Optical nanoparticles are nowadays one of the key elements of photonics. They do not only
allow optical imaging of a plethora of systems (from cells to microelectronics), but, in many …

The ability to manipulate small particles of matter using the forces of light, optical trapping,
forms the basis of a number of exciting research areas, spanning fundamental physics …

We demonstrate bowtie apertures that were designed and fabricated by a lift-off process to
optically trap individual, 30 nm, silica-coated quantum dots (scQD). Simulations and …

Most progress on optical nanoparticle control has been in liquids, while optical control in air
has proven more challenging. By utilizing an air chamber designed to have a minimum of …

We report on stable, long-term immobilization and localization of a single colloidal
Er3+/Yb3+ codoped upconverting fluorescent nanoparticle (UCNP) by optical trapping with …

We report the optical trapping of a single streptavidin-coated CdSe/ZnS quantum dot whose
overall diameter is around 15–20 nm, in a microfluidic chamber by an all-dielectric (silicon) …

The applications of quantum dots (QDs) in two-photon (2P) excitation applications demand
reliable data about their 2P absorption (2PA) cross sections (σ2PA). In the present study …

We present an analytical platform by combining near-infrared optical tweezers with two-
photon excitation for fluorescence detection of H5N1 virus gene sequences. A …

Laser tweezers afford quantum dot (QD) manipulation for use as localized emitters. Here, we
demonstrate fluorescence by radiative energy transfer from optically trapped colloidal QDs …

Direct analysis of biomolecules in complex biological samples remains a major challenge
for fluorescence-based approaches due to the interference of background signals. Herein …