Polarization-dependent strong coupling between silver nanorods and photochromic molecules.

Area of Science:

• Plasmonics
• Molecular Photonics
• Nanomaterials

Background:

• Active plasmonics is crucial for developing sophisticated plasmonic devices.
• Localized surface plasmon resonance (LSPR) in metallic nanostructures is a key phenomenon.
• Photochromic molecules undergo reversible structural changes upon light irradiation.

Purpose of the Study:

• To demonstrate polarization-dependent strong coupling between LSPR in silver nanorods and photochromic molecules.
• To investigate the influence of nanorod geometry on plasmon-molecule interactions.
• To achieve controlled light-matter interactions for advanced optical applications.

Main Methods:

• Fabrication of silver nanorods with independently controlled width and length.
• Selective excitation of LSPR along the short and long axes of the nanorods.
• Spectroscopic analysis to observe strong coupling and Rabi splitting.

Main Results:

• Demonstrated polarization-dependent strong coupling between silver nanorod plasmons and photochromic molecules.
• Observed a clear Rabi splitting in the dispersion curves when varying nanorod dimensions.
• Confirmed the tunability of the plasmonic resonance through nanorod geometry.

Conclusions:

• The study highlights the potential of active plasmonics for tailored light-matter interactions.
• Geometric control of silver nanorods allows for precise manipulation of plasmon-molecule coupling.
• This work paves the way for novel optoelectronic devices and sensing applications.