Chalcogenide waveguide structures as substrates and guiding layers for evanescent wave Raman spectroscopy of bacteriorhodopsin

Pope, April; Schulte, Alfons; Guo, Yu; Ono, Luis K.; Cuenya, Beatriz Roldán; Lopez, Cédric; Richardson, Kathleen; Kitanovski, Karlo; Winningham, Thomas A.

doi:10.1016/j.vibspec.2006.05.006

Cited by 12 publications

(10 citation statements)

References 14 publications

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“…Different photonic structures i.e. optical fibers [5,6], planar waveguides [7], strip waveguides [8][9][10][11][12] and more recently slot waveguides [13] have been successfully used for this purpose. HIC waveguides of few millimeters length also provide the ease of use where an analyte can simply be drop casted.…”

Section: Introductionmentioning

confidence: 99%

High index contrast photonic platforms for on-chip Raman spectroscopy

Raza¹,

Clemmen²,

Wuytens³

et al. 2019

Opt. Express

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Nanophotonic waveguide enhanced Raman spectroscopy (NWERS) is a sensing technique that uses a highly confined waveguide mode to excite and collect the Raman scattered signal from molecules in close vicinity of the waveguide. The most important parameters defining the figure of merit of an NWERS sensor include its ability to collect the Raman signal from an analyte i.e. "the Raman conversion efficiency" and the amount of "Raman background" generated from the guiding material. Here, we compare different photonic integrated circuit (PIC) platforms capable of on-chip Raman sensing in terms of the aforementioned parameters. Among the four photonic platforms under study, tantalum oxide and silicon nitride waveguides exhibit high signal collection efficiency and low Raman background. In contrast, the performance of titania and alumina waveguides suffers from a strong Raman background and a weak signal collection efficiency respectively.

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Section: Introductionmentioning

confidence: 99%

High index contrast photonic platforms for on-chip Raman spectroscopy

Raza¹,

Clemmen²,

Wuytens³

et al. 2019

Opt. Express

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show abstract

“…This is due to the chemical stability, biocompatibility, and low fluorescence of TiO 2 , which make it a suitable platform for sensing a wide range of chemical and biological agents. 79 Pope et al 93 have used chalcogenide glass films of As 2 S 3 on SiO 2 substrates for WERS and show the waveguide Raman emission (background) spectrum to be limited to below 500 cm −1 . The refractive index of this material at 785 nm is ∼2.45, offering potential for high Raman conversion efficiency due to high index contrast, but experimental differences make direct comparisons difficult.…”

Section: ■ Wers Design Considerationsmentioning

confidence: 99%

Waveguide Enhanced Raman Spectroscopy for Biosensing: A Review

et al. 2021

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Waveguide enhanced Raman spectroscopy (WERS) utilizes simple, robust, high-index contrast dielectric waveguides to generate a strong evanescent field, through which laser light interacts with analytes residing on the surface of the waveguide. It offers a powerful tool for the direct identification and reproducible quantification of biochemical species and an alternative to surface enhanced Raman spectroscopy (SERS) without reliance on fragile noble metal nanostructures. The advent of low-cost laser diodes, compact spectrometers, and recent progress in material engineering, nanofabrication techniques, and software modeling tools have made realizing portable and cheap WERS Raman systems with high sensitivity a realistic possibility. This review highlights the latest progress in WERS technology and summarizes recent demonstrations and applications. Following an introduction to the fundamentals of WERS, the theoretical framework that underpins the WERS principles is presented. The main WERS design considerations are then discussed, and a review of the available approaches for the modification of waveguide surfaces for the attachment of different biorecognition elements is provided. The review concludes by discussing and contrasting the performance of recent WERS implementations, thereby providing a future roadmap of WERS technology where the key opportunities and challenges are highlighted.

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“…4. As 3d та Se 3d спектри аморфних плівок As, Se, As2Se3 та фотолегованої Ag плівки As2Se3 [16] Протягом останніх тридцяти років методом рентгенівської фотоелектронної спектроскопії досліджені двохкомпонентні халькогенідні стекла систем As-S [18,[20][21][22][23][24][25], As-Se [26][27][28][29][30][31][32], Ge-S [33], Ge-Se [34][35] Рис. 8.…”

Section: особливості методів фотоелектронної спектроскопіїunclassified

Application of photoelectron spectroscopy methods for investigation of subsurface layers of amorphous chalcogenide materials

Попович¹

2015

Sci.Herald.Uzh.Univ.Ser.Phys

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Chalcogenide waveguide structures as substrates and guiding layers for evanescent wave Raman spectroscopy of bacteriorhodopsin

Cited by 12 publications

References 14 publications

High index contrast photonic platforms for on-chip Raman spectroscopy

High index contrast photonic platforms for on-chip Raman spectroscopy

Waveguide Enhanced Raman Spectroscopy for Biosensing: A Review

Application of photoelectron spectroscopy methods for investigation of subsurface layers of amorphous chalcogenide materials

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