公开(公告)号：US20180231462A1

公开(公告)日：2018-08-16

申请号：US15897362

申请日：2018-02-15

申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES

发明人： Karim VINDAS ,  Elodie ENGEL ,  Loic LEROY ,  Thierry LIVACHE ,  Arnaud BUHOT

IPC分类号： G01N21/45 ,  G01N21/552

CPC分类号： G01N21/45 ,  G01N21/431 ,  G01N21/554 ,  G01N21/7703 ,  G01N21/7746 ,  G01N2021/432 ,  G01N2021/434 ,  G01N2021/458 ,  G01N2021/772

摘要： The invention relates to a method for detecting a local change in refractive index of a dielectric medium located on the surface of an optical sensor, said optical sensor comprising for this purpose a waveguide comprising a region, called the active region, covered with at least one metallic layer in contact with the dielectric medium, said method comprising the following steps: a) emitting a light beam at the input of the waveguide so that this light beam can be propagated, within the waveguide, according to at least N propagation modes, where N is a natural integer such that N≥2; b) measuring the intensity of at least one zone of the spatial distribution of the intensity of the light beam reflected by said active region of the optical sensor; and c) detecting the local change in the refractive index of the dielectric medium by means of a database supplying the link between the intensity of said at least one zone of the spatial distribution of the intensity of the light beam reflected by the active region of the optical sensor and a change in refractive index of a reference medium.