Published in New Journal of Physics
Coherent multimode instabilities are responsible for several phenomena of recent interest in semiconductor lasers, such as the generation of frequency combs and ultrashort pulses. These techonologies have proven disruptive in optical telecommunications and spectroscopy applications. While the standard Maxwell-Bloch equations (MBEs) encompass such c...
Published in Journal of periodontology
This study evaluated the effectiveness of a novel pocket therapy (Er:YAG laser-assisted comprehensive periodontal pocket therapy [Er-LCPT]) for residual pocket treatment, compared with conventional mechanical treatment alone, in a randomized controlled clinical trial. Two sites in 18 patients having residual periodontal pockets of ≥5 mm depth, exta...
Published in Assistive technology : the official journal of RESNA
Freezing of gait (FOG) is one of the most disabling symptoms of Parkinsonism. Moreover, it does not respond well to medication. Visual cues have been shown to alleviate FOG in Parkinsonism; however, their efficacy is inconsistent. Currently, most mobile cueing devices are used as an open-loop cueing system, which requires manual control to enable c...
Conventional design and optimization of Photonic Crystal Surface Emitting Lasers (PCSEL) usually requires expert knowledge in semiconductor physics and optimization algorithms, which is also known as the inverse design problem. However, with the trend towards automation and depersonalization of the entire integrated circuits (IC) industry, the conv...
Published in Journal of Optics
Spatiotemporal sculpturing of light pulse with ultimately sophisticated structures represents a major goal of the everlasting pursue of ultra-fast information transmission and processing as well as ultra-intense energy concentration and extraction. It also holds the key to unlock new extraordinary fundamental physical effects. Traditionally, spatio...
Published in ECS Journal of Solid State Science and Technology
The inherent properties of Heavy metal oxide glasses have led to their widespread applications in various domains including lasers, optical fibers, optoelectronics, radiation shielding materials etc. Tellurium oxide and bismuth oxides are conditional glass forming heavy metal oxides, which when combined suitably yield significant improvement in the...
Optical microbarcodes have recently received a great deal of interest because of their suitability for a wide range of applications, such as multiplexed assays, cell tagging and tracking, anticounterfeiting, and product labeling. Spectral barcodes are especially promising because they are robust and have a simple readout. In addition, microcavity- ...
Published in Journal of Physics: Photonics
In nonlinear optical systems, the optical superposition principle breaks down. The system’s response (including electric polarization, current density, etc) is not proportional to the stimulus it receives. Over the past half century, nonlinear optics has grown from an individual frequency doubling experiment into a broad academic field. The nonline...
Published in Journal of Physics Communications
Simultaneous self-focusing and compression of ultrashort weakly-relativistic Laguerre–Gaussian laser pulses in dense plasma is investigated theoretically and numerically. A simple theoretical model is developed and used to identify parameter regimes of interest, and then three-dimensional particle-in-cell simulations are carried out to examine the ...
Published in Journal of periodontology
Lasers represent a promising method for implant decontamination, but evidence on implant surface changes and subsequent biofilm formation is limited. This study aimed to assess the effect of erbium-doped yttrium aluminum garnet (Er:YAG) laser treatment on zirconia and titanium discs, and the differences in biofilm formation as a result of surface a...
