Optomechanical Measurement of the Abraham Force in an Adiabatic Liquid Core Optical Fiber Waveguide

摘要

We report quantitative experimental measurements of the Abraham forceassociated with a propagating optical wave. We isolate this force using aguided light wave undergoing an adiabatic mode transformation (AMT) along aliquid-filled hollow optical fiber (HOF). Utilizing this light intensitydistribution within the liquid, we were able to generate a time-averagednon-vanishing Abraham force density, while simultaneously suppressing theAbraham-Minkowski force density. The incident laser field induced a linearaxial displacement of the air-liquid interface inside the HOF, which provided adirect experimental measure of the Abraham force density. We find goodagreement between the experimental results and theoretical determinations ofthe Abraham force density