The results, in addition to advancing the fundamental understanding of lattice resonances, show that periodic lattices of nanostructures are capable of enhancing coupling between sets of dipole emitters in their environment, making them a promising platform for applications. such as nanoscale energy transfer and quantum information processing.
These results constitute a robust theoretical framework that facilitates the interpretation of recent experimental results, as well as the development of new applications that exploit the exceptional optical properties of periodic arrays of nanoparticles.

Resonance

In physics, resonance describes the phenomenon of amplitude increase that occurs when the frequency of a periodic stimulus (such as the frequency of light) is equal to or close to a natural frequency of the system on which it acts. When the oscillation is applied at a resonant frequency, the system oscillates at a higher amplitude than when the same force is applied at another non-resonant frequency.

Network resonances

Lattice resonances are collective modes of surface plasmons supported by periodic arrays of metallic nanostructures. These lattice resonances originate from coherent multiple scattering between the components of the array.
The wavelength associated with the resonance depends on the periodicity of the matrix and, due to their collective nature, they produce optical responses that are both very strong and spectrally narrow, leading to record quality factors for metallic systems. Thanks to these exceptional properties, periodic arrays of metallic nanostructures are being used in a wide range of applications, such as the implementation of ultrasensitive optical sensors, the development of platforms to explore new physical phenomena, as well as the design of different optical elements, such as light-emitting devices, lenses, color filters, and nonlinear elements.