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Super- and subradiance are usually described in the framework of Dicke collective states, which is an ``atomic picture'' in which the electromagnetic field only provides an effective interaction between the atoms. Here, we discuss a…

Atomic Physics · Physics 2023-01-09 S. Asselie , A. Cipris , W. Guerin

The ion beam-induced charge (IBIC) analysis of a commercial silicon photodiode configured as a Position Sensitive Detector (PSD) for energetic charged particles is the subject of this report. Although the photodiode is designed for…

Instrumentation and Detectors · Physics 2024-12-17 Ettore Vittone , Georgios Provatas , Karla Ivanković Nizić , Milko Jaksic

SiPMs operate in Geiger mode, wherein photodiode cells are reverse-biased to the breakdown by even a single photon. Each cell is connected in series with a quenching resistor, which prevents cell damage and resets the cell after making a…

High Energy Physics - Experiment · Physics 2024-04-12 Gholamreza Fardipour Raki , Mohsen Khakzad

We discuss model-independent constraints on spin observables in exclusive and inclusive reactions, with special attention to the case of photoproduction.

Nuclear Theory · Physics 2015-05-13 Jean-Marc Richard , Xavier Artru , Mokhtar Elchikh , Jacques Soffer , Oleg Teryaev

Precise control of surface properties including electrical characteristics, wettability, and friction is a prerequisite for manufacturing modern organic electronic devices. The successful combination of bottom up approaches for aligning and…

Materials Science · Physics 2011-07-05 G. Hlawacek , Q. Shen , C. Teichert , A. Lex , G. Trimmel , W. Kern

Tin Sulphide is a layered compound which retains its structure when deposited as thin films by thermal evaporation. The films were found to have oriented growth with the direction of orientation changing with film thickness. The film's…

Materials Science · Physics 2016-04-20 Yashika Gupta , P. Arun

We propose an active sampling flow, with the use-case of simulating the impact of combined variations on analog circuits. In such a context, given the large number of parameters, it is difficult to fit a surrogate model and to efficiently…

Virtually all light-emitting diodes (LEDs) are encapsulated with a transparent epoxy or silicone-gel. In this paper we analyze the optical efficiency of spherical encapsulants. We develop a quasi-radiometric equation for the light…

Optics · Physics 2011-12-14 Ivan Moreno , David Bermudez , Maximino Avendano-Alejo

Integrated photonic circuits offer a promising route for studying coherent cooperative effects of a controlled collection of quantum emitters. However, spectral inhomogeneities, decoherence and material incompatibilities in the solid state…

We present a physics-based compact model for two-dimensional (2D) field-effect transistors (FETs) based on monolayer semiconductors such as MoS2. A semi-classical transport approach is appropriate for the 2D channel, enabling simplified…

Mesoscale and Nanoscale Physics · Physics 2019-08-14 Saurabh V. Suryavanshi , Eric Pop

Light-induced mechanical deformations in single-domain (PbTiO$_{3}$)$_{n}$/(SrTiO$_{3}$)$_{m}$ superlattices were simulated using first-principle calculations. By varying the chemical fraction PbTiO$_{3}$, we discover that these…

Materials Science · Physics 2024-08-02 Carmel Dansou , Charles Paillard , Laurent Bellaiche

While the basic principles and limitations of conventional solar cells are well understood, relatively little attention has gone toward maximizing the potential efficiency of photovoltaic devices based on shift currents. In this work, we…

Mesoscale and Nanoscale Physics · Physics 2017-01-23 Ashley M. Cook , Benjamin M. Fregoso , Fernando de Juan , Sinisa Coh , Joel E. Moore

We propose an equivalent circuit representation of the photogenerated charge separation and propagation in dye sensitized polycrystalline semiconductor in contact with a redox electrolyte. The suggested equivalent circuit for this type of…

Materials Science · Physics 2007-05-23 B. Vainas

Speckle is a wave interference phenomenon that has been studied in various fields, including optics, hydrodynamics and acoustics. Speckle patterns contain spectral information of the interfering waves, and of the scattering medium that…

White organic light-emitting diodes (OLEDs) are ultra-thin, large-area light sources made from organic semiconductor materials. Over the last decades, much research has been spent on finding the suitable materials to realize highly…

Materials Science · Physics 2013-08-02 Sebastian Reineke , Michael Thomschke , Björn Lüssem , Karl Leo

Operando microscopy has unveiled key mechanistic insights in battery materials during early cycling, but long-term characterization to unveil material evolution, degradation, and failure remain limited. To address this gap, we develop a…

In this paper, we study the problem of reproducing the world lighting from a single image of an object covered with random specular microfacets on the surface. We show that such reflectors can be interpreted as a randomized mapping from the…

Computer Vision and Pattern Recognition · Computer Science 2014-12-30 Zhengdong Zhang , Phillip Isola , Edward H. Adelson

Organic light-emitting diodes (OLEDs) are the leading self-emitting pixel technology in current and future small and large area displays. Once integrated with a certain layer architecture into the backplane layout, their emission colour and…

Applied Physics · Physics 2019-06-07 Felix Fries , Markus Fröbel , Pen Yiao Ang , Simone Lenk , Sebastian Reineke

In this paper, an optoelectronic device simulation framework valid for arbitrary spatial variation of electronic potentials and optical modes, and for transport regimes ranging from ballistic to diffusive, is used to study non-local photon…

Mesoscale and Nanoscale Physics · Physics 2014-11-17 Urs Aeberhard

Traditional photonic integrated circuit (PIC) inherits the mature CMOS fabrication process from the electronic integrated circuit (IC) industry. However, this process also limits the PIC structure to a single-waveguide-layer configuration.…

Optics · Physics 2022-08-23 Dachuan Wu , Bowen Yu , Venus Kakdarvishi , Yasha Yi