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 present, to our
knowledge, the first demonstration that dielectric microspheres can
be used in a wide-field infrared (IR) microscope to enhance the far
field resolution. We have observed a substantial improvement in resolution
and magnification when images are collected through polystyrene microspheres.
In addition, we demonstrate that spectroscopic imaging with a pulse-shaper
based femtosecond mid-IR laser system is possible through the dielectric
microspheres, which is a promising first step toward applying this
technique to ultrafast IR imaging methods such as pump–probe
and 2DIR microscopy.
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