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The gain-current relationships for quantum-dot and quantum-well lasers are compared experimentally and theoretically. Rigorous treatment of collision effects using quantum-kinetic equations improves precision in determination of extrinsic parameters and prediction of performance.
Recently, various kinds of extreme exciting conditions, such as the ac-dc hybrid excitation, are applied to transformers, reactors etc. with the development of the HVDC system. The modeling and estimation of stray-field losses are of increasingly importance in the electromagnetic design of such devices, and it is challenging to measurement and numerical analysis.
Excellent rectifying characteristics are demonstrated in the fab-friendly n-Si/HfO2/Ni/TiN devices with rectification ratio of >107 and the driving current of 1mA as a 1D-like selector. The rectified unipolar switching behaviors are demonstrated in the 1D1R cell structured with a diode-like device of n-Si/HfO2/Ni/TiN (1D) and a unipolar RRAM of n+-Si/HfOx/Ni/TiN (1R). Based on the measured I–V...
In this paper the influences of various pulse durations and reference cell types on CIGS thin-film PV module performance measurements with a long-pulse solar simulator are presented. Pulse duration between 50ms to 1050ms is chosen by long-pulse solar simulator in the study. The differences of module performance caused by using monolysilicon and polysilicon reference cells with/without EVA, respectively,...
A novel phase change memory (PCM) cell with Additional Top Electrode (ATE) is introduced to investigate the scaling behavior of the off-state with the dimension of amorphous state region. The electrical conduction in ultra-thin amorphous state layer is investigated. The trap spacing is one of the key parameters that govern the conduction mechanism and threshold voltage in the sub-threshold region...
Currents circulating in the plasma column of filaments in air are detected with a fast current monitor. The currents can be amplified with circularly polarized light.
A new current sweep measurement method is introduced to investigate the details of the set process. The electrode-dependent current compliance failure phenomenon is investigated in oxide-based resistive switching memory. The results indicate that the amount of conductive filaments formed in the oxide layer is the critical factor that influences the set behavior (sudden or slowly) and causes the compliance...
We have been developed an epithermal neutron source for boron neutron capture therapy(BNCT), consisting of a cyclotron accelerator that can provide a ~ 1 mA, 30 MeV proton beam, a neutron production beryllium target and the moderator that can reduce the energy of fast neutrons to an effective energy range. In order to validate the simulations, we measured the depth distribution of the thermal neutron...
Large-signal performance of five-stack 1.3 mum InAs/GaAs quantum-dot (QD) lasers has been investigated. Open eye pattern up to 10 Gb/s under direct modulation is demonstrated at 15degC.
A novel cell analysis technique based on the measurement of the electrical characteristics of a cell is described in this paper. Impedance is obtained by applying an impulse to a cell in suspension as it passes through an aperture and recording the impulse response.
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