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Petrov R, Loumaigne M, Barillé R, Frère P. Refined RGB Strategy for the Synthesis of Polymer‐Based Full Organic Luminescent Nanotubes with Broad Emission Bands. CHEMPHOTOCHEM 2020. [DOI: 10.1002/cptc.202000150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ravil Petrov
- MOLTECH-Anjou Université d'Angers/UMR CNRS 6200 2 Boulevard Lavoisier 49045 Angers France
| | - Matthieu Loumaigne
- MOLTECH-Anjou Université d'Angers/UMR CNRS 6200 2 Boulevard Lavoisier 49045 Angers France
| | - Régis Barillé
- MOLTECH-Anjou Université d'Angers/UMR CNRS 6200 2 Boulevard Lavoisier 49045 Angers France
| | - Pierre Frère
- MOLTECH-Anjou Université d'Angers/UMR CNRS 6200 2 Boulevard Lavoisier 49045 Angers France
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Zhang L, Sun J, Li Z, Yuan Y, Liu A, Huang Y. Coherent Enhancement of Dual-Path-Excited Remote SERS. ACS APPLIED MATERIALS & INTERFACES 2020; 12:32746-32751. [PMID: 32589011 DOI: 10.1021/acsami.0c07939] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Combining both localized surface plasmon polaritons (LSPPs) and propagating surface plasmon polaritons, remote surface-enhanced Raman scattering (SERS) emerges as a novel sensing technology in recent years, which could avoid the overlap of incident light and inelastic scattering light in SERS. Compared to traditional SERS, it has novel applications in sensors, plasmon-driven surface-catalyzed reactions, Raman optical activity, etc. However, the weak Raman intensity of remote SERS impedes its further application. In this work, we demonstrated that the remote SERS signals could be enhanced by more than 100% through the subwavelength interference in dual-path-excited Ag-branched nanowire dimer and nanowire-nanoparticle systems. Our experiment has revealed that remote SERS intensities could be modulated by polarization and phase differences of two incident lights illuminating at two separate nanowire terminals. The simulated electromagnetic field distributions through the finite-difference time-domain (FDTD) method indicate that subwavelength interference occurs in Ag nanowires, which causes the Raman intensities collected at a remote site is greatly influenced by the coherent superposition of propagating surface plasmon polaritons (PSPPs). Our work on this coherent enhancement could not only promote the application of remote SERS but also enlarge the research on light manipulating in the subwavelength.
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Affiliation(s)
- Lingjun Zhang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing 400044, China
| | - Jianfeng Sun
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing 400044, China
| | - Zhuohao Li
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing 400044, China
| | - Yuan Yuan
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing 400044, China
| | - Anping Liu
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing 400044, China
- Chongqing University Industrial Technology Research Institute, Chongqing 400044, China
| | - Yingzhou Huang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
- Chongqing Key Laboratory of Soft Condensed Matter Physics and Smart Materials, College of Physics, Chongqing University, Chongqing 400044, China
- Chongqing University Industrial Technology Research Institute, Chongqing 400044, China
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Winterauer DJ, Funes-Hernando D, Duvail JL, Moussaoui S, Batten T, Humbert B. Nanoscale Spatial Resolution in Far-Field Raman Imaging Using Hyperspectral Unmixing in Combination with Positivity Constrained Super-Resolution. APPLIED SPECTROSCOPY 2020; 74:780-790. [PMID: 32452210 DOI: 10.1177/0003702820920688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This work introduces hyper-resolution (HyRes), a numerical approach for spatial resolution enhancement that combines hyperspectral unmixing and super-resolution image restoration (SRIR). HyRes yields a substantial increase in spatial resolution of Raman spectroscopy while simultaneously preserving the undistorted spectral information. The resolving power of this technique is demonstrated on Raman spectroscopic data from a polymer nanowire sample. Here, we demonstrate an achieved resolution of better than 14 nm, a more than eightfold improvement on single-channel image-based SRIR and 25× better than regular far-field Raman spectroscopy, and comparable to near-field probing techniques.
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Affiliation(s)
- Dominik J Winterauer
- Renishaw plc, Wotton-under-Edge, UK
- Institut des Matériaux Jean Rouxel Nantes (IMN), Nantes, France
| | | | - Jean-Luc Duvail
- Institut des Matériaux Jean Rouxel Nantes (IMN), Nantes, France
| | - Saïd Moussaoui
- Laboratoire des Sciences du Numérique de Nantes (LS2N), Nantes, France
| | | | - Bernard Humbert
- Institut des Matériaux Jean Rouxel Nantes (IMN), Nantes, France
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Raha S, Mitra S, Kumar Mondal P, Biswas S, D Holmes J, Singha A. Probing dipole and quadrupole resonance mode in non-plasmonic nanowire using Raman spectroscopy. NANOTECHNOLOGY 2020; 31:425201. [PMID: 32541104 DOI: 10.1088/1361-6528/ab9cf9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Electric field enhancement in semiconductor nanostructures offers a possibility to find an alternative to the metallic particles which is well known for tuning the light-matter interaction due to its strong polarizability and size-dependent surface plasmon resonance energy. Raman spectroscopy is a powerful technique to monitor the electric field as its scattering depends on the electromagnetic eigenmode of the particle. Here, we observe enhanced polarized Raman scattering from germanium nanowires of different diameters. The incident electromagnetic radiation creates a distribution of the internal electric field inside the naowires which can be enhanced by manipulating the nanowire diameter, the incident electric field and its polarization. Our estimation of the enhancement factor, including its dependence on nanowire diameter, agrees well with the Mie theory for an infinite cylinder. Furthermore, depending on diameter of nanowire and wavelength of incident radiation, polarized Raman study shows dipolar (antenna effect) and quadrupolar resonances, which has never been observed in germanium nanowire. We attempt to understand this polarized Raman behavior using COMSOL Multiphysics simulation, which suggests that the pattern observed is due to photon confinement within the nanowires. Thus, the light scattering direction can be toggled by tuning the polarization of incident excitation and diameter of non plasmonic nanowire.
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Affiliation(s)
- Sreyan Raha
- Department of Physics, Bose Institute, 93/1 Acharya Prafulla Chandra road, Kolkata 700009, India
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Winterauer DJ, Funes-Hernando D, Duvail JL, Moussaoui S, Batten T, Humbert B. Sub-Micron Spatial Resolution in Far-Field Raman Imaging Using Positivity-Constrained Super-Resolution. APPLIED SPECTROSCOPY 2019; 73:902-909. [PMID: 30916988 DOI: 10.1177/0003702819832355] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Raman microscopy is a valuable tool for detecting physical and chemical properties of a sample material. When probing nanomaterials or nanocomposites the spatial resolution of Raman microscopy is not always adequate as it is limited by the optical diffraction limit. Numerical post-processing with super-resolution algorithms provides a means to enhance resolution and can be straightforwardly applied. The aim of this work is to present interior point least squares (IPLS) as a powerful tool for super-resolution in Raman imaging through constrained optimization. IPLS's potential for super-resolution is illustrated on numerically generated test images. Its resolving power is demonstrated on Raman spectroscopic data of a polymer nanowire sample. Comparison to atomic force microscopy data of the same sample substantiates that the presented method is a promising technique for analyzing nanomaterial samples.
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Affiliation(s)
- Dominik J Winterauer
- 1 Renishaw plc, Wotton-under-Edge, UK
- 2 Institut des Matériaux Jean Rouxel (IMN), UMR 6502 CNRS - Université de Nantes, Nantes, France
| | - Daniel Funes-Hernando
- 2 Institut des Matériaux Jean Rouxel (IMN), UMR 6502 CNRS - Université de Nantes, Nantes, France
| | - Jean-Luc Duvail
- 2 Institut des Matériaux Jean Rouxel (IMN), UMR 6502 CNRS - Université de Nantes, Nantes, France
| | - Saïd Moussaoui
- 3 Laboratoire des Sciences du Numérique de Nantes (LS2N), UMR 6502 CNRS - Université de Nantes, Nantes, France
| | | | - Bernard Humbert
- 2 Institut des Matériaux Jean Rouxel (IMN), UMR 6502 CNRS - Université de Nantes, Nantes, France
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