![]() The collective oscillations of free charge carriers produce oscillating electrical current. Localized surface plasmon resonance, which refers to the collective oscillations of free charge carriers, is a type of electromagnetic resonance supported by PNRs. They are plasmonic nanoresonators (PNRs) and all-dielectric nanoresonators (all-DNRs). Two new types of electromagnetic resonators that are able to confine light to nanoscale have therefore emerged. This limitation for traditional resonators, on the other hand, has fiercely stimulated the development of new types of electromagnetic resonators supporting electromagnetic resonance modes at the subwavelength scale. (1) However, traditional electromagnetic resonators cannot confine light to the nanoscale due to the diffraction limit of light, which severely impedes the applications of traditional resonators at the nanoscale in various nanophotonic devices as well as in densely integrated photonic circuits. Traditional electromagnetic resonators generally include Fabry–Pérot resonators and whispering gallery cavities. ![]() We also present the summary and major challenges in the investigation of conductive polymers supporting strong electromagnetic resonance.Įlectromagnetic resonance, a ubiquitous phenomenon of light–matter interaction, generally occurs when an electromagnetic resonator interacts with an electromagnetic wave at its inherent resonance frequencies. Both all-dielectric electromagnetic resonance and plasmon resonance will be discussed. In this Perspective, we provide a brief overview of the research progresses in electromagnetic resonance supported by organic conductive polymers. ![]() Aside from their softness and flexibility, conductive polymers also possess tunable conductivities and dielectric functions, which can be controlled by external stimuli. Conductive polymers have recently been emerging as a promising candidate for supporting electromagnetic resonance. Plasmon resonance is generally supported by metals, degenerately doped semiconductors, nonstoichiometric semiconductors, and metal nitrides, while all-dielectric electromagnetic resonance is typically supported by high-refractive-index semiconductors and metal oxides. When electromagnetic resonance occurs, the nanostructure interacts strongly with incoming light, resulting in strong electric and magnetic responses. Plasmon resonance and all-dielectric electromagnetic resonance represent two types of electromagnetic resonance, often enabled by inorganic nanostructures.
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