fields

Homodyne Solid-State Biased Coherent Detection of Ultra-Broadband Terahertz Pulses with Static Electric Fields

Electro-optical detection of terahertz radiation in a zinc sulphide crystal at a wavelength of 512 nm

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