Strong circular dichroism enhancement by plasmonic coupling between graphene and h-shaped chiral nanostructure

Wang, Yongkai; Dong, Jun; Wang, Zhongyu; Zhou, Shangqi; Wang, Qijing; Han, Qingyan; Gao, Wei; Ren, Kaili; Qi, Jianxia

doi:10.1364/oe.27.033869

Cited by 16 publications

(8 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The absorption spectra of LCP light and RCP light are represented by A – and A + , respectively. CD is defined as CD = A + – A – . Two perfectly matched layers are set on the top and bottom of the model to simulate infinite space.…”

Section: Design Principles and Simulation Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Circular Dichroism Enhancement and Biosensing Application of Composite Dielectric Chiral Nanostructures

Wang

et al. 2021

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

Chiral nanostructures with strong circular dichroism (CD) have been widely used in molecular detection, chemical analysis, and biosensing. However, how to enhance and dynamically adjust the CD signal of the chiral nanostructures is still a current challenge. Here, monolayer molybdic sulfide (MoS2) is introduced into the composite dielectric chiral nanostructures (CDCNs) composed of silicon–vanadium dioxide Z-shaped nanorods placed on the silica–silver substrate to enhance and dynamically adjust the CD signal. Results demonstrate that the coupling between CDCNs and MoS2 results in different absorption enhancing under different circularly polarized lights and strong CD effects. The surface electric field distribution of CDCNs/MoS2 reveals that the three CD signals are mainly due to the surface plasmon polariton on the surface of the silver and the guided mode resonance in silica along the x or y directions, respectively. The CD signals can be actively adjusted through the insulator–metal transition of vanadium dioxide. In addition, the coupling characteristics between different chiral molecules and CDCNs/MoS2 can be applied in the identification of chiral molecules. These results provide a new method for enhancing and dynamically adjusting CD signals and will promote the sensing of chiral molecules.

show abstract

Section: Design Principles and Simulation Methodsmentioning

confidence: 99%

“…CD is defined as CD = A + − A − . 58 Two perfectly matched layers are set on the top and bottom of the model to simulate infinite space.…”

Section: Design Principles and Simulation Methodsmentioning

confidence: 99%

Circular Dichroism Enhancement and Biosensing Application of Composite Dielectric Chiral Nanostructures

Wang

et al. 2021

J. Phys. Chem. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…The CD signal can be modulated by changing the oblique incident angle. Compared with bilayer chiral nanostructures, multilayer chiral nanostructures can generate stronger CD signals. − For example, the h-type structure of multilayer chiral nanostructures and the nearly perfect extinction chiral metamaterial mirror surface produce a CD signal with an FWHM of 300 nm and an intensity of 0.689 in the visible range . In addition, achiral nanostructures can also generate similar CD signals.…”

Section: Introductionmentioning

confidence: 99%

“…17−20 For example, the h-type structure of multilayer chiral nanostructures and the nearly perfect extinction chiral metamaterial mirror surface produce a CD signal with an FWHM of 300 nm and an intensity of 0.689 in the visible range. 19 In addition, achiral nanostructures can also generate similar CD signals. One method is placing achiral nanostructures in chiral media.…”

Section: Introductionmentioning

confidence: 99%

Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS₂ and a Distributed Bragg Reflector

Wang

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Narrowband circular dichroism (CD) has aroused wide concerns in high-sensitivity detections of chiral molecular and chiral catalysis. Nevertheless, the dynamical adjustment of ultranarrowband (UNB) CD signals is hard to achieve. In this work, single-layer molybdenum disulfide (MoS 2 ), vanadium dioxide (VO 2 ), and a distributed Bragg reflector (DBR) are introduced into X-shaped chiral nanostructures (XCNs) for overcoming the above challenge. The simulation results show that XCNs can generate four strong UNB CD signals in the near-infrared band, and XCNs/MoS 2 can further enhance the UNB CD signals. The full width at half-minimum of UNB CD signals can reach 0.14 nm. The electric field distributions of XCNs/MoS 2 show that the four CD signals originate from the coupling between the guided mode resonances along the x and y axes in the VO 2 layer and the Tamm plasmon polaritons along the x and y axes in the DBR layer. Four UNB CD peaks can be actively tuned by varying the structural parameters, the number of MoS 2 layers, and the environmental temperature. The FOM of XCNs/MoS 2 can reach 1487 by changing the refractive index of the DRB layers. These findings contribute to the design of UNB chiral devices and provide new possibilities for environmental monitoring and ultrasensitive detection of chiral molecules.

show abstract

“…Bragg reflective metamaterials have been extensively developed for CPL detection beyond >1000 nm 11 and towards mid-infrared, mainly used for satellite communications. 12 Similar working principles apply to the liquid crystal layer functionalized devices, where the CPL detection relies on the selective reflection instead of intrinsic chiroptical response [i.e., circular dichroism (CD)]. For cost-effective and miniaturized devices for CPL detection, an increasing number of intrinsically chiral organic and hybrid materials have been investigated.…”

mentioning

confidence: 99%

Access to sensitive near infrared circularly polarized light detection via non-fullerene acceptor blends

Wan

Zhang

Cho

et al. 2022

Preprint

View full text Add to dashboard Cite

Circularly polarized light (CPL), as a light source, offers greater light persistence than both non-polarized light and linearly polarized light, and is widely used for high-contrast sensing technologies. An everlasting challenge in realizing full-spectrum CPL detection when using chiral organic semiconductors is to achieve strong chiroptical activities in the near infrared (NIR) region. The conventional approaches to reducing the band gap of organic semiconductors are based on co-planar backbones and lead to molecular symmetries incompatible with the presence of chirality; thus, the strategies to design chiral molecules rely on twisted stereogenic moieties. Here, instead of a de novo design of chiral molecular structures, we introduce a widely applicable strategy to directly induce chiroptical activity in planar non-fullerene acceptors (NFAs), which have been largely developed in the framework of organic photovoltaics and provide a wealth of opportunities to fill the spectral gap of CPL detection in the NIR. We demonstrate proof-of-concept circularly polarized organic photodiodes (CP-OPDs) using chiroptically active NFA blends, which exhibit strong circular dichroism (CD) and hence great sensitivity to CPL in the NIR region. Importantly, this strategy is found to be effective in a wide series of state-of-the-art NFA families, i.e., ITIC, o-IDTBR, and Y6 analogs, which significantly broadens the range of materials applicable to NIR CPL detection and can inspire further designs of strongly CPL-active systems for chiropto-electronics.

show abstract

Strong circular dichroism enhancement by plasmonic coupling between graphene and h-shaped chiral nanostructure

Cited by 16 publications

References 38 publications

Circular Dichroism Enhancement and Biosensing Application of Composite Dielectric Chiral Nanostructures

Circular Dichroism Enhancement and Biosensing Application of Composite Dielectric Chiral Nanostructures

Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS₂ and a Distributed Bragg Reflector

Access to sensitive near infrared circularly polarized light detection via non-fullerene acceptor blends

Contact Info

Product

Resources

About

Strong circular dichroism enhancement by plasmonic coupling between graphene and h-shaped chiral nanostructure

Cited by 16 publications

References 38 publications

Circular Dichroism Enhancement and Biosensing Application of Composite Dielectric Chiral Nanostructures

Circular Dichroism Enhancement and Biosensing Application of Composite Dielectric Chiral Nanostructures

Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS2 and a Distributed Bragg Reflector

Access to sensitive near infrared circularly polarized light detection via non-fullerene acceptor blends

Contact Info

Product

Resources

About

Enhancement and Sensing Application of Ultra-Narrowband Circular Dichroism in the Chiral Nanostructures Based on Monolayer MoS₂ and a Distributed Bragg Reflector