Room temperature electrically pumped inversionless polariton lasing is observed from a bulk GaN-based microcavity diode. The low nonlinear threshold for occurs at 169 A/cm2 in the light-current characteristics, accompanied by collapse of emission linewidth and small blueshift peak. Measurement angle-resolved luminescence, condensation occupation momentum space, output spatial coherence polarization have also been made. A second threshold, due to conventional photon lasing, an injection 44...

Inversionless ultralow threshold coherent emission, or polariton lasing, can be obtained by spontaneous radiative recombination from a degenerate condensate with nonresonant excitation. Such excitation has, hitherto, been provided an optical source. Coherent emission GaAs-based quantum well microcavity diode electrical injection is observed here. This achieved combination of modulation doping the wells, to invoke polariton-electron scattering, and applied magnetic field in Faraday geometry...

We report ultralow threshold polariton lasing from a single GaN nanowire strongly coupled to large-area dielectric microcavity. The carrier density is 3 orders of magnitude lower than that photon observed in the same device, and 2 any existing room-temperature devices. Spectral, polarization, coherence properties emission were measured confirm lasing.

We demonstrate polarized blue single photon emission up to 200 K from an In0.2Ga0.8N quantum dot in a Al0.1Ga0.9N nanowire. The InGaN/AlGaN dot-in-nanowire heterostructure was grown on (111) silicon by plasma assisted molecular beam epitaxy. Nanowires dispersed substrate show sharp exciton and biexciton transitions the micro-photoluminescence spectra. Second-order correlation measurements performed under pulsed excitation at wavelength confirm emission, with g(2)(0) of 0.43 K. emitted...

A spatial potential trap is formed in a 6.0-μm Al(Ga)N nanowire by varying the Al composition along its length during epitaxial growth. The polariton emission characteristics of dielectric microcavity with single embedded in-plane have been studied at room temperature. Excitation provided end nanowire, and observed from lowest bandgap GaN region within trap. Comparison results those measured an identical uniform having exciton-photon detuning suggests evaporative cooling polaritons as they...

Strong coupling effects in a dielectric microcavity with single ZnO nanowire embedded it have been investigated at room temperature.A large Rabi splitting of ~100 meV is obtained from the polariton dispersion and non-linearity emission characteristics observed temperature low threshold 1.63 µJ/cm 2 , which corresponds to density an order magnitude smaller than that for Mott transition.The momentum distribution lower polaritons shows evidence dynamic condensation absence relaxation...

Composting of water hyacinth, mixed with cattle manure, rice husk and sawdust in four different proportions, was performed a pilot scale rotary drum composter.The physico-chemical characteristics, i.e., temperature, moisture content, pH, electrical conductivity, total organic matter (OM), nitrogen dynamics nutrients were evaluated during the 20 days composting process.The stabilities composts also investigated respirometric analysis, CO 2 evolution rates oxygen uptake rate (OUR).Among all...

The design, operation and performance of quantum dot spin-polarized vertical cavity surface emitting lasers (VCSELs) single-photon sources are described discussed. effects spin-induced gain anisotropy on output polarization threshold current reduction have been studied along with the high-frequency response in a VCSEL. While circular VCSEL follows out-of-plane magnetization characteristics ferromagnetic spin injector, source shows switching behavior which is explained by invoking exciton...

MANET is an infrastructure-less, fixed topology less, multi-hop and bandwidth constraint wireless network. In optimized control message broadcasting through efficient routing can results in utilization data transmission with minimum numbers of hops. An technique using a broadcast network, designed by existing cost spanning tree (MCST) also unable to provide all-nodes-to-all shortest route have issues about efficiency. this article, our network design approaches solution for efficiency...

Abstract The COVID‐19 virus has fatal effect on lung function and due to its rapidity the early detection is necessary at moment. radiographic images have already been used by researchers for diagnosis of COVID‐19. Though several existing research exhibited very good performance with either x‐ray or computer tomography (CT) images, best our knowledge no such work reported assembled both CT images. Thus increase in accuracy higher scalability main concern recent research. In this article, an...

Strong coupling effects and polariton lasing are observed at 155 K with an edge-emitting GaAs-based microcavity diode a single Al0.31Ga0.69As/Al0.41Ga0.59As quantum well as the emitter. The threshold for is 90 A/cm2, accompanied by reduction of emission linewidth to 0.85 meV blueshift wavelength 0.89 meV. Polariton confirmed observation population redistribution in momentum space spatial coherence. Conventional photon recorded same device higher pump powers.

Abstract The ease of deployment economic sensor networks has always been a boon to disaster management applications. However, their vulnerability number security threats makes communication challenging task. This paper proposes new routing technique prevent from both external and internal like hello flooding, eavesdropping wormhole attack. In this approach one way hash chain is used reduce the energy drainage. Level based event driven clustering also helps save energy. simulation results...