photonique

Sensitivity collapse in whispering gallery mode refractometric sensing of porous microspheres: A finite-window mode-misassignment mechanism

Fluorescence-based whispering-gallery-mode (WGM) sensors routinely report refractometric sensitivities far below the intrinsic limit Sintrinsic = λ/neff, yet the origin of this discrepancy has not been rigorously quantified. Here we show that a…

Sadok Kouz, Abdel El Abed

Optics Communications - 2026