Extraordinary Second Harmonic Generation in ReS<sub>2</sub> Atomic Crystals

Song, Yenan; Hu, Sien; Lin, Miao‐Ling; Gan, Xuetao; Tan, Ping‐Heng; Zhao, Jianlin

doi:10.1021/acsphotonics.8b00685

Cited by 61 publications

(97 citation statements)

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“…In Table S4, we summarized all the previously reported results and identified the stacking order for most samples based on available information. A third example is the SHG spectra, as reported by Song et al where SHG signals of ReS 2 can only be observed in even number layers, [ 26 ] while Dhakal et al showed that the SHG signal increases with thickness of ReS 2 starting from monolayer, regardless of the number of layers. [ 27 ] These discrepancies can be explained with ease if the factor of stacking order is considered.…”

Section: Figurementioning

confidence: 92%

“…[ 31,32 ] Similar inconsistencies also exist in the determination of indirect‐direct bandgap transition, [ 24 ] Raman vibrational modes and second harmonic generation (SHG) spectra. [ 26–30,34 ] These results suggest that some other intrinsic parameter that governs the electronic and optical properties of multilayer ReS 2 , such as stacking order, is not well understood. Even though some Raman studies indicated the existence of different stacking orders, [ 28–30 ] possible stacking order in ReS 2 has not been identified.…”

Section: Figurementioning

confidence: 99%

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Stacking‐Order‐Driven Optical Properties and Carrier Dynamics in ReS₂

et al. 2020

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textTwo distinct stacking orders in ReS2 are identified without ambiguity and their influence on vibrational, optical properties and carrier dynamics are investigated. With atomic resolution scanning transmission electron microscopy (STEM), two stacking orders are determined as AA stacking with negligible displacement across layers, and AB stacking with about a one-Received: ((will be filled in by the editorial staff)) Revised: ((will be filled in by the editorial staff)) Published online: ((will be filled in by the editorial staff))

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Section: Figurementioning

confidence: 92%

Section: Figurementioning

confidence: 99%

Stacking‐Order‐Driven Optical Properties and Carrier Dynamics in ReS₂

et al. 2020

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“…While in 1T' phase form, the trend of layer dependent SHG is opposite to that in 2H phase. In other words, even layers of 1T' crystal with inversion symmetry breaking display significant SHG while odd layers with inversion symmetry show negligible SHG [35]. Therefore, the stacking sequence of 2D materials plays a very important role in determining the preservation or breaking the inversion symmetry in atomically thin crystals and corresponding SHG intensity.…”

Section: Layered Dependent Symmetry Breaking and Preservation In Singmentioning

confidence: 99%

Second harmonic generation spectroscopy on two-dimensional materials [Invited]

Wang

Xiao

Yang

et al. 2019

Opt. Mater. Express

103

150

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The discovery of atomically thin layered materials such as graphene and transition metal dichalcogenides has unveiled the unique exploration of novel fundamental physics and device applications in two-dimensions. Characterization of their crystal symmetry and subsequent electronic properties are prominent to realize the full potential of these reduced dimensional systems, which fundamentally determine the topology, chirality and rich interfacial physics. Second harmonic generation (SHG), a nonlinear optical effect, is sensitive to crystal symmetry and electronic structures, which proves to be one of the most powerful yet simple technique to capture the essence physics. On the other hand, the 2D nature of layered materials enables large tunability in its physical properties with a number of external stimuli, which in turn paves the way for the development of 2D nonlinear optoelectronic applications. In this review, we overview recent efforts employing second harmonic generation spectroscopy and microscopy to probe lattice structures and dipole polarizations in two-dimensional transition metal dichalcogenide and polar materials. In addition, multiple external stimuli used to control SHG as potential optoelectronic devices are covered. We conclude with a perspective on the future directions of exploration on emerging 2D magnetic and topological materials based on SHG spectroscopy.

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“…The BFO‐HNPs showed excellent long‐term photostability when imaged in vivo, because of their nonlinear parametric interaction with the excitation field, implying no light absorption by the NPs. Similar approaches based on SHG generation could also be tested with other nanoprobes such as metal NPs and 2D transition metal dichalcogenides . Such a property is essential to perform tracking over days or weeks and represents a powerful tool for tracing macrophages in the entire lung as well as providing information on the fate of inhaled NPs.…”

Section: Discussionmentioning

confidence: 99%

Bismuth Ferrite Second Harmonic Nanoparticles for Pulmonary Macrophage Tracking

Ramos-Gomes

Möbius

Bonacina

et al. 2018

Small

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utilizing near-infrared NPs. [3] While optical imaging can provide functional information, its main disadvantage is the low penetration depth and high background from tissue autofluorescence. [4] More recently however, second and third harmonic generation (SHG and THG) nanomaterials have been generated that can be efficiently employed in the second near infrared window (NIR-II) [5] using a multiphoton microscope. They have several inherent advantages, i) providing a significantly higher penetration depth; ii) no bleaching or blinking; and iii) emitting both, SHG and THG signals that allow them to be detected regardless of the endogenous background signal emitted by collagen and lipids for example. [6,7] Bismuth ferrite (BiFeO 3 ) harmonic nanoparticles (BFO-HNPs) have excellent SHG and THG capabilities [8] and were recently shown to be highly biocompatible in human cell lines, [9] and can be used for monitoring of human stem cells in depth of skeletal muscle tissue at more than one millimeter from the surface. [6] BFO is the material of choice among all metal-oxides since its nonlinear coefficients is one of the highest, along with its large wavelength excitation range, reaching further into the infrared window. [8] In this work, we demonstrate the possibility of using BFO-HNPs for monitoring pulmonary macrophages. The lung Recently, second harmonic generation (SHG) nanomaterials have been generated that are efficiently employed in the classical (NIR) and extended (NIR-II) near infrared windows using a multiphoton microscope. The aim was to test bismuth ferrite harmonic nanoparticles (BFO-HNPs) for their ability to monitor pulmonary macrophages in mice. BFO-loaded MH-S macro phages are given intratracheally to healthy mice or BFO-HNPs are intranasally instilled in mice with allergic airway inflammation and lung sections of up to 100 μM are prepared. Using a two-photon-laser scanning microscope, it is shown that bright BFO-HNPs signals are detected from superficially localized cells as well as from deep within the lung tissue. BFO-HNPs are identified with an excellent signal-to-noise ratio and virtually no background signal. The SHG from the nanocrystals can be distinguished from the endogenous collagen-derived SHG around the blood vessels and bronchial structures. BFO-HNPs are primarily taken up by M2 alveolar macro phages in vivo. This SHG imaging approach provides novel information about the inter action of macrophages with cells and the extracellular matrix in lung disease as it is capable of visualizing and tracking NP-loaded cells at high resolution in thick tissues with minimal background fluorescence. Second Harmonic NanoparticlesThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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Extraordinary Second Harmonic Generation in ReS₂ Atomic Crystals

Cited by 61 publications

References 36 publications

Stacking‐Order‐Driven Optical Properties and Carrier Dynamics in ReS₂

Stacking‐Order‐Driven Optical Properties and Carrier Dynamics in ReS₂

Second harmonic generation spectroscopy on two-dimensional materials [Invited]

Bismuth Ferrite Second Harmonic Nanoparticles for Pulmonary Macrophage Tracking

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Extraordinary Second Harmonic Generation in ReS2 Atomic Crystals

Cited by 61 publications

References 36 publications

Stacking‐Order‐Driven Optical Properties and Carrier Dynamics in ReS2

Stacking‐Order‐Driven Optical Properties and Carrier Dynamics in ReS2

Second harmonic generation spectroscopy on two-dimensional materials [Invited]

Bismuth Ferrite Second Harmonic Nanoparticles for Pulmonary Macrophage Tracking

Contact Info

Product

Resources

About

Extraordinary Second Harmonic Generation in ReS₂ Atomic Crystals

Stacking‐Order‐Driven Optical Properties and Carrier Dynamics in ReS₂

Stacking‐Order‐Driven Optical Properties and Carrier Dynamics in ReS₂