Absorption-induced transmission in plasma microphotonics.

Ionised gas, i.e., plasma, is a medium where electrons-ions dynamics are electrically and magnetically altered.

Fast and efficient nanoparticle trapping using plasmonic connected nanoring apertures.

The manipulation of microparticles using optical forces has led to many applications in the life and physical sciences. To extend optical trapping towards the nano-regime, in this work we demonstrate trapping of single nanoparticles in arrays of plasmonic coaxial nano-apertures with various inner disk sizes and theoretically estimate the associated forces. A high normalized experimental trap stiffness of 3.

Fano-Resonant, Asymmetric, Metamaterial-Assisted Tweezers for Single Nanoparticle Trapping.

Plasmonic nanostructures overcome Abbe's diffraction limit to create strong gradient electric fields, enabling efficient optical trapping of nanoparticles. However, it remains challenging to achieve stable trapping with low incident laser intensity. Here, we demonstrate Fano resonance-assisted plasmonic optical tweezers for single nanoparticle trapping in an array of asymmetrical split nanoapertures on a 50 nm gold thin film.

Simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) 5S to 6S transition using one-color two-photon excitation.

We experimentally demonstrate a one-color two-photon transition from the 5S ground state to the 6S excited state in rubidium (Rb) vapor using a continuous wave laser at 993 nm. The Rb vapor contains both isotopes (Rb and Rb) in their natural abundances. The electric dipole-allowed transitions are characterized by varying the power and polarization of the excitation laser.

Fiber-bundle-basis sparse reconstruction for high resolution wide-field microendoscopy.

In order to observe deep regions of the brain, we propose the use of a fiber bundle for microendoscopy. Fiber bundles allow for the excitation and collection of fluorescence as well as wide field imaging while remaining largely impervious to image distortions brought on by bending. Furthermore, their thin diameter, from 200-500 m, means their impact on living tissue, though not absent, is minimal.