Plasmon-induced transparency in coupled triangle-rod arrays

This paper investigates plasmon-induced transparency (PIT) in coupled triangle-rod nanostructure arrays. By engineering the coupling between bright and dark plasmonic modes in the array geometry, a sharp transparency window is achieved in the absorption spectrum, with potential applications in slow-light devices and plasmonic sensors.

Problem setting

This paper investigates plasmon-induced transparency (PIT) in coupled triangle-rod nanostructure arrays. By engineering the coupling between bright and dark plasmonic modes in the array geometry, a sharp transparency window is achieved in the absorption spectrum, with potential applications in slow-light devices and plasmonic sensors.

The figures below show the nanostructure layout, spectral response, and simulated field behavior used to analyze the plasmon-induced transparency effect.

Method and visual evidence

The work studies how a bright plasmonic mode in the rod couples with a darker resonant mode in the triangle-rod array. That coupling produces a narrow transparency window in the absorption spectrum, which is the optical signature targeted for sensing and slow-light applications.

Method overview.

Representation and setup.

Experimental evidence.

Results and impact

The reported measurements and FDTD simulations support the PIT interpretation by comparing the array geometry, resonance spectra, and near-field distributions. The page is kept concise because this is earlier adjacent optics work rather than the main industrial 3D vision line.