Ultrastrong Optical Focusing Using Dielectric Tips Embedded in Nanocavities: Applications in Ultrastrong Optical Nonlinearities; Light Sources; Detectors; and Nanoscale Spectroscopy

This technology introduces dielectric cavity arrays with specially designed pairs of dielectric tips, resulting in cavities with a low mode volume (e.g., 7*10^(-5)λ^3, where λ is the resonance wavelength of the cavity) and a high quality factor Q (e.g., 10^6 or more). These dielectric cavity arrays have applications in various fields, including Raman spectroscopy, second harmonic generation, optical signal detection, microwave-to-optical transduction, and as light-emitting devices. By concentrating incident light and enhancing its interaction with the surroundings, these cavities offer new possibilities for advanced optical applications.