Accurately Predicting the Radiation Enhancement Factor in Plasmonic Optical Antenna Emitters

Zhang, Mao-Xin; You, En‐Ming; Zheng, Peng; Ding, Song‐Yuan; Zhang, Tian; Moskovits, Martin

doi:10.1021/acs.jpclett.0c00304

Cited by 7 publications

(6 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhang et al. theoretically studied the enhancement factors in a particle dimer and obtained the similar conclusion …”

Section: Introductionmentioning

confidence: 59%

“…Zhang et al theoretically studied the enhancement factors in a particle dimer and obtained the similar conclusion. 13 The mechanism for the surface-enhanced/quenched fluorescence, 14−17 on the other hand, is more complex than that for the surface-enhanced Raman scattering. Scientists believe that the complication is mainly due to the larger quantum yield of the fluorophore in comparison to that of Raman scattering.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Radiative Decay Rate Enhancement and Quenching for Multiple Emitters near a Metal Nanoparticle Surface

Zhou

Zou

2021

J. Phys. Chem. C

View full text Add to dashboard Cite

When molecules (emitters) are placed near a metal surface, their Raman scattering will be significantly enhanced, and their fluorescence signal might be enhanced or quenched. Both these two phenomena are closely related to the enhancement of the radiative decay rate (RDR) of the molecules upon the presence of a nearby metal nanoparticle. Using a recently developed model, we found that the RDR enhancement or quenching for two or more emitters placed near a spherical Ag nanoparticle surface is drastically different from that when only one emitter is included. When three emitters are arranged near the metal surface, the overall enhancement factor can be even much smaller than the lowest enhancement factor of one emitter. If six emitters are evenly arranged near the metal surface, the enhancement factors at different wavelengths exhibit an asymmetric line shape near the resonance wavelength of the metal nanoparticle and the line shape will converge when the number of emitters is increased further. When emitters are placed at different distances from the nanoparticle surface, the coupling between one emitter and the metal nanoparticle along the dipole axis exhibits a near-field characteristic, while the enhancement factor of the RDR for six emitters arranged evenly around a metal nanoparticle follows a far-field trend. The discoveries will advance our fundamental understanding of the enhancement and quenching mechanism of emitters near metal nanoparticle surfaces, especially for those with a high quantum yield which allows more than one of them to radiate simultaneously near one metal nanoparticle surface.

show abstract

“…Zhang et al. theoretically studied the enhancement factors in a particle dimer and obtained the similar conclusion …”

Section: Introductionmentioning

confidence: 59%

Section: ■ Introductionmentioning

confidence: 99%

Radiative Decay Rate Enhancement and Quenching for Multiple Emitters near a Metal Nanoparticle Surface

Zhou

Zou

2021

J. Phys. Chem. C

View full text Add to dashboard Cite

show abstract

“…Applications abound for the activation, manipulation, and magnification of molecular fluorescence, such as bioimaging, clinical diagnostics, sensing, information security, patterning, optoelectronics, catalysis, and single molecule tracking. − Merging modern physical organic chemistry with nanomaterials science is pushing boundaries in many of these areas, where fusion between the study of fundamental photophysical processes and nanoparticle–molecular interactions is rapidly expanding the scientific body of knowledge, producing remarkable developments on an almost daily basis. − Optimization of these advances, tailored to the requirements of different applications, rests upon the ability to elucidate the underlying mechanisms involved.…”

Section: Introductionmentioning

confidence: 99%

“…50 While recent research efforts have concentrated on predicting enhancement factors, MEF-induced spectral distortions, and the impact of far-field irradiance, very little attention has been paid to investigating the balance between the two MEF mechanisms. [23][24][25]32 Distinguishing between the two MEF mechanisms at the bench scale is prohibited by the need to measure the modified molecular extinction coefficient and quantum yield of fluorescence in the presence of NP. 45 This is difficult to do reliably because AgNP enhance the excitation light and also because molecular absorption may overlap with NP extinction.…”

Section: ■ Introductionmentioning

confidence: 99%

Single Molecule Techniques Can Distinguish the Photophysical Processes Governing Metal-Enhanced Fluorescence

2020

View full text Add to dashboard Cite

Plasmonic metal nanoparticles can impact the behavior of organic molecules in a number of ways, including enhancing or quenching fluorescence. Only through a comprehensive understanding of the fundamental photophysical processes regulating nanomolecular interactions can these effects be controlled and exploited to the fullest extent possible. Metal-enhanced fluorescence (MEF) is governed by two underlying processes, increased rate of fluorophore excitation, and increased fluorophore emission, the balance between which has implications for optimizing hybrid nanoparticle–molecular systems for various applications. We report groundbreaking work on the use of single molecule fluorescence microscopy to distinguish between the two mechanistic components of MEF, in a model system consisting of two analogous boron dipyrromethene (BODIPY) fluorophores and triangular silver nanoparticles (AgNP). We demonstrate that the increased excitation MEF mechanism occurs to approximately the same extent for both dyes, but that the BODIPY with the higher quantum yield of fluorescence experiences a greater degree of MEF via the increased fluorophore emission mechanism and higher overall enhancement, as a result of its superior ability to undergo near-field interactions with AgNP. We foresee that this knowledge and methodology will be used to tailor MEF to meet the needs of different applications, such as those requiring maximum enhancement of fluorescence intensity or instead prioritizing excited-state photochemistry.

show abstract

“…As is well-known, the total EF should be calculated by the product of the local field EF and radiation EF. [17,[69][70][71] Here, the commonly used fourth-power approximation fails to exactly predict the total EFs for ATRc-SHINERS because the incident and scattered wavelengths are different, and more importantly, the incident angle is different from the main radiation angles of the Raman scattered light in the ATR-Raman and ATRc-SHINERS configurations as shown in Figure 3. For the Au substrate, the total averaged enhancement for ATR-Raman <G ATR-Raman >, SHINERS under oblique illumination <G SHINERS (45 )>, SHINERS under normal illumination <G SHINERS (90 )>, and ATRc-SHINERS <G ATRc-SHINERS > is 88.4, 1.9 × 10 5 , 3.6 × 10 4 , and 1.0 × 10 7 .…”

Section: Atrc-shiners For Cascading Radiation Enhancementmentioning

confidence: 99%

Attenuated total reflection‐cascading nanostructure‐enhanced Raman spectroscopy on flat surfaces: A nano‐optical design

You

Wang

Zheng

et al. 2020

J Raman Spectroscopy

Self Cite

View full text Add to dashboard Cite

The surface‐enhanced Raman scattering (SERS) effect was discovered by Richard Van Duyne et al. in 1977. He and coworkers also first utilized an innovative strategy that used SERS to record spectra on such SERS‐inactive substrate surfaces as n‐gallium arsenide (100) surfaces, which were modified by silver nano‐islands. This nanostructure‐enhanced Raman spectroscopy on flat surfaces (NERSoFS) enabled such SERS applications to be expanded to a variety of materials by virtue of SERS‐active nanostructures such as Au or Ag nanoparticles and shell‐isolated nanoparticles. However, most of such systems, although yielding Raman spectra, produce rather low enhancements, especially when used to record spectra on flat surfaces of SERS‐inactive materials. In this work, along with the direction of Van Duyne's borrowing‐SERS strategy and on the basis of the strategy of cascading optical coupling, we consider a theoretically designed optical configuration, based on an attenuated total reflection‐cascading nanostructure to produce enhanced Raman spectroscopy (ATRc‐NERS) on flat surfaces. This system can effectively harvest the incident light, thereby boosting the local optical field of the incident light and also moderately increasing the radiation field of the Raman‐scattered signals. In this way, one can gain 1–2 additional orders of magnitude in Raman enhancement over present NERSoFS systems both on metallic and nonmetallic flat surfaces, which are otherwise SERS‐inactive. This ATRc‐NERS strategy can potentially be used to develop ultrasensitive and versatile tools for surface science, material science, catalysis, electrochemistry, and micro‐electronics and micro‐LED industries.

show abstract

Accurately Predicting the Radiation Enhancement Factor in Plasmonic Optical Antenna Emitters

Cited by 7 publications

References 49 publications

Radiative Decay Rate Enhancement and Quenching for Multiple Emitters near a Metal Nanoparticle Surface

Radiative Decay Rate Enhancement and Quenching for Multiple Emitters near a Metal Nanoparticle Surface

Single Molecule Techniques Can Distinguish the Photophysical Processes Governing Metal-Enhanced Fluorescence

Attenuated total reflection‐cascading nanostructure‐enhanced Raman spectroscopy on flat surfaces: A nano‐optical design

Contact Info

Product

Resources

About