We investigate the generation of closed-packed light rings with a minimum possible diameter using a combination of a light ring distribution generator and a diffractive beam splitter. As a light ring distribution generator, we use the wellknown S-waveplate and generate three different types of ring-shaped laser beams: an azimuthally polarized Gaussian beam, a first-order circularly polarized optical vortex beam, and a first-order linearly polarized optical vortex beam. Our modeling and experimental results show that the azimuthally polarized Gaussian beam is the best solution for splitting in comparison with the other types of beams. These results can be used in applications of high-throughput laser micro- and nanopatterning materials for the fabrication of microlasers by direct laser ablation of a thin film on glass that have great potential in optical communications and sensing applications.
We investigate laser trapping of airborne light-absorbing particles via photophoretic forces. It is well known that the use of photophoretic forces allows one to guide light-absorbing nano- and microparticles at distances of up to tens of centimeters. We use various types of structured laser beams (optical "bottle" beams and line-shaped optical traps) for manipulation of agglomerations of carbon nanoparticles. The possibility to trap and guide both single light-absorbing particles and arrays of light-absorbing particles is demonstrated. In addition, the possibility of power-dependent particle guiding is shown.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.