Open AccessWavelength-multiplexing surface plasmon holographic microscopy
Author(s) -
Jiwei Zhang,
Shixun Dai,
Jinzhan Zhong,
Teli Xi,
Chaojie Ma,
Ying Li,
Jianglei Di,
Jianlin Zhao
Publication year - 2018
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.013549
Subject(s) - optics , digital holographic microscopy , refractive index , holography , surface plasmon resonance , materials science , microscopy , wavelength , surface plasmon polariton , surface plasmon , digital holography , plasmon , phase contrast imaging , optoelectronics , physics , phase contrast microscopy , nanotechnology , nanoparticle
Surface plasmon holographic microscopy (SPHM), which combines surface plasmon microscopy with digital holographic microscopy, can be applied for amplitude- and phase-contrast surface plasmon resonance (SPR) imaging. In this paper, we propose an improved SPHM with the wavelength multiplexing technique based on two laser sources and a common-path hologram recording configuration. Through recording and reconstructing the SPR images at two wavelengths simultaneously employing the improved SPHM, tiny variation of dielectric refractive index in near field is quantitatively monitored with an extended measurement range while maintaining the high sensitivity. Moreover, imaging onion tissues is performed to demonstrate that the detection sensitivities of two wavelengths can compensate for each other in SPR imaging. The proposed wavelength-multiplexing SPHM presents simple structure, high temporal stability and inherent capability of phase curvature compensation, as well as shows great potentials for further applications in monitoring diverse dynamic processes related with refractive index variations and imaging biological tissues with low-contrast refractive index distributions in the near field.