Single photon nonlinear absorption spectroscopy of cascade energy level systems

Rao, A.S.

doi:10.1016/j.ijleo.2018.10.197

Cited by 6 publications

(2 citation statements)

References 23 publications

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“…Three-level cascade systems [32][33][34][35] contain three energy levels, and the absorption and the emission takes place in a cascade. The energy level diagram of the three-level cascade system is given in the inset of Fig.…”

Section: Three-level Cascade Systemmentioning

confidence: 99%

Nonlinear behavior of the population dynamics of three-level systems in the presence of single photon absorption

Rao¹

2019

Chinese Phys. B

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We numerically investigate the population dynamics in a single photon resonant three-level cascade and non-cascade energy level molecules at 532-nm wavelength. The time-dependent population in the energy levels in the presence of 100 ps (pico-second) and 100 ns (nano-second) laser pulses is described in the form of rate equations. We provide a brief idea of how the optical energy transfer takes place in the light-matter interaction and we also discuss the absorption as a function of pulse width and repetition rate. We also plot the z-scan transmittance curve as a function of number of excitation pulses participating in the absorption.

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Section: Three-level Cascade Systemmentioning

confidence: 99%

Nonlinear behavior of the population dynamics of three-level systems in the presence of single photon absorption

Rao¹

2019

Chinese Phys. B

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“…In nonlinear light-matter interaction, nonlinear absorption has played a pivotal role in the applications of nonlinear optics since its advent [1][2][3]. Owing to the advent of new nonlinear materials, the prominent applications of the nonlinear absorp tion property of condensed matter are saturable absorption [4][5][6], optical limiting [7][8][9] and nonlinear absorption spectr oscopy [10][11][12]. The last few decades have seen a resurgence of interest in nonlinear absorption due to their wide range of applications in the material world [13,14].…”

Section: Introductionmentioning

confidence: 99%

Analysis of multi-photon absorption: z-scan using ultra-short Gaussian vortex beam

Allam

2019

Laser Phys.

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We present a detailed theoretical investigation of the Gaussian vortex beam zscan to look over multiphoton absorption. For a fixed optical pump power, the material shows less optical limiting nature in the presence of a Gaussian vortex beam as compared with a conventional Gaussian beam. In the presence of ultrashort laser pulses, the central dark core of a Gaussian vortex beam can provide a stable and accurate zscan profile preventing thermal degradation of the sample and the contribution of other nonlinear optical phenomena. The large cross sectional area at the beam waist with the large divergence of the Gaussian vortex beam can be used for the zscan in the short range of propagation. Though discussed for multiphoton absorption, it may extend to singlephoton absorption in the presence of multiple energy levels participating in the absorption process.

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Nonlinear spectroscopy of three-level cascade systems in the act of saturable and reverse saturable absorption

Rao

2019

Optik

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Single photon nonlinear absorption spectroscopy of cascade energy level systems

Cited by 6 publications

References 23 publications

Nonlinear behavior of the population dynamics of three-level systems in the presence of single photon absorption

Nonlinear behavior of the population dynamics of three-level systems in the presence of single photon absorption

Analysis of multi-photon absorption: z-scan using ultra-short Gaussian vortex beam

Nonlinear spectroscopy of three-level cascade systems in the act of saturable and reverse saturable absorption

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