Studies on Two-Photon Absorption of  Aniline Using Thermal Lens Effect

Kurian, Achamma; Lee, S. Thomas; Unnikrishnan, K. P.; George, Dileep; Nampoori, V. P. N.; Vallabhan, C. P. G.

doi:10.1142/s0218863503001213

Cited by 15 publications

(1 citation statement)

References 23 publications

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“…The temperature distribution in the medium mimics the beam profile of the excitation beam and hence a refractive index gradient is created in the medium. Due to this modification in the refractive index, the medium will act as a thermal lens (TL) [6,[14][15][16]. The TL generally has a negative focal length since most materials expand upon heating and hence there is a negative temperature coefficient of the refractive index.…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticle assisted urine sugar determination using thermal lens spectroscopy

Thomas¹,

John²,

George³

et al. 2014

Meas. Sci. Technol.

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Nanotechnology plays a vital role in the development of biosensors by enhancing their sensitivity and performance. In this paper, we report a novel urine sugar sensing method that makes use of the unique properties of silver-nanofluids in combination with the laser induced photothermal lens technique. The thermal lens signal decreases with increase in sugar levels in urine samples, which may be attributed to the enhanced interaction of glucose and conduction electrons of silver-nanoparticles, thereby changing the surface plasmon energy.

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Section: Introductionmentioning

confidence: 99%

Silver nanoparticle assisted urine sugar determination using thermal lens spectroscopy

Thomas¹,

John²,

George³

et al. 2014

Meas. Sci. Technol.

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Characterization of2PAChromophores

Stryland

Hagan

2016

Multiphoton Lithography

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The Characterization of Absorptive Nonlinearities

Λιάρος

Fourkas

2017

Laser & Photonics Reviews

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The measurement of the order and magnitude of absorptive nonlinearities is essential to the development and improvement of a wide range of optical materials. This review presents and contrasts some of the most commonly used methods for making such measurements. As background, we introduce the history of, and the essential physics behind, multiphoton absorption (MPA) and phenomena that can interfere with its measurement. We review methods for the direct and indirect measurement of MPA. The direct methods covered include nonlinear transmission, absorption modulation, Z-scan, and spectrally-resolved, two-beam coupling. The indirect methods reviewed, all of which rely on the measurement of multiphoton action cross sections, include nonlinear fluorescence excitation, thermal lensing, MPA-induced photocurrent, and various techniques for determining the order of effective nonlinear absorption in multiphoton absorption polymerization.

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Studies on Two-Photon Absorption of Aniline Using Thermal Lens Effect

Abstract: Two-photon absorption spectrum of aniline is recorded using thermal lens effect with optical parametric oscillator as the pump source. Studies show that the two-photon absorption spectrum observed corresponds to 1A1 → 1B2 transition of aniline.

Cited by 15 publications

References 23 publications

Silver nanoparticle assisted urine sugar determination using thermal lens spectroscopy

Silver nanoparticle assisted urine sugar determination using thermal lens spectroscopy

Characterization of2PAChromophores

The Characterization of Absorptive Nonlinearities

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