Determination of the optical permittivity and thickness of absorbing films using long range modes

Yang, F.; Sambles, J. R.

doi:10.1080/09500349708230726

Cited by 117 publications

(57 citation statements)

References 10 publications

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“…When an optical waveguide is coated with a thin-film, the propagation of light is affected. Different types of electromagnetic resonances can be observed depending on the dielectric properties of the different materials involved in the system (waveguide, thin-film and surrounding medium) [7]. Surface Plasmon Resonance (SPR) is one of the most widely studied optical techniques [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…Different types of electromagnetic resonances can be observed depending on the dielectric properties of the different materials involved in the system (waveguide, thin-film and surrounding medium) [7]. Surface Plasmon Resonance (SPR) is one of the most widely studied optical techniques [7,8]. SPRs occur when the real part of the thin-film permittivity is negative and higher in magnitude than both its own imaginary part and the permittivity of the material surrounding the thin-film [7].…”

Section: Introductionmentioning

confidence: 99%

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High sensitive refractometers based on lossy mode resonances (LMRs) supported by ITO coated D-shaped optical fibers

et al. 2015

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Tin doped indium oxide (ITO) coatings fabricated onto D-shaped optical fibers are presented as the supporting medium for Lossy Mode Resonances (LMRs) generation. The characteristic geometry of ITO-coated D-shaped optical fibers enables to observe experimentally LMRs obtained with both TM and TE polarized light (LMR(TM) and LMR(TE)). This permits to obtain a maximum transmission decay of 36 dB with a LMR spectral width of 6.9 nm, improving that obtained in previous works, where the LMRs were a combination of an LMR(TM) and an LMR(TE). Surrounding medium refractive index (SMRI) sensitivity characterization of LMR(TM) has been performed obtaining a maximum sensitivity of 8742 nm/RIU in the range 1.365-1.38 refractive index units (RIU) which overcomes that of surface plasmon resonance-based optical fiber devices presented in recent works.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High sensitive refractometers based on lossy mode resonances (LMRs) supported by ITO coated D-shaped optical fibers

et al. 2015

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“…obtained when the real part of the thin-film permittivity is negative and higher in magnitude than both its own imaginary part and the permittivity of the material surrounding the thinfilm, whereas LMRs occur when the real part of the thin-film permittivity is positive and higher in magnitude than both its own imaginary part and the material surrounding the thin-film [3,6]. In view of the previous conditions, one would think that it is not possible to simultaneously observe both phenomena, SPR and LMR.…”

mentioning

confidence: 99%

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Fuentes

Corres

Matı́as

et al. 2019

J. Lightwave Technol.

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Lossy mode resonances (LMRs) are typically obtained with optical fibre. The Kretschmann configuration is an alternative but LMRs are generated with angles approaching grazing incidence. In this work, a new setup is explored, based on the lateral incidence of light on conventional planar waveguides such as glass slides or coverslips. Indium tin oxide was deposited onto both types of waveguides generating LMRs. The results of the simulations carried out agree well with the experimental results. As an example of the potential of this new and simple optical configuration, a humidity sensor with a sensitivity of 0.212 nm/%RH in the range from 65 to 90% of RH was developed, which expedites the development of other types of sensors already explored with LMR based optical fibre sensors.

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“…Depending on the properties of the materials involved in the system (the waveguide, the coating and the external medium), different cases of electromagnetic resonances can be distinguished [1], [2]. If the real p art of the thin-film permittivity is positive and higher in magnitude than both its own imaginary part and the permittivity of the material surrounding the thin film, a LMR is generated [2], [5]. These LMRs produce an absorption band in the transmitted spectrum at a determined wavelength.…”

Section: Introductionmentioning

confidence: 99%

Lossy Mode Resonance Generation by Graphene Oxide Coatings Onto Cladding-Removed Multimode Optical Fiber

2019

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In this work, we have studied the suitability of graphene oxide -based thin films to be not only excellent sensitive coatings but also lossy mode resonance (LMR)-generating materials. Thin films of graphene oxide (GO) and polyethylenimine (PEI) fabricated by means of layer-by-layer assembly were selected in this study. Two optical fiber devices with 8 and 20 bilayers of the LMR-generating coating were fabricated and characterized as refractometers. Both devices show no hysteresis and high sensitivity, improving previously reported values. This research opens very promising and exciting possibilities in the field of optical fiber sensors based on LMR, strategically including specific recognition groups to the device surface to exploit this high sensitivity for monitoring a range of target analytes. The carboxylate functional groups at the edges of the GO sheets should provide excellent attachment sites for the required coupling chemistry to realize such devices.

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Determination of the optical permittivity and thickness of absorbing films using long range modes

Cited by 117 publications

References 10 publications

High sensitive refractometers based on lossy mode resonances (LMRs) supported by ITO coated D-shaped optical fibers

High sensitive refractometers based on lossy mode resonances (LMRs) supported by ITO coated D-shaped optical fibers

Generation of Lossy Mode Resonances in Planar Waveguides Toward Development of Humidity Sensors

Lossy Mode Resonance Generation by Graphene Oxide Coatings Onto Cladding-Removed Multimode Optical Fiber

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