We formulate quantum tunneling as a time-of-arrival problem: we determine the detection probability for particles passing through a barrier at a detector located a distance L from the tunneling region. For this purpose, we use a Positive-Operator-Valued-Measure (POVM) for the timeof-arrival determined in [1]. This only depends on the initial state, the Hamiltonian and the location of the detect...

In this paper we present studies of the I-V characteristics of CdZnTe detectors with Pt contacts fabricated from highresistivity single crystals grown by the high-pressure Brigman process. We have analyzed the experimental I-V curves using a model that approximates the CZT detector as a system consisting of a reversed Schottky contact in series with the bulk resistance. Least square fits to the...

Erosion or deposition of sub-micron layers of graphite or other materials can be measured by bombarding a sub-surface layer of “B or ‘Li with thermal neutrons and observing with a surface-barrier detector the energy loss of the prompt alphas or tritons produced. To demonstrate the feasibility of this technique. a (525Ok 250) A layer of boron and a (1.25 +0.05) pm layer of Li,B,O, were electron-...

A complete system modeling and characterization of a wideband differential terahertz (THz) direct detector, integrated in commercial CMOS technology, is presented. The detector consists recently developed double leaky-slot lens antenna that operates from 200 to 600 GHz combination with Schottky barrier diode (SBD) detection circuit. proposed methodology, starting low-frequency measurements on s...

An analytic model is presented to describe the space-charge-limited ~SCL! conduction in Si homojunction interfacial work-function internal photoemission far-infrared detectors. The basic detector unit is a thin n– i–n structure, which is operated at low temperatures and characterized by an interfacial work function at the n– i interface. The unique aspects of this case lead to simple analytic e...

The terahertz region (1-10 THz) has potential applications in many areas, such as chemical sensing, medical imaging and free-space optical communications. With the demonstration of terahertz sources, it is quite necessary to develop the detection technology in terahertz. Here we propose an electrically tunable quantum dot infrared photodetector to detect the terahertz region. The proposed detec...

Radon concentrations were measured with long-term alpha-track radon detectors along with radon scout. Radon gas emanates from the radium content of terrestrial products, like tobacco leaves. Smoking materials contain, beside tobacco, many other additives that may also contain radium traces. These additives aim at exciting smoker’s feeling via chemical reactions, which may be disrupted by alpha ...

Ultrafast, high quantum efficiency single photon detectors are among the most sought-after elements in modern quantum optics and quantum communication. Close-to-unity photon detection efficiency is essential for scalable measurement-based quantum computation, quantum key distribution, and loophole-free Bell experiments. However, imperfect modal matching and finite photon absorption rates have u...

Wide-bandgap semiconductors such as zinc selenide (ZnSe) have become popular for ultraviolet (UV) photodetectors due to their broad UV spectral response. Schottky barrier detectors made of ZnSe in particular have been shown to have both low dark current and high responsivity. This paper presents the results of electrical and optical characterization of UV sensors based on ZnSe/Ni Schottky diode...

We propose to exploit currently available tunnel ferromagnetic Josephson junctions realize a hybrid superconducting qubit. show that the characteristic hysteretic behavior of barrier provides an alternative and intrinsically digital tuning qubit frequency by means magnetic field pulses. To illustrate functionalities limitation device, we discuss coupling readout resonator effect fluctuations. T...