Wide-field imaging through dielectric microspheres has emerged in recent years as a simple and effective approach for generating super-resolution images at visible wavelengths. We demonstrate that polystyrene dielectric microspheres can be used in a wide-field infrared (IR) microscope as well to enhance the far field resolution. We observe a clear improvement in resolution and magnification when images are collected through polystyrene microspheres and anticipate that super-resolution could be achieved with the addition of high quality IR objectives. In addition, we demonstrate that spectroscopic imaging with a femtosecond mid-IR laser system is possible through the dielectric spheres, showing promise for this technique to be applied to ultrafast IR imaging methods such as pump-probe and 2DIR microscopy.

Towards super-resolution 2DIR Imaging: Wide-field IR imaging and time-domain spectroscopy through dielectric microspheres

ACS Fall 2020 Virtual Meeting

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