A5030164268- Near-Field Optical Microscopy
- Integrated Circuits and Semiconductor Failure Analysis
- Plasmonic and Surface Plasmon Research
- Photonic Crystals and Applications
- Optical Coatings and Gratings
- Photonic and Optical Devices
- Force Microscopy Techniques and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Surface and Thin Film Phenomena
- Luminescence Properties of Advanced Materials
- GaN-based semiconductor devices and materials
- Semiconductor Quantum Structures and Devices
- Nonlinear Optical Materials Studies
- Terahertz technology and applications
- Quantum optics and atomic interactions
- Electromagnetic Compatibility and Measurements
- Acoustic Wave Resonator Technologies
- Mechanical and Optical Resonators
- Advanced Fluorescence Microscopy Techniques
- Quantum and electron transport phenomena
- Orbital Angular Momentum in Optics
- Phase-change materials and chalcogenides
- Solid State Laser Technologies
- Random lasers and scattering media
- Optical properties and cooling technologies in crystalline materials
Universidad Nacional Autónoma de México
2013-2025
Universidad Autónoma de Baja California
2006-2023
Hong Kong University of Science and Technology
2016
University of Hong Kong
2016
Nanchang Institute of Technology
1997
Aalborg University
1993-1995
Aero Institute
1993
In this letter, we report on fabrication and luminescent properties of phosphor powders thin films Eu3+ doped alumina Al2O3. The were fabricated by combustion synthesis process at a low temperature, 280 °C showed strong photoluminescent cathodoluminescent emissions. Powders Al2O3 concentration 1.0 mol % deposited quartz-glass substrates to form means laser ablation. Under ultraviolet excitation electron beam excitation, these samples containing microcrystalline structures luminescence due...
Abstract High-speed maskless nanolithography is experimentally achieved on AgInSbTe thin films. The lithography was carried out in air at room temperature, with a GaN diode laser (λ = 405 nm), and large sample disk of diameter 120 mm. normal width the written features measures 46 ± 5 nm, about 1/12 diffraction allowed smallest light spot, speed reaches 6 ~ 8 m/s, tens times faster than traditional writing methods. resolution instantaneously tunable by adjusting power. reason behind...
The electronic and optical properties of a composite created by introducing magnetite cluster into NaA zeolite have been investigated in this work using DFT calculations. results obtained indicate that the are enhanced because cluster. However, exhibited outside differ from those it presents when is part composite. It noteworthy exhibits magnetic half-semiconductor strong response within visible ultraviolet regions spectrum.
Work is reported on optical antennas of complex molecules. Optical a nanometric particle are widely considered for light relays in various on-chip applications. An appealing candidate an antenna molecule, example, huge cell containing few hundred atoms. The properties, such as the radiation patterns, may be optimized. optimization includes design and synthesis contents structures participating atoms their positions. A convenient method to simulate solve local field at sites atoms,...
A scanning probe interacts with the optical near field a sample surface. The whole system radiates, and radiation is collected in far-field domain. far contains subwavelength information about microscopic description of device presented. self-consistent procedure employed that takes into account coupling effects between objects probe–surface to calculate induced at surface features. stemming from can then be described half-space. intensity entrance detector determines received signals. Two...
An external-reflection scanning near-field optical microscope with the detected light polarized perpendicular to polarization of coupled into fiber is presented. When various metallic gratings are scanned, it shown that lateral and depth resolutions this better than 100 10 nm, respectively.
Electromagnetic radiation of electric dipoles, which are placed near a metallic surface and excited by the ongoing polaritons, is investigated. The dipoles used to represent scattering centers, irregulars, mesoscopic particles. A formalism distinguishes evanescent field propagating waves in dipole employed calculate scattered polariton near- far-field zones. Numerical studies local at sites were carried out for 50 with various distances between surface. An enhanced was obtained some cases,...
An experimental technique that makes use of the intensity interference pattern formed by light propagates directly from single-mode fiber tip and is reflected surface under anoblique angle incidence developed to control tip-surface distance in near-field opticalmicroscopy. It shown using another as a detector with polished edge placed at near one can determine separation an accuracy better than 15 nm distances less 1 µm. The proposed used investigate influence shape measurements.
Formation of bumps in chalcogenide phase change thin films during the laser writing process is theoretically and experimentally investigated. The involves basically fast heating quenching stages. Circular are formed after cooling, shape size depend on various parameters such as temperatures, power, beam size, pulse duration, etc. In extreme cases, holes at apex bumps. To understand their formation great interest for data storage. present work, a theoretical model established process,...
In the present study, pseudo-nonlinear absorption characteristics are numerically demonstrated in z-scan measurements even for samples of pure linear materials. The curves look similar to nonlinear an open-aperture measurement. Numerical results reveal that plausible effects stem from two sources, namely changes incident angle and azimuth polarization focused beam during It is found when laser by a lens with large numerical aperture, influence due change becomes substantial cannot be...
Abstract Faujasite-type zeolite X (FAU-X) with a layered morphology was successfully synthesized by an additive-free route at crystallization temperature of 90 °C for 24 h. The sample dried 70 40 h (designated FAU) and then calcined 450 5 FAU-450). Both samples were analyzed X-ray diffraction (XRD), which confirmed the formation FAU structure. In addition, from XRD data Energy Dispersive Spectroscopy, Si/Al ratio determined to be ~ 1.20, is typical FAU-X zeolite. Scanning Electron Microscopy...
In laser applications, the size of focus spot can be reduced beyond diffraction limit with a thin film strong nonlinear optical Kerr effect. We present concise theoretical simulation device. The origin super-resolution is found to mainly from reshaping effect due strongly refraction mediated multi-interference inside film. addition, both and self-focusing effects have been explored negligible for highly refractive ultrathin films in comparison Finally, theoretic model has verified...