Related Experiment Video
Updated: Jun 14, 2025
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
6.8K
Modulating molecular plasmons in naphthalene via intermolecular interactions and strong light-matter coupling
1Department of Chemistry and Biochemistry, University of California Santa Cruz, Santa Cruz, CA 95064, USA. zliu373@ucsc.edu.
Physical Chemistry Chemical Physics : PCCP
|September 3, 2024
Summary
We explored how molecular plasmons in naphthalene can be controlled by changing how molecules interact and by coupling them with light. This research offers insights into tuning plasmonic responses for potential applications.
Area of Science:
- Theoretical chemistry
- Quantum electrodynamics
- Plasmonics
Background:
- Naphthalene exhibits plasmon-like resonances, termed molecular plasmons.
- Understanding and controlling these molecular plasmons is crucial for advanced optical applications.
Purpose of the Study:
- To theoretically investigate the modulation of molecular plasmons in naphthalene.
- To explore the influence of intermolecular interactions and light-matter coupling on plasmonic responses.
Main Methods:
- Utilized the configuration interaction with single excitations (CIS) approach.
- Employed a quantum electrodynamics extension (QED-CIS-1) to model molecular plasmon states.
- Analyzed naphthalene dimers with varying intermolecular distances and naphthalene in optical cavities.
Main Results:
- Observed significant shifts in plasmon peak absorption spectra of naphthalene.
- Demonstrated that spatial configuration of dimers and cavity parameters (polarization, frequency, coupling strength) precisely control plasmonic responses.
- Identified a synergistic effect on the plasmon peak when intermolecular interactions and cavity effects are combined.
Conclusions:
- Intermolecular interactions and strong light-matter coupling effectively modulate molecular plasmons in naphthalene.
- This study provides fundamental insights into the plasmonic behavior of polyacenes.
- Opens avenues for plasmon modulation in more complex molecular systems.
More Related Videos
Related Concept Videos
01:27¹H NMR: Long-Range Coupling
1.7K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
1.7K
01:14π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds
1.2K
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
1.2K
01:26Variables Affecting Phosphorescence and Fluorescence
493
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
493
01:14Molecular Spectroscopy: Absorption and Emission
1.9K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
1.9K
01:23Photoluminescence: Fluorescence and Phosphorescence
1.7K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
1.7K
01:27π Electron Effects on Chemical Shift: Overview
1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K