Structural slow light can enhance Beer-Lambert absorption

Dicaire, Isabelle; Chin, Sang Hoon; Thévenaz, Luc

doi:10.1364/sl.2011.slwc2

Cited by 3 publications

(3 citation statements)

References 3 publications

(3 reference statements)

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“…As detailed in section 3.2, the effect ofslow light on the nonlinear coupling coefficient γ can be summarized, approximately, as a c v 0 g 2 ( ) scaling. Interestingly, the linear absorption scales as c v 0 g ( ), which has been experimentally confirmed (see for instance [26]). In conclusion, not only the choice of the material, but also the geometry of the waveguide has a strong influence on the nonlinear dynamics.…”

Section: Slow-light Field Enhancement and Structural Slow-light As Op...supporting

confidence: 53%

Photonic crystal waveguides based on wide-gap semiconductor alloys

Martin¹,

Combrié²,

Rossi³

2017

J. Opt.

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This review is devoted to integrated photonic platforms based on large band-gap semiconductors, alternatives to silicon photonics. The large electronic band gap of the material employed is chosen to address the specific needs of nonlinear optics, and, in particular, lower nonlinear losses and the capability of handling larger optical power densities. Moreover, these new platforms offer broader transmission spectra, extending to the visible spectral region, which is also required for other applications, particularly sensing and bio-related photonics. The focus is on nanoscale patterned waveguiding structures, which, owing to the tight confinement of light, have demonstrated a large nonlinear response. The third-order nonlinear response and the related parametric interactions will be considered here, encompassing four-wave mixing, phase-sensitive amplification, wavelength conversion, and also nonlinear pulse propagation and soliton dynamics. The comparison between different materials and waveguide design highlights specific features of photonic crystal waveguides.

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Section: Slow-light Field Enhancement and Structural Slow-light As Op...supporting

confidence: 53%

Photonic crystal waveguides based on wide-gap semiconductor alloys

Martin¹,

Combrié²,

Rossi³

2017

J. Opt.

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“…Current work has emphasized means of engineering PhC waveguides to minimize these sources of loss [23]. We also note that careful experimental studies performed by Thevenaz and coworkers have confirmed that linear absorption scales with the group index for structural but not material slow light [40,41].…”

Section: Structural Slow Lightmentioning

confidence: 68%

Material slow light and structural slow light: similarities and differences for nonlinear optics [Invited]

Boyd¹

2011

J. Opt. Soc. Am. B

136

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There are two standard methods for controlling the group velocity of light. One makes use of the dispersive properties associated with the resonance structure of a material medium. The other makes use of structural resonances, such as those that occur in photonic crystals. Both procedures have proved useful in a variety of situations. In this work we contrast these two approaches, especially in terms of issues such as the kinematics of energy flow though the system and the resulting implications for the behavior of nonlinear optical processes in these situations. Stated differently, this paper addresses the question of when nonlinear optical processes are enhanced through use of slow-light interactions and when they are not.

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“…The experiment is designed so that the molecular absorption and the slow light generation are negligibly correlated and can be controlled independently, as it could be done with the material slow light experiment. The macroscopic cavity can be conveniently opened or closed to operate either in standard or in slow-light regime, leaving the absorbing fibre segment untouched 13 . Closing the cavity results in delayed propagation and longer effective optical path lengths according to the cavity round-trip loss.…”

Section: Experimental Test Using Structural Slow Lightmentioning

confidence: 99%

Enhancing the light-matter interaction using slow light: towards the concept of dense light

Thévenaz

Dicaire

Chin

2012

Advances in Slow and Fast Light V

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A couple of experiments are here presented to clarify the impact of slow light on light-matter interaction. The experiments are designed, so that the process generating slow light and the probed light-matter interaction only present a marginal cross-effect. The impact of slow light on simple molecular absorption could be separately evaluated under either material or structural slow light propagation in the same medium and led to an entirely different response.

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Structural slow light can enhance Beer-Lambert absorption

Abstract: We experimentally demonstrate that structural slow light can enhance Beer-Lambert absorption. A 4-fold reduction of the group velocity induced by mere cavity effects has caused an increase of molecular absorption by 130%.

Cited by 3 publications

References 3 publications

Photonic crystal waveguides based on wide-gap semiconductor alloys

Photonic crystal waveguides based on wide-gap semiconductor alloys

Material slow light and structural slow light: similarities and differences for nonlinear optics [Invited]

Enhancing the light-matter interaction using slow light: towards the concept of dense light

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