公开(公告)号：US09678009B2

公开(公告)日：2017-06-13

申请号：US14877944

申请日：2015-10-08

Applicant: NATIONAL CHENG KUNG UNIVERSITY

Inventor： Chun-Hung Lin ,  Wen-Yu Chen

IPC: G01J4/00 ,  G01N21/552

CPC classification number: G01N21/553 ,  G01N21/554

Abstract: A method for a localized surface plasmon resonance (LSPR) sensing system is disclosed. The LSPR sensing system has an optical detection system and a test specimen with metal nanoparticles arranged in an anisotropic periodic manner that generates a phase signal of the LSPR sensing system. The method includes: emitting an incident light toward the test specimen to excite the metal nanoparticles, thereby generating an emergent light; using the optical detection system to detect phases of a first polarization state and a second polarization state of the emergent light, where the first polarization state is perpendicular to the second polarization state; and obtaining a phase difference spectrum between the phases of the first and second polarization states, thereby determining a half maximum (FWHM) of the phase difference spectrum.