title: Simultaneous amplitude-contrast and phase-contrast surface plasmon resonance imaging by use of digital holography.
abstract: The surface plasmon resonance imaging technique provides a tool that allows high-throughput analysis and real-time kinetic measurement. A simultaneous amplitude-contrast and phase-contrast surface plasmon resonance imaging method is presented. The amplitude-contrast and phase-contrast images are simultaneously obtained by use of digital holography. The detection sensitivity of amplitude-contrast imaging and phase-contrast imaging can compensate for each other. Thus, the detectable sample components may cover a wider range of refractive index values for the simultaneous amplitude-contrast and phase-contrast imaging method than for the phase-contrast imaging method or amplitude-contrast imaging method. A detailed description of the theory and an experiment of monitoring the evaporation process of a drop of NaCl injection in real time are presented. In addition, the amplitude-contrast image has less coherent noise by digital holography.
authors.affiliation: Key Laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes, Jinan University, Guangzhou, 510632,  China ; Department of Optoelectronic Engineering, Jinan University, Guangzhou, 510632,  China.
authors.forename: Shiping
authors.initials: S
authors.lastname: Li
authors.forename: Jingang
authors.initials: J
authors.lastname: Zhong