A Single-shot Terahertz Time-domain Spectroscopy Instrument for Intense Laser System

Jin, Zuanming; Wada, Atsuo; Shin, Jung H.; Yugami, Noboru; Kodama, R.

doi:10.1088/1742-6596/688/1/012040

Cited by 8 publications

(6 citation statements)

References 12 publications

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“…This results in large phase differences and makes it difficult to accurately image all the step surfaces simultaneously on an image plane. Therefore, the maximum time window reported by the echelon encoding strategy is ∼37.7 ps [15], which is shorter than that of the other two strategies.…”

Section: Introductionmentioning

confidence: 85%

“…In general, the single-shot pump-probe technique encodes the time delay into a single probe pulse using spatial or spectral strategies. Currently, the commonly used encoding strategies include the angle beam encoding strategy [1,2,[6][7][8], spectral encoding strategy [9][10][11][12], and echelon encoding strategy [3,5,[13][14][15][16]. The angle beam encoding strategy utilizes the crossed line focus of the pump beam and probe beam on the sample plane, and the time delay is encoded along the focal line.…”

Section: Introductionmentioning

confidence: 99%

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Single-shot pump-probe technique by the combination of an echelon and a grating with a time window of 109 ps

Yu,

Yang,

et al. 2024

J. Opt.

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In this study, using only a single pulse, pump-probe measurement with a large time window of more than 100 ps is implemented. A commercial grating is used to encode a time window of ~ 56 ps in a single pulse; therefore, there is no need for machining customization. In addition, in this technique, the grating surface is accurately imaged, eliminating the image blur problem caused by phase differences in previous echelon-based techniques. Moreover, to make full use of the grating surface and obtain a larger time window, a simple reflection echelon is combined that matches the grating in the time window. This combination encoding strategy results in a total time window of ~ 109 ps and maintains accurate imaging of the grating surface. This time window is an order of magnitude greater than the maximum reported values of the echelon encoding strategy and the angle beam encoding strategy. To demonstrate this single-shot pump-probe technique, the two-photon absorption process of ZnSe and the excited-state absorption process of a symmetrical phenoxazinium bromine salt were studied. The possibility of further improving the experimental setup is also discussed.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Single-shot pump-probe technique by the combination of an echelon and a grating with a time window of 109 ps

Yu,

Yang,

et al. 2024

J. Opt.

View full text Add to dashboard Cite

show abstract

“…In this strategy, the time delay is mapped to different spatial positions of the probe beam, and then the intensity distribution of the probe beam is recorded by using the CCD/CMOS camera, thereby realizing single-shot dynamic measurements. At present, the main spatial encoding strategies include the echelon encoding strategy [2][3][4][5][6][7], angle beam encoding strategy [8][9][10][11][12], and grating encoding strategy [13][14][15][16]. As far as we know, the reported maximum time window of the echelon coding strategy is ~ 37.7 ps, and the phase difference of the echelon surface can lead to the image blurring problem, which is the main reason that limits the larger time window for the echelon encoding strategy [6].…”

Section: Introductionmentioning

confidence: 99%

“…At present, the main spatial encoding strategies include the echelon encoding strategy [2][3][4][5][6][7], angle beam encoding strategy [8][9][10][11][12], and grating encoding strategy [13][14][15][16]. As far as we know, the reported maximum time window of the echelon coding strategy is ~ 37.7 ps, and the phase difference of the echelon surface can lead to the image blurring problem, which is the main reason that limits the larger time window for the echelon encoding strategy [6].…”

Section: Introductionmentioning

confidence: 99%

Dual-grating single-shot pump-probe technique

Tianchen,

Yang,

et al. 2024

Preprint

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A simple and effective single-shot pump-probe technique is reported. Using only two commercial gratings, a large time window of 95.4 ps is spatially encoded in a single probe pulse, and single-shot time-resolved measurements are implemented. The time window exceeds the maximum reported values for single-shot pump-probe techniques using the echelon or angle beam encoding strategy. The phase difference problem in the echelon encoding strategies is also eliminated and a customized echelon is not needed in this technique. The measurements of the ultrafast two-photon absorption dynamic of ZnSe at a wavelength of 650 nm verify the effectiveness of this technique.

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“…In this strategy, the time delay is mapped to different spatial positions of the probe beam, and then the intensity distribution of the probe beam is recorded using a CCD/CMOS camera, thereby realizing single-shot dynamic measurements. At present, the main spatial encoding strategies include the echelon encoding strategy [6,7,[9][10][11][12], angle beam encoding strategy [13][14][15][16][17], and grating encoding strategy [18][19][20][21]. As far as we know, the reported maximum time window of the echelon coding strategy is ~ 37.7 ps, and the phase difference of the echelon surface can lead to the image blurring problem, which is the main reason that limits the larger time window for the echelon encoding strategy [11].…”

Section: Introductionmentioning

confidence: 99%

Dual-grating single-shot pump-probe technique

Tianchen,

Yang,

et al. 2024

Preprint

View full text Add to dashboard Cite

A simple and effective single-shot pump-probe technique is reported for studying the ultrafast dynamic processes in various materials. Using only two commercial gratings, a large time window of ~ 95.58 ps is spatially encoded in a single probe pulse, and single-shot time-resolved measurements are implemented. This time window exceeds the maximum reported values for single-shot pump-probe techniques using the echelon or angle beam encoding strategy. The phase difference problem in the echelon encoding strategies is also eliminated and a customized echelon is not needed in this technique. The ultrafast dynamic processes of ZnSe and indolium squaraine at a wavelength of 650 nm were investigated using this technique.

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A Single-shot Terahertz Time-domain Spectroscopy Instrument for Intense Laser System

Cited by 8 publications

References 12 publications

Single-shot pump-probe technique by the combination of an echelon and a grating with a time window of 109 ps

Single-shot pump-probe technique by the combination of an echelon and a grating with a time window of 109 ps

Dual-grating single-shot pump-probe technique

Dual-grating single-shot pump-probe technique

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