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Label-free surface-sensitive photonic microscopy with high spatial resolution using azimuthal rotation illumination
Yan Kuai1, Junxue Chen2, Xi Tang1
1Institute of Photonics, Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China.
Science Advances
|April 5, 2019
Summary
Surface plasmon resonance microscopy (SPRM) now offers enhanced spatial resolution and greater substrate flexibility. This advancement in label-free imaging opens new avenues for biological applications.
Area of Science:
- Biomedical Imaging
- Optics
- Surface Science
Background:
- Surface plasmon resonance microscopy (SPRM) provides label-free, high-surface-sensitivity imaging.
- Current SPRM limitations include poor spatial resolution (micrometers) and reliance on metal films, restricting wavelength choices and cell culture compatibility.
Purpose of the Study:
- To enhance the spatial resolution of SPRM.
- To develop a more versatile label-free surface-sensitive photonic microscopy technique.
Main Methods:
- Implemented azimuthal rotation illumination to improve SPRM spatial resolution.
- Replaced metal films with dielectric multilayers to create a new microscopy platform.
Main Results:
- Achieved up to an order of magnitude enhancement in SPRM spatial resolution.
- Developed a novel label-free surface-sensitive photonic microscopy with flexible working wavelengths, polarization, and imaging parameters.
Conclusions:
- Azimuthal rotation illumination significantly boosts SPRM spatial resolution.
- The new dielectric-based microscopy offers broader applicability in biological research by overcoming limitations of traditional SPRM.
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