We present the use of Stimulated Raman Scattering (SRS) microscopy for fast and reliable classification of microfibers from environmental samples. SRS microscopy features high sensitivity and has the potential to be faster than other vibrational microspectroscopy methods. As a proof of principle, we analyzed fibers extracted from the fish gastrointestinal (GIT) tract, deep-sea and coastal sediments, surface seawater and drinking water.
Nowadays, photoemitted electrons are widely used for time-resolved electron microscopy and diffraction, enabling ultrafast time resolution at the atomic scale. Here, we benefit from the large field enhancement offered by vertical gold nanocones resonating at 1 THz, to induce THz field-driven electron emission and acceleration. The nanocones are fabricated via an advanced 3D printing technology based on two-photon lithography on a polymer and successively gold coated.
We show a 3D printed high NA compact catadioptric lens that fits inside stage‐top incubators and allows the collection of XPM‐free SRS signals. The lens delivers SRS images and spectra with a quality comparable to a signal collection with a high‐NA microscope objective.
MicroOptics is the trend in the miniaturization and integration of bulk optical elements. The main effort has been in the fabrication of refractive reflective and diffractive structures. Instead, we want to explore micro-optics that affect the polarization of light and integrate them on different devices, in particular, optical fibers.