Experimental Investigation of an L-Shaped Very-Small-Aperture Laser

Xu, Jiying; Wang, Jia; Gai, Hongfeng; Tian, Qi; Wang, Boxiong; Hao, Zhibiao; Han, Sang-Ok

doi:10.1088/0256-307x/23/9/066

Cited by 6 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Over the last ten years, the study of the impurity states in nanostructure semiconductors, such as quantum dots (QDs), has become the subject of extensive investigations in both basic and applied research [1][2][3][4][5]. Recently, a new class of QDs called inhomogeneous quantum dots (IQDs) or quantum-dot quantum wells (QDQW) were studied both theoretically and experimentally [6][7][8][9]. QDQW are composed of two semiconductor materials, one of which with a smaller band gap, is embedded between the core and outer shell of the material with the larger band gap.…”

Section: Introductionmentioning

confidence: 99%

Diamagnetic susceptibility of a confined donor in inhomogeneous quantum dots

Rahmani¹,

Zorkani²,

Jorio³

2011

Phys. Scr.

View full text Add to dashboard Cite

The binding energy and diamagnetic susceptibility χ dia are estimated for a shallow donor confined to move in GaAs-GaAlAs inhomogeneous quantum dots. The calculation was performed within the effective mass approximation and using the variational method. The results show that the binding energy and the diamagnetic susceptibility χ dia depend strongly on the core radius and the shell radius. We have demonstrated that there is a critical value of the ratio of the inner radius to the outer radius which may be important for nanofabrication techniques. The binding energy E b shows a minimum for a critical value of this ratio depending on the value of the outer radius and shows a maximum when the donor is placed at the center of the spherical layer. The diamagnetic susceptibility is more sensitive to variations of the radius for a large spherical layer. The binding energy and diamagnetic susceptibility depend strongly on the donor position.

show abstract

Section: Introductionmentioning

confidence: 99%

Diamagnetic susceptibility of a confined donor in inhomogeneous quantum dots

Rahmani¹,

Zorkani²,

Jorio³

2011

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Among them, lead iron niobate, Pb(Fe 0.5 Nb 0.5 )O 3 (PFN) has been the center of attention in recent years because of its high relative permittivity (2000-20,000) and multiferroic properties [8][9][10][11]. PFN having complex perovskite structure were discovered and synthesized during 1950s [12]. Because of the disordered B-site, the different structures of PFN were reported by several researchers.…”

Section: Introductionmentioning

confidence: 99%

Influence of Zr substitution on structural, dielectric and magnetic behavior of lead calcium iron niobate

Puri

Bahel

Narang

2015

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

This work is an investigation of phase formation, crystal structure, microstructure, dielectric and magnetic properties of (Pb 0.45 Ca 0.55 )(Fe 0.5 Nb 0.5 ) 1-y Zr y O 3 where y varies from 0.00 to 0.15 in the steps of 0.03 synthesized by columbite precursor method. XRD results indicate the main phase of pseudo-cubic symmetry for all the solid solutions. Dielectric properties of the synthesized samples have been measured as a function of frequency from 200 kHz to 120 MHz at room temperature. Obtained results have shown that the introduction of Zr has improved the dielectric properties by decreasing the loss tangent values. Narrow magnetic hysteresis loops were observed at room temperature. When increasing Zr content at B-site, the saturation magnetization (M s ), remnant magnetization (M r ) and coercive field (H c ) increase up to y = 0.03 and then decreased.

show abstract

“…Quasi-one-dimensional (Q1D) nanostructured materials including nanotubes, nanowires and nanorods have been successfully prepared and have received much attention, as they play a crucial role in future nanodevices with novel electrical, magnetic and optical properties. Semiconductor nanoribbons (NRs), a prominent type of one-dimensional nanostructures [1], are good candidates as building blocks for functional nanodevices such as waveguides [2,3], photoconductive optical switches [4,5], sensors [6], acoustic resonators [7] and field effect transistors (FETs) [8]. Cadmium sulfide (CdS) is one of the most important group II-VI semiconductors with a direct band gap of 2.42 eV at room temperature [9][10][11], having vital optoelectronic applications such as laser, light-emitting diodes and nanolasers [12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of indium doped cadmium sulfide nanoribbons

Ismathullakhan

Sharif²

2008

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

This paper reports the synthesis and optical characterization of indium doped cadmium sulfide (CdS) nanoribbons (NRs) by the metal-catalyzed vapour–liquid–solid growth method. The NRs had a hexagonal wurtzite structure, lengths of up to 100 µm, widths of 0.6–15 µm and thicknesses of 30–60 nm. Indium doping into the CdS lattice was identified and characterized by low-temperature photoluminescence and photoconductivity measurements. Temperature-dependent photoluminescence (PL) measurements showed that the PL spectra of the In-doped CdS NRs have three emission peaks at 9 K, which can be attributed to band edge emission (2.510 eV) and shallow donor levels (2.398 eV and 2.366 eV) due to doping, respectively. Photoconductive characteristics including spectral response and light intensity response of the doped CdS NR were also investigated. The dark current in the doped CdS NRs was found to be one order higher in magnitude than that of the intrinsic, which can be attributed to effective incorporation of the indium dopant in the CdS crystal lattice and, subsequently, the reduction in the recombination barrier in the nanostructures. The current jumped from 1.8 × 10−9 to 2.1 × 10−5 A upon white light illumination with a power density of 2 mW cm−2. The presented results show promising application of these materials in the field of optoelectronics as photo detectors.

show abstract

Experimental Investigation of an L-Shaped Very-Small-Aperture Laser

Cited by 6 publications

References 11 publications

Diamagnetic susceptibility of a confined donor in inhomogeneous quantum dots

Diamagnetic susceptibility of a confined donor in inhomogeneous quantum dots

Influence of Zr substitution on structural, dielectric and magnetic behavior of lead calcium iron niobate

Synthesis and characterization of indium doped cadmium sulfide nanoribbons

Contact Info

Product

Resources

About