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Article
Influence of Electromagnetic Field Power and Temperature of Inductively Coupled Plasma Etching on the Uniformity of a Patterned Sapphire Substrate
Patterned sapphire substrate technology can improve the growth performance and luminous efficiency of light-emitting diodes. In this work, dry etching by inductively coupled plasma is studied and adjusted. The...
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Article
Visual Study of the Impact and Freezing Process of a Water Droplet on Carbon Fiber Plates
The present study investigates the effects of droplet impact height, tilt angle, and surface temperature on the impact and freezing process of water droplet on a cold surface by using a Motionpro high-speed ca...
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Article
On the Discussions of Nonlinear Terms in the Large Deformation Model of Thin-Walled Cylindrical Shells
The significance of the nonlinear terms in the governing equations to describe the transiently large deformation of a thin-walled cylindrical shell under impact pressures is discussed in this paper. Firstly, t...
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Article
Open AccessDual topological states in the layered titanium-based oxypnictide superconductor BaTi2Sb2O
Topological superconductors have long been predicted to host Majorana zero modes which obey non-Abelian statistics and have potential for realizing non-decoherence topological quantum computation. However, mat...
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Article
Crystal structure prediction of ReN2 under high pressure
Three ReN2 phases (Pbcn, C2/m and P4/mbm) are searched to be stable under different pressures by the swarm-intelligence-based CALYPSO method. Pressure-induced phase transitions from Pbcn phase to C2/m phase at 68...
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Article
Defect Structure and Evolution of GaN-Based Light-Emitting Diodes on Planar and Cone-Patterned Sapphire Substrates
Epitaxial layers of GaN and InGaN/GaN multi-quantum well light emitting diodes (LEDs) were prepared both on cone-shaped patterned sapphire substrates and conventional sapphire substrates. The mechanism of nucl...
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Article
The high-energy particle package onboard CSES
The China Seismo-Electromagnetic Satellite (CSES) aims to monitor space electromagnetic fields, ionospheric plasma, high-energy charged particles and other features of the global space environment. The high-en...
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Article
Instability-free ion acceleration by two laser pulses
We demonstrate the instability-free ion acceleration regime by introducing laser control with two parallel circularly polarized laser pulses at an intensity of I = 6.8 × 1021 W/cm2, normally incident on a hydroge...
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Article
Observational Results of the ChangE-1 Solar X-Ray Monitor
We present the primary observations of the Solar X-ray Monitor (SXM) payload onboard the ChangE-1 lunar exploration satellite, which was launched on 24 October 2007. The SXM payload uses a solid-state silicon P-I...
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Article
Fabrication and simulation of glass micromachining using CO2 laser processing with PDMS protection
Traditional glass micromachining using laser processing in air would produce many kinds of defects, such as bulges, debris, micro-cracks and scorches. In this article, a poly-dimethylsiloxane (PDMS) protection...
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Article
Study on the Phase Transition of Lanthanide-Doped Titania Nanoparticles by Photoacoustic Spectroscopy
In this study, fairly uniform anatase TiO2 spheres doped with neodymium (III) have been prepared. It is found that the impregnation of neodymium (III) can remarkably inhibit the anatase–rutile transition. In orde...
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Article
Wavelength switching based on quantum-dot vertical-cavity surface-emitting laser
This study investigates, for the first time, static and dynamic wavelength switching characteristics of the 1.3 μm quantum-dot vertical-cavity surface-emitting laser (QD VCSEL). The free-running QD VCSEL with ...
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Article
Open AccessScattering mechanism in a step-modulated subwavelength metal slit: a multi-mode multi-reflection analysis
In this paper, the scattering/transmission inside a step-modulated subwavelength metal slit is investigated in detail. We firstly investigate the scattering in a junction structure by two types of structural ...
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Article
A stable multiwavelength SOA-based fiber ring laser with ultra-narrow wavelength spacing
This investigation demonstrates a stable multiwavelength fiber ring laser with ultra-narrow wavelength spacing using a semiconductor optical amplifier (SOA). A delay interferometer and a mirror are used as a d...
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Article
Experimental observation of bright-dark pulse emitting in an all-fiber ring cavity laser
We demonstrate the emission of bright pulse and dark pulse in a simple all-fiber ring cavity laser by using self-pulsing technique. The switching between bright pulse and dark pulse can be realized by properly...
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Article
Wide-band tunable passively Q-switched all-fiber ring laser based on nonlinear polarization rotation technique
A wide-band tunable passively Q-switched all-fiber ring laser based on nonlinear polarization rotation (NPR) technique is demonstrated. The NPR-induced intensity-dependent loss effect acts as an artificial sat...
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Article
LD end-pumped c-Cut Nd:YVO4/KTP self-Raman laser at 560 nm
Intra-cavity sum frequency generation (SFG) of c-cut Nd:YVO4 self-Raman laser was investigated for the first time. A 4 × 4 × 10 mm3 KTP crystal with a type-II phase-matching cutting angle (θ = 83.4°, φ = 0°) was ...
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Article
Passively Q-switched mode-locking Erbium-doped fiber laser with net-normal dispersion using nonlinear polarization rotation technique
We experimentally demonstrate a passively Q-switched mode-locking (QML) operation in an Erbium-doped fiber ring laser with net normal dispersion by using nonlinear polarization rotation technique. A 2 m long s...
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Article
Sub-100 kHz repetition rate erbium-doped fiber laser in anomalous dispersion regime
We propose and demonstrate a simple but efficient way to generate low repetition rate pulses in an erbium-doped fiber ring laser by using self-pulsing technique. About 2.25 km long single mode fiber is used to...
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Article
Electronic structures for armchair-edge graphene nanoribbons under a small uniaxial strain
We theoretically investigate the electronic structures for armchair-edge graphene nanoribbons (AGNRs) under a small in-plane uniaxial strain along armchair (longitudinal) and zigzag (transversal) direction, r...