2-W continuous-wave and passively Q-switched Tm,Ho:YLF channeled waveguide laser at 2.05 µm.

We report on the operation of an efficient Tm,Ho:YLF depressed cladding, channeled waveguide laser in both continuous-wave (CW) and passively Q-switched (PQS) regimes, producing laser emission at the wavelength of 2.05 µm. The 70-µm diameter depressed cladding waveguide, fabricated using femtosecond laser inscription, had a low propagation loss value of 0.

Cation Vacancy-Mediated Ultrafast Hole Transport in CuBiO Photocathodes.

As a promising photocathode candidate, tetragonal CuBiO (CBO) has been studied extensively in recent years. As an intrinsically p-type material, its acceptor sites originate from the cation vacancies, which are also a potential cause of hindered hole utilization in photocathodes. In this study, the ultrafast transport dynamics of the valence band hole states in CBO photocathodes were investigated by varying their atomic composition and manipulating the p-type character.

Selective antibacterial and antibiofilm activity of chlorinated hemicyanine against gram-positive bacteria.

Antibiotic-free therapies are highly needed due to the limited success of conventional approaches especially against biofilm related infections. In this direction, antimicrobial phototherapy, either in the form of antimicrobial photothermal therapy (aPTT) or antimicrobial photodynamic therapy (aPDT), have appeared to be highly promising candidates in recent years. These are local and promising approaches for antibiotic resistant bacterial infections and biofilms.

Er:YLiF channeled waveguide laser near 2.7-2.8 µm fabricated by femtosecond laser inscription.

We report, for the first time to our knowledge, a demonstration of robust waveguide lasing near 2.7-2.8 µm in an erbium-doped fluoride host.

Broadly tunable continuous wave 2.3-µm Tm:tellurite bulk glass laser.

We report, for the first time to the best of our knowledge, a continuous wave trivalent thulium ion (Tm)-doped bulk glass near 2.3 µm. In the experiments, a bulk Tm-doped tellurite glass with the stoichiometric composition of 74TeO-12ZnO-4LaO-10NaO (Tm:TZLN) was used.