Time-resolved optical Kerr-effect investigation on CS2/polystyrene mixtures

Heisler, Ismael A.; Correia, Ricardo Rego Bordalo; Buckup, Tiago; Cunha, Silvio Luiz Souza; Silveira, Nádya Pesce da

doi:10.1063/1.1994850

Cited by 30 publications

(26 citation statements)

References 32 publications

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“…For samples that do exhibit intensity changes in the time-domain, more complete models that take quantum mechanics into account must be employed [25]. However, the R6G solution is subject to both resonant and dispersive effects (which have not been derived from first principles [22,23]), thus no attempts are made in this work to model the cumulative effects.…”

Section: Theorymentioning

confidence: 99%

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Pump-probe nonlinear phase dispersion spectroscopy

Robles¹,

Samineni²,

Wilson³

et al. 2013

Opt. Express

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Pump-probe microscopy is an imaging technique that delivers molecular contrast of pigmented samples. Here, we introduce pump-probe nonlinear phase dispersion spectroscopy (PP-NLDS), a method that leverages pump-probe microscopy and spectral-domain interferometry to ascertain information from dispersive and resonant nonlinear effects. PP-NLDS extends the information content to four dimensions (phase, amplitude, wavelength, and pump-probe time-delay) that yield unique insight into a wider range of nonlinear interactions compared to conventional methods. This results in the ability to provide highly specific molecular contrast of pigmented and non-pigmented samples. A theoretical framework is described, and experimental results and simulations illustrate the potential of this method. Implications for biomedical imaging are discussed.

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Section: Theorymentioning

confidence: 99%

“…These three terms usually take the form of single or double exponentials with a buildup response time. For the exact form used in this work for CS 2 and water, we refer the readers to refs [23] and [24], respectively [the signals are shown graphically in Fig. 2(d)].…”

Section: Theorymentioning

confidence: 99%

Pump-probe nonlinear phase dispersion spectroscopy

Robles¹,

Samineni²,

Wilson³

et al. 2013

Opt. Express

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“…1(c) and 1(d). Figure 1(c) also plots the various processes (dashed lines) that contribute to the total response (red line) for CS 2 , as modeled by Heisler et al [15]. This provides a benchmark for the quantitative abilities of this approach.…”

Section: Two-field Pulse Trainmentioning

confidence: 93%

“…The samples are carbon disulfide (CS 2 ) and pure water, each placed in separate cuvettes. These are chosen since their OKE dynamics have been well studied [15,16]; further, water is a good benchmark for potential biological applications. Glass is also used to model the electronic response.…”

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confidence: 99%

Femtosecond pulse shaping enables detection of optical Kerr-effect (OKE) dynamics for molecular imaging

2014

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We apply femtosecond pulse shaping to generate optical pulse trains that directly access a material’s nonlinear refractive index (n2) and can thus determine time-resolved optical Kerr-effect (OKE) dynamics. Two types of static pulse trains are discussed: The first uses two identical fields delayed in time, plus a pump field at a different wavelength. Time-resolved OKE dynamics are retrieved by monitoring the phase of the interference pattern produced by the two identical fields in the Fourier-domain (FD) as a function of pump–probe–time–delay (where the probe is one of the two identical fields). The second pulse train uses three fields with equal time delays, but with the center field phase shifted by π/2. In this pulse scheme, changes on a sample’s nonlinear refractive index produce a new frequency in the FD signal, which in turn yields background-free intensity changes in the conjugate (time) domain and provides superior signal-to-noise ratios. The demonstrated sensitivity improvements enable, for the first time to our knowledge, molecular imaging based on OKE dynamics.

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“…Most of the OKE time-gated imaging setups discussed in the literature employ a crossedbeam geometry in order to spatially separate the pump and image light [13][14][15][16]. The spatial overlap of the pump beam on the probe beam covers an area inside the Kerr medium corresponding to a constant time.…”

Section: Collinear Oke Time-gatingmentioning

confidence: 99%

Collinear, two-color optical Kerr effect shutter for ultrafast time-resolved imaging

Purwar¹,

Idlahcen²,

Rozé³

et al. 2014

Opt. Express

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Imaging with ultrashort exposure times is generally achieved with a crossed-beam geometry. In the usual arrangement, an off-axis gating pulse induces birefringence in a medium exhibiting a strong Kerr response (commonly carbon disulfide) which is followed by a polarizer aligned to fully attenuate the on-axis imaging beam. By properly timing the gate pulse, imaging light experiences a polarization change allowing time-dependent transmission through the polarizer to form an ultrashort image. The crossed-beam system is effective in generating short gate times, however, signal transmission through the system is complicated by the crossing angle of the gate and imaging beams. This work presents a robust ultrafast time-gated imaging scheme based on a combination of type-I frequency doubling and a collinear optical arrangement in carbon disulfide. We discuss spatial effects arising from crossed-beam Kerr gating, and examine the imaging spatial resolution and transmission timing affected by collinear activation of the Kerr medium, which eliminates crossing angle spatial effects and produces gate times on the order of 1 ps. In addition, the collinear, two-color system is applied to image structure in an optical fiber and a gasoline fuel spray, in order to demonstrate image formation utilizing ballistic or refracted light, selected on the basis of its transmission time. 16, 1868-1870 (1991). 9. K. M. Yoo, Q. Xing, and R. R. Alfano, "Imaging objects hidden in highly scattering media using femtosecond second-harmonic-generation cross-correlation time gating," Opt. Lett. 16, 1019Lett. 16, -1021Lett. 16, (1991. 10. S. Idlahcen, C. Rozé, L. Méès, T. Girasole, and J.-B. Blaisot, "Sub-picosecond ballistic imaging of a liquid jet,"Exp. Fluids 52, 289-298 (2011). 11. L. Wang, P. Ho, C. Liu, G. Zhang, and R. Alfano, "Ballistic 2-d imaging through scattering walls using an ultrafast optical Kerr gate," Science 253, 769-771 (1991). 12. R. Alfano, ed., Semiconductors probed by ultrafast laser spectroscopy (Academic, 1984, vol. II

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Time-resolved optical Kerr-effect investigation on CS2/polystyrene mixtures

Cited by 30 publications

References 32 publications

Pump-probe nonlinear phase dispersion spectroscopy

Pump-probe nonlinear phase dispersion spectroscopy

Femtosecond pulse shaping enables detection of optical Kerr-effect (OKE) dynamics for molecular imaging

Collinear, two-color optical Kerr effect shutter for ultrafast time-resolved imaging

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