Direct immunosensing with an integrated-optical output grating coupler

Clerc, D.; Lukosz, W.

doi:10.1016/s0925-4005(97)80199-2

Cited by 40 publications

(35 citation statements)

References 9 publications

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“…The way to correct the drift of effective refractive indexes in the system of output grating coupler has been presented in Ref. 45. In some cases as, e.g., in gas chemical sensors, the drift affected by the change of the refractive index of wave− guide film can be controlled by the application of a refer− ence path.…”

Section: Discussionmentioning

confidence: 99%

“…The resolution is limited by temperature fluctuations. In practice, it is possible to ensure temperature stabilization at the level of 0.1-0.2 K [20,44,45], which means that the detection limit involving the measurement of refractive index changes is limited to the level of (Dn c ) miñ 10 -5 RIU. Hence, we can observe that the sensitivities of sensor structures presented in the work are sufficient for the measurements of refractive indexes of water solutions and can be applied in biochemical measurements.…”

Section: Discussionmentioning

confidence: 99%

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Embossable grating couplers for planar evanescent wave sensors

Karasiński

2011

Opto-Electronics Review

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The paper presents input grating couplers to be applied in planar evanescent wave sensors. Waveguide films SiO2:TiO2 were obtained using the sol-gel method, and grating couplers with a groove density of 1000 g/mm and 2400 g/mm were produced using the method of master grating embossing in sol film. The influence of refractive index of the cover on incoupling angles was presented. Basing on the experimental results, detection limits involving the changes of effective indexes and refractive indexes of the cover for the investigated planar structures were determined. Sensor structures with the couplers having a groove density of 1000 g/mm enable to detect minimum changes of the effective index below 3.3×10−7 and to detect minimum changes of refractive index of the cover below 2.3×10−6. Detection limits for the structures with couplers having the groove density of 2400 g/mm are over twofold higher.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Embossable grating couplers for planar evanescent wave sensors

Karasiński

2011

Opto-Electronics Review

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“…Photonic structures serving as an output systems may also be applied in sensor systems [20]. Sensor structures with grating couplers may be used in gas sensors for detecting changes of the refractive index in the sur− rounding medium, basing on measure of changes of the der− ivation angle Q of the electromagnetic wave from the optic waveguide [21].…”

Section: Input-output Systems Based On Hybrid Structuresmentioning

confidence: 99%

Hybrid photonics structures with grating and prism couplers based on ZnO waveguides

Struk

Pustelny

Gołaszewska

et al. 2013

Opto-Electronics Review

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This paper presents the results of investigations concerning input-output systems of an electromagnetic wave in the visible and near visible spectrum for their application in structures of integrated optics. The input-output structures used in described planar optical waveguides are in a form of prism and grating couplers. The first part of the paper contains numerical analysis of grating couplers aiming at an optimization of their geometrical parameters, strictly — the depth of the grooves in the grating coupler. The second part presents the practical realization, as well as experimental tests of the planar optical waveguide with the hybrid input-output system. As the input system of the electromagnetic wave, a prism coupler was used, and in the case of the output system — a photonic structure with grating coupler was applied. The investigated planar wave guides with the input-output structures were made of a wide energy band gap semiconductor — zinc oxide (ZnO).

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“…Applications of grating couplers in biological and chemical sensing are well known Lukosz et al, 1991;Nellen and Lukosz, 1993;Brandenberg and Gombert, 1993;Clerc and Lukosz, 1997. High sensitivity and real time data analysis Brecht and Gauglitz, 1998 provide the great interest in this type of sensors nowadays.…”

Section: Introductionmentioning

confidence: 99%