180 LLE Review, Volume 79 Since the discovery of the ponderomotive force over 40 years ago, it has been known that charged particles interacting with an oscillating electromagnetic field will seek regions of low intensity.1 It was immediately proposed that with the appropriate field distribution, particles could be trapped with this force.2 The case of electron confinement with a specially shap...

Low-intensity lasers are used for prevention and management of oral mucositis induced by anticancer therapy, but the effectiveness of treatment depends on the genetic characteristics of affected cells. This study evaluated the survival and induction of filamentation of Escherichia coli cells deficient in the nucleotide excision repair pathway, and the action of T4endonuclease V on plasmid DNA e...

A single frequency Ti:sapphire (Ti:S) laser with continuous frequency-tuning and low intensity noise is presented, in which an extra nonlinear (NL) loss crystal is placed inside the resonator instead of the traditional etalon locking system. When a NL crystal is inserted into a home-made Ti:S laser resonator, the single frequency laser of 1.27 W at 795 nm with a continuous frequency-tuning rang...

We propose and demonstrate a purely optical approach to trap and align particles using the interaction of polarized light with periodic nanostructures to generate enhanced trapping force. With a weakly focused laser beam, we observed efficient trapping and transportation of polystyrene beads with sizes ranging from 10 mum down to 190 nm as well as cancer cell nuclei. In addition, alignment of n...

We report quantitative dissociation yields for the reaction CH3OH (vOH) → nhn CH31OH induced by infrared multiphoton excitation of methanol pre-excited to various levels of the OH stretching vibration (vOH50, 1, 3, 5). The yields are measured by detecting OH using laser induced fluorescence. It is demonstrated that for low levels of pre-excitation (vOH50, 1, 3) there is a substantial nonlinear ...

We present a detailed investigation of pulse width and spectral dynamics of an Er-doped soliton fiber ring laser, mode-locked by a carbon-nanotube-polymer composite. The laser is stable and produces ∼ 650 fs pulses at a fundamental repetition rate of 20.8MHz. The carbon nanotube saturable absorber has a low saturation intensity of ∼ 18.9 MW/cm and a 16.9% reduction in absorption (due to saturat...

A relativistic plasma shutter technique is proposed and tested to remove the sub-100 ps pedestal of a high-intensity laser pulse. The shutter is an ultrathin foil placed before the target of interest. As the leading edge of the laser ionizes the shutter material it will expand into a relativistically underdense plasma allowing for the peak pulse to propagate through while rejecting the low inte...

We demonstrate the generation of axially modulated plasma waveguides using spatially patterned high-energy laser pulses. A spatial light modulator (SLM) imposes transverse phase front modulations on a low-energy (10 mJ) laser pulse which is interferometrically combined with a high-energy (130-450 mJ) pulse, sculpting its intensity profile. This enables dynamic and programmable shaping of the la...

ENWEndNote BIBJabRef, Mendeley RISPapers, Reference Manager, RefWorks, Zotero AMA de la Barra Ortiz H, Freire Gavilan C, Rojas MA. Efficacy of low-intensity laser therapy in trigeminal neuralgia: a systematic review. Physiotherapy Quarterly. 2022;30(4):14-26. doi:10.5114/pq.2022.121152. APA Ortiz, H., Gavilan, C., & Rojas, M. A. (2022). Quarterly, 30(4), 14-26. https://doi.org/10.5114/pq.2022.1...