A novel grating coupling scheme with simultaneously broadband and wide-angle efficiency for unidirectionally coupling freely propagating light into a silicon waveguide is proposed and theoretically investigated.The coupling structure is composed of two cascaded subgratings with proper spectral and angular intervals.A semi-analytical theory based on
Abstract The impact of age-related hearing loss extends beyond the auditory pathway and impacts brain areas related to cognitive impairment and even dementia.The presence of tinnitus, a sensation of sound that frequently co-occurs with hearing loss, is additionally linked to cognitive decline.Interestingly, structural neuroimaging studies have repo
Fluorescent carbon quantum dots (CQDs) have held great promise in analytical and environmental fields thanks to their congenitally fascinating virtues.However, low quantum yield (QY) and modest fluorescent stability still restrict their practical applications.In this investigation, a green hydrothermal strategy has been devised to produce water-sol
It is still challenging to investigate Collections the effect of resonator defects on the sensitivity and FOM improvement while maintaining the sensor size constant.In this paper, we design a MIM waveguide structure coupled with spherical particles to obtain a higher power refractive index sensor based on The Mi scattering and its extension theory.