Results 121 to 130 of about 3,742 (297)
, 2000 The linewidth of a distributed feedback semiconductor laser or a distributed Bragg reflector laser having one or more second order gratings is reduced by using an external cavity to couple the vertical emission back into the laser. This method and device
Hendricks, Herbert D., Cook, Anthony L.
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Optical Quality of InAs/InP Quantum Dots on Distributed Bragg Reflector Emitting at 3rd Telecom Window Grown by Molecular Beam Epitaxy. [PDF]
Materials (Basel), 2021 Smołka T +10 more
europepmc +1 more source
Generating Unconventional Spin‐Orbit Torques With Patterned Phase Gradients in Tungsten Thin Films
Advanced Materials, EarlyView.ABSTRACT A key aim in spintronics is to achieve current‐induced magnetization switching via spin‐orbit torques without external magnetic fields. For this, the focus of recent work has been on introducing controlled lateral gradients across ferromagnet/heavy‐metal devices, giving variations in thickness, composition, or interface quality.
Lauren J. Riddiford +9 more
wiley +1 more source
A blue resonant cavity light emitting diode with a 50% Al-content crack-free GaN/AlGaN distributed Bragg reflector is reported. The structure shows excellent optical properties and the benefits of the cavity structure are clearly seen in the narrowed ...
Damilano, B. +5 more
core +1 more source
Scientific Reports, 2017 We report optical positioning of single quantum dots (QDs) in planar distributed Bragg reflector (DBR) cavity with an average position uncertainty of ≈20 nm using an optimized photoluminescence imaging method.
Shunfa Liu +11 more
doaj +1 more source
Advanced Materials, EarlyView.As‐spun carbon materials produced from Lignosulfonate, gelatin, and alginate, selected for water solubility, and ability to produce templated sustainable carbon nanostructures. Gelatin and alginate are sacrificial during thermal processing, allowing the production of engineered high surface area nanostructures, which are further characterized for ...
Judith Miralda‐Jalle +6 more
wiley +1 more source
Modal Gain and Loss in Three-Layer Optical Waveguides
IEEE AccessA perturbation analysis based on the imaginary part of the complex permittivity rather than on the electric fields associated with stimulated emission shows that the formula for TM gain applies to any increase or decrease in the mode amplitude, whether ...
Nikhil Polley +5 more
doaj +1 more source
Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities
Advanced Materials, EarlyView.This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen +7 more
wiley +1 more source
Near‐Unity Chiral Lasing Enabled by Quasi‐Bound States in the Continuum
Advanced Materials, EarlyView.Nanoimprinted chiral array that supports bound states in the continuum is doped with an efficient non‐chiral molecule (Rhodamine‐B) acting as gain medium to produce fully circularly polarized lasing emission. The chiral lasing wavelength can be tuned across the emission band of Rhodamine‐B by adjusting the coating thickness of the TiO2 high refractive ...
Jose Mendoza‐Carreño +5 more
wiley +1 more source
Distributed Bragg reflector high-Q cavities and lasers in Al2O3 on silicon [PDF]
, 2011 Bragg gratings in Al2O3 channel waveguides are used to demonstrate distributed Bragg reflector cavities with Q-factors of 1.02×106. An integrated Al2O3:Yb3+ waveguide laser with 67% slope efficiency and 47 mW output power is subsequently ...
Bernhardi, Edward +4 more
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