Raman Enhancement in Metal-Cladding Waveguide and the Influence of the Metal Film Surface Roughness

Yang, Weijia; Huang, Meizhen; Wang, Kehui; Liu, Xi; Zou, Ye; Song, Biao; Chen, Jie

doi:10.1109/jlt.2016.2571618

Cited by 2 publications

(2 citation statements)

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“…The number of guided modes increases with the waveguide thickness, and a millimeter-thickness waveguide will produce thousands of guided modes, supporting thousands of periodically distributed electric field enhancement regions, which can be applicable for sensing detection 92 and Raman enhancement. 91,[93][94][95] Uniqueness in the DMCW structures makes them different from the MCWs. First, for the relatively thick DMCW chips, the excitation of ultra-high-order modes is independent of light polarization because hundreds to thousands of resonant modes are distributed within a limited angle scanning range, making the corresponding resonant angles of TE and TM modes almost overlapping (Figure 8A,B).…”

Section: Double Metal Cladding Waveguidementioning

confidence: 99%

“…The thickness of the waveguide layer can be adjusted from a micron scale to a millimeter scale. The number of guided modes increases with the waveguide thickness, and a millimeter‐thickness waveguide will produce thousands of guided modes, supporting thousands of periodically distributed electric field enhancement regions, which can be applicable for sensing detection 92 and Raman enhancement 91,93–95 …”

Section: Wers Structure Based On Limited‐range Enhancementmentioning

confidence: 99%

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Waveguide‐based Raman enhancement strategies

Zhao,

Cao,

et al. 2023

J Raman Spectroscopy

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Waveguide‐enhanced Raman scattering (WERS) is a powerful branch of enhanced Raman technologies that has gained significant progress in recent years because of its advantages, such as reproducibility and robustness. As a complementary tool to surface‐enhanced Raman spectroscopy (SERS), WERS provides a powerful solution for reproducible quantification of analytes. According to different Raman enhancement mechanisms, five major WERS implementation strategies, namely, (1) single‐mode dielectric waveguide, (2) liquid core waveguide, (3) metal cladding waveguide, (4) resonance mirror waveguide, and (5) double metal cladding waveguide, are classified and described in detail in this review. The flexibility of WERS structures makes them easy to be integrated with 2D devices to obtain a complete on‐chip detection scheme, allowing the WERS chip to combine excitation, detection, and data analysis in integrated chips, providing a powerful prospect for real‐time and on‐site analysis of target samples. This article highlights the principles, implementations, and application scenarios of WERS techniques and evaluates their advantages and limitations, respectively. Finally, the strengths and weaknesses of WERS techniques are summarized, and promising future applications are proposed. This review provides a panoramic view for researchers interested in waveguide‐enhanced Raman technology.

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