نتایج جستجو برای: carrier density
تعداد نتایج: 477152 فیلتر نتایج به سال:
Carrier density is one of the most important parameters in changing the electronic properties of materials. The most useful and conventional way to control the carrier density is chemical syntheses. On the other hand, physicists and electronic engineers have developed a field effect transistor (FET) device for changing the carrier density by electric fields. Furthermore, by introducing a liquid...
Magnetic penetration depth, ${\ensuremath{\lambda}}_{m}$, was measured as a function of temperature and magnetic field in single crystals low carrier density superconductor YPtBi by using tunnel-diode oscillator technique. Measurements zero DC yield London ${\ensuremath{\lambda}}_{L}(T)$, but the applied signal includes Campbell ${\ensuremath{\lambda}}_{C}(T)$, which is characteristic length at...
In this paper, modulation bandwidth characteristics of InGaAs/GaAs quantum dot (QD) laser were theoretically investigated. Simulation was done by using the fourth order Runge-Kutta method. Effect of carrier relaxation life time, temperature and current density on characteristics of tunneling injection QD laser (TIL) and conventional QD laser (CL) were analyzed. Results showed that tunneling inj...
We investigate the origins of lasing emission in a scatterer-resonance-controlled random laser made of ZnO nanopowder over a wide temperature range (20–300K). At higher temperatures ( 150 > K), the lasing emission appears around exciton recombination energies and the lasing threshold carrier density is comparable to the Mott density, indicating that the resonance-controlled random laser is goin...
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