METHOD AND SYSTEM FOR OPTICAL DETECTION OF NANO-OBJECTS IN A LIGHT REFRACTING MEDIUM

摘要

The invention concerns a method and a system for optical detection of nano-objects in a light-refracting medium. It consists in illuminating (A) a nano-object (n-o_i) and the light-refracting medium with a heating coherent periodically amplitude-modulated electromagnetic wave (HB(O)), to generate a specific temperature and refractive index profile in the vicinity of the nano-object, and with a probe coherent (PB) electromagnetic wave to generate an emerging electromagnetic wave (EPB(O)) comprising at least one component beat modulated in amplitude at the modulation frequency of the heating coherent wave; detecting (C) on the emerging wave (EPB(O)) the intensity component beat modulated in amplitude, to isolate and represent said nano-object in the light-refracting medium. The invention is useful for detecting nano-objects in an industrial, physiological or intracellular light-refracting medium.