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Implementations of quantum information require single-photon detectors (SPDs) with high detection efficiency (DE) at a wavelength of 940 nm, which is a challenge for the available semiconducting SPDs. Superconducting nanowire SPDs (SNSPDs) are capable of detecting visible and near-infrared single photons with high DE. However, these detection capabilities place stringent design requirements on the...
In this paper we report the novel assembly method of a biosensor unit based on 64 pixel photodetector array with a proprietary semiconductor quantum dots (QDs) quantum well (QW) hybrid structure. There is significantly lower dark current for optimized high sensitivity detector. The capacitive trans-impedance amplifier (CTIA)-correlated double sampling (CDS) readout circuit can readout weak optical...
We have developed a micro spectrometer with 64 pixel GaAs base n-i-dot-in-well-i-n photo detector linear array. The physical model has established by its current-voltage, capacitance-voltage and Capacitance to frequency relationship. The model could be easily integrated with the readout circuit for special readout design optimization to realize the wide wavelength range under different radiation (especially...
A novel quantum effect photodetector array consisted of AlAs/GaAs/InGaAs/GaAs/InAs/ quantum-dots in quantum-well hybrid structure has been tested. It showed a wide response wavelength range from 400nm to 1000nm. The low threshold voltage (−0.8V) and the high responsibility (10A/W) at 77K made it a good choice for optical detection. A custom-made capacitor feedback transimpendance amplifier (CTIA)...
A design of low-power voltage detector (VD) based on current comparison technology is presented. This VD samples the power supply voltage and converts the sampled voltage to a current which will be compared with a reference. The current comparison technology simplifies the design without use of the resistor string and voltage comparators, and thus reduces the core area. The VD detects three thresholds...
In recent years great progress has been made on remote generation and detection of THz radiation produced in air by intense femtosecond laser pulses [1, 2]. We present here results showing that it is possible to control the directionality of the Terahertz radiation emitted by two adjacent femtosecond laser filaments formed in air. Calculations for two neighboring filaments predict that the THz emission...
Epilepsy affects approximately one percent of the world population. Antiepileptic drugs are ineffective in approximately 30% of patients and have side effects. We are developing a noninvasive, or minimally invasive, transcranial focal electrical stimulation (TFS) system through our novel concentric ring electrodes to control seizures. Here we report on the development of a seizure detecting algorithm...
At Kyoto University Research Reactor Institute(KURRI), we installed a Cyclotron-Based Epithermal Neutron Source(C-BENS) for Boron Neutron Capture Therapy(BNCT). C-BENS consists of a cyclotron accelerator that can provide a ~ 1000 μA, 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. C-BENS can provide...
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