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Transformer-based object detectors (DETR) have shown significant performance across machine vision tasks, ultimately in object detection. This detector is based on a self-attention mechanism along with the transformer encoder-decoder…

Computer Vision and Pattern Recognition · Computer Science 2023-10-16 Zhao Ning Zou , Yuhang Zhang , Robert Wijaya

Materials with large second-order nonlinearities are crucial for next-generation integrated photonics. Spontaneously oriented organic thin films prepared by physical vapor deposition offer a promising poling-free and scalable approach. This…

Nonlinear photonic delay systems present interesting implementation platforms for machine learning models. They can be extremely fast, offer great degrees of parallelism and potentially consume far less power than digital processors. So far…

Neural and Evolutionary Computing · Computer Science 2016-03-24 Michiel Hermans , Miguel Soriano , Joni Dambre , Peter Bienstman , Ingo Fischer

In this work, we have systematically studied the role of point defects in the recombination time of monolayer MoS$_2$ using time-dependent ab initio non-adiabatic molecular dynamics simulations. Various types of point defects, such as S…

Materials Science · Physics 2021-07-07 Raquel Esteban-Puyuelo , Biplab Sanyal

Several theories exist to explain persistence, most of which revolve around the distribution of traps. We aim to simulate persistence and illustrate this complex issue with a 3D trap map. For this experiment, we vary the detector voltage…

Instrumentation and Methods for Astrophysics · Physics 2014-02-19 Rachel E. Anderson , Michael Regan , Jeff Valenti , Eddie Bergeron

The understanding of depletion layers is of major importance to control the optical and electronic properties of metal oxide (MO) nanocrystals (NCs). Here, we show that depletion layer engineering is the main mechanism of photodoping of MO…

The migration motion of defects in metal halide perovskites quantum dots (MHPQDs) results in charge-carrier trapping become more complicated. We study two-step trapping mediated by mobile defects between the ground state of MHPQDs and a…

Mesoscale and Nanoscale Physics · Physics 2023-04-12 Xiao-Yi Liu , Wei-Ping Li , Yu Cui , Shao-Juan Li , Ran-Bo Yang , Zhi-Qing Li , Zi-Wu Wang

The spectral density of localized states in the band gap of pentacene (trap DOS) was determined with a pentacene-based thin-film transistor from measurements of the temperature dependence and gate-voltage dependence of the contact-corrected…

Materials Science · Physics 2010-02-08 Wolfgang L. Kalb , Bertram Batlogg

A method for assessing the quality of electronic material properties of thin-film metal oxide semiconductor field-effect transistors (MOSFETs) is presented. By investigating samples with MOCVD-grown MoS${_2}$ channels exposed to atmospheric…

Applied Physics · Physics 2025-04-03 Eros Reato , Ardeshir Esteki , Benny Ku , Zhenxing Wang , Michael Heuken , Max C. Lemme , Olof Engström

The unique electrical and optical properties of emerging two-dimensional transition metal dichal-cogenides (TMDs) present compelling advantages over conventional semiconductors, including Si, Ge, and GaAs. Nevertheless, realising the full…

Materials Science · Physics 2025-07-23 Yusuf Kerem Bostan , Elanur Hut , Cem Sanga , Nadire Nayir , Ayse Erol , Yue Wang , Fahrettin Sarcan

Long-lived ionic quantum states known as metastable electronic states in highly-charged ions (HCIs) are of great interest in fundamental physics. Especially, it generates transitions with very narrow natural linewidth which is a promising…

Atomic Physics · Physics 2023-10-23 Bingsheng Tu , Ran Si , Yang Shen , Jiarong Wang , Baoren Wei , Chongyang Chen , Ke Yao , Yaming Zou

We present a novel method for measuring the half-life of highly charged radioisotopes by non-destructive nuclear recoil detection in a Penning ion trap. A specific emphasis is placed on $\rm ^7Be^{3+}$, which plays a crucial role in stellar…

Instrumentation and Detectors · Physics 2025-08-12 Scott Moroch , Carolyn Chun , Doug VanDerwerken , Ariana Shearin , Brian Beaudoin , Klaus Blaum , Timothy Koeth

Two-dimensional molybdenum disulfide (MoS$_2$) featuring atomically thin thickness and unique electronic structure with favorable bandgap has been widely recognized as an attractive new material for the development of the next generation of…

Automated inspection plays an important role in monitoring large-scale photovoltaic power plants. Commonly, electroluminescense measurements are used to identify various types of defects on solar modules but have not been used to determine…

Reverse biasing triple-junction GaInP/Ga(In)As/Ge solar cells may affect their performance by the formation of permanent shunts even if the reverse breakdown voltage is not reached. In previous works, it was observed that, amid the three…

Quality inspection has become crucial in any large-scale manufacturing industry recently. In order to reduce human error, it has become imperative to use efficient and low computational AI algorithms to identify such defective products. In…

Machine Learning · Computer Science 2022-05-17 Bharath Kumar Bolla , Mohan Kingam , Sabeesh Ethiraj

Non-volatile memory devices have been limited to flash architectures that are complex devices. Here, we present a unique photomemory effect in MoS$_2$ transistors. The photomemory is based on a photodoping effect - a controlled way of…

The superconducting gap modulation is investigated in the presence of a weak stripe structure, using the Bogoliubov-de Gennes theory on the two-dimensional Hubbard model with nearest-neighbor site pairing interaction. We calculate the local…

Superconductivity · Physics 2009-11-07 Masanori Ichioka , Kazushige Machida

A key prediction of the trap model for the new conducting state in 2D is that the resistivity turns upwards below some characteristic temperature, $T_{\rm min}$. Altshuler, Maslov, and Pudalov have argued that the reason why no upturn has…

Strongly Correlated Electrons · Physics 2015-06-25 Philip Phillips

Imperfections in the crystal structure, such as point defects, can strongly modify the optical and transport properties of materials. Here, we study the effect of point defects on the optical and DC conductivities of single layers of…

Mesoscale and Nanoscale Physics · Physics 2014-07-09 S. Yuan , R. Roldán , M. I. Katsnelson , F. Guinea
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