Absorption from Thin-Film Waveguides*

Polky, J. N.; Harris, J. H.

doi:10.1364/josa.62.001081

Cited by 27 publications

(7 citation statements)

References 6 publications

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“…30,31 Another approach, which is frequently employed in optical fiber configurations, is the perturbation analysis. [32][33][34][35] In this technique, the waveguide loss is calculated by the fraction of the modal power inside the absorbing region. Stewart and Culshaw 36 used a ray optics approach and the Fresnel reflection coefficient to describe the case of bulk-cladding absorption in the waveguide configuration at the TE polarization.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of absorbance calculations for integrated optical waveguide configurations by use of the ray optics model and the electromagnetic wave theory

Mendes

Saavedra

2000

Appl. Opt.

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Focusing on the use of planar waveguides as platforms for highly sensitive attenuated total reflection spectroscopy of organic thin films, we extend the ray optics model to provide absorbance expressions for the case of dichroic layers immobilized on the waveguide surface. Straightforward expressions are derived for the limiting case of weakly absorbing, anisotropically oriented molecules in the waveguide-cladding region. The second major focus is on the accuracy of the ray optics model. This model assumes that the introduction of absorbing species, either in the bulk cladding or as an adlayer on the waveguide surface, only causes a small perturbation to the original waveguide-mode profile. We investigate the accuracy of this assumption and the conditions under which it is valid. A comparison to an exact calculation by use of the electromagnetic wave theory is implemented, and the discrepancy of the ray optics model is determined for various waveguide configurations. We find that in typical situations in which waveguide-absorbance measurements are used to study organic thin films (k(l)/n(l)

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Section: Introductionmentioning

confidence: 99%

Comparative analysis of absorbance calculations for integrated optical waveguide configurations by use of the ray optics model and the electromagnetic wave theory

Mendes

Saavedra

2000

Appl. Opt.

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“…Displaced cationic dyes have been used to quantitate metal displacement of the dye from the surface of bulk silica (ref. 17,18). In these studies bulk silica gel was equilibrated with the appropriate dye for several days.…”

Section: Metal Ion Exchange At Silica Surfacementioning

confidence: 99%

<title>Direct exchange of metal ions onto silica waveguides</title>

Petersen

Dessy

1991

SPIE Proceedings

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“…The sensitivity enhancement makes it possible to measure attenuated total reflection 1ATR2 from interfacial samples that would otherwise be problematic. Examples include dissolved and adsorbed dyes, [4][5][6][7] adsorbed protein films, 8,9 and Langmuir-Blodgett films. 10 The major disadvantage of measuring ATR with planar waveguides is spectral bandwidth.…”

Section: Introductionmentioning

confidence: 99%

70-nm-bandwidth achromatic waveguide coupler

Mendes

Burke

et al. 1995

Appl. Opt.

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We report a general approach to the design of broadband waveguide couplers. A double-parallel grating assembly is used to cancel the first chromatic order, and a proper choice of prism glass and base angle is made to compensate for the second chromatic order. The technique was applied to a Corning glass 7059 waveguide, and a spectral bandwidth of 70 nm was measured by the use of two complementary procedures.

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Absorption from Thin-Film Waveguides*

Cited by 27 publications

References 6 publications

Comparative analysis of absorbance calculations for integrated optical waveguide configurations by use of the ray optics model and the electromagnetic wave theory

Comparative analysis of absorbance calculations for integrated optical waveguide configurations by use of the ray optics model and the electromagnetic wave theory

<title>Direct exchange of metal ions onto silica waveguides</title>

70-nm-bandwidth achromatic waveguide coupler

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