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Silicon thin films for coverages ($\theta$) between 0.3 and 3 monolayers have been grown on rutile \ce{TiO2}(110)-(1x1) at room temperature and studied by x-ray and ultra-violet photoelectron spectroscopies, Auger electron spectroscopy, and…

Materials Science · Physics 2011-06-03 J. Abad , C. Gonzalez , P. L. de Andres , E. Roman

Semiconductor nanowires offer the possibility to grow high-quality quantum-dot heterostructures, and, in particular, CdSe quantum dots inserted in ZnSe nanowires have demonstrated the ability to emit single photons up to room temperature.…

Charge density waves (CDW) have been reported in NdNiO$_2$ and LaNiO$_2$ thin films grown on SrTiO$_3$ substrates using Ni-$L_3$ resonant x-ray scattering in Refs. [1-3]. In their comment [arXiv:2306.15086] on these reports, Pelliciari et…

Graphene-Silicon Schottky diode photodetectors possess beneficial properties such as high responsivities and detectivities, broad spectral wavelength operation and high operating speeds. Various routes and architectures have been employed…

Mesoscale and Nanoscale Physics · Physics 2020-01-09 H. Selvi , N. Unsuree , E. Whittaker , M. P. Halsall , E. W. Hill , P. Parkinson , T. J. Echtermeyer

A negative kink in excess conductivity is observed in p-type non-degenerate (moderate dopant concentration) silicon wafers when excited by a very narrow pulse of 532 nm laser appearing just after the complete positive decay of dark…

Materials Science · Physics 2021-09-29 Biswadev Roy , Branislav Vlahovic , Marvin H. Wu

We report on the growth and characterization of a new class of photocathode structures for application as electron sources to produce high brightness electron beams for accelerator applications. The sources are realized using III-Nitride…

Accelerator Physics · Physics 2022-04-06 L. Cultrera , E. Rocco , F. Shahedipour-Sandvik , L. D. Bell , J. K. Bae , I. V. Bazarov , P. Saha , S. Karkare , A. Arjunan

We use crystalline silicon (Si) antennas to efficiently extract broadband single-photon fluorescence from shallow nitrogen-vacancy (NV) centers in diamond into free space. Our design features relatively easy-to-pattern high-index Si…

We demonstrate surface plasmon-induced enhancements in optical imaging and spectroscopy on silver coated silicon nanocones which we call black silver substrate. The black silver substrate with dense and homogeneous nanocone forest structure…

Materials Science · Physics 2014-02-10 Zhida Xu , Logan Liu

We present a temperature dependent photoluminescence study of silicon optical nanocavities formed by introducing point defects into two-dimensional photonic crystals. In addition to the prominent TO phonon assisted transition from…

Mesoscale and Nanoscale Physics · Physics 2015-05-14 N. Hauke , T. Zabel , K. Mueller , M. Kaniber , A. Laucht , D. Bougeard , G. Abstreiter , J. J. Finley , Y. Arakawa

Highly sensitive photodetectors with single photon level detection is one of the key components to a range of emerging technologies, in particular the ever-growing field of optical communication, remote sensing, and quantum computing.…

Optics · Physics 2021-09-16 Yi Zhu , Vidur Raj , Ziyuan Li , Hark Hoe Tan , Chennupati Jagadish , Lan Fu

Microwave plasma discharges working at low pressure are nowadays a well-developed technique mainly used to provide radiations at different wavelengths. The aim of this work is to show that those discharges are an efficient windowless VUV…

Earth and Planetary Astrophysics · Physics 2017-05-05 S. Tigrine , N. Carrasco , L. Vettier , G. Cernogora

Scintillation characteristics of a thallium doped sodium iodide (NaI(Tl)) crystal with a dimension of 0.6 x 0.6 x 2 cm3 are studied by attaching a silicon photomultiplier (SiPM) direct to the crystal over a temperature range from 93 to 300…

Instrumentation and Detectors · Physics 2022-03-02 H. Y. Lee , J. A. Jeon , K. W. Kim , W. K. Kim , H. S. Lee , M. H. Lee

X-ray photodesorption yields of $^{15}$N$_2$ and $^{13}$CO are derived as a function of the incident photon energy near the N ($\sim$400 eV) and O K-edge ($\sim$500 eV) for pure $^{15}$N$_2$ ice and mixed $^{13}$CO:$^{15}$N$_2$ ices. The…

Instrumentation and Methods for Astrophysics · Physics 2022-08-17 R. Basalgète , D. Torres-Díaz , A. Lafosse , L. Amiaud , G. Féraud , P. Jeseck , L. Philippe , X. Michaut , J-H. Fillion , M. Bertin

We investigate the use of a non-degenerate parametric oscillator (NDPO) as a source for quantum lithography, for which the light can have high-flux and strong non-classical features. This builds on the proposal of Boto, et al. [A. N. Boto,…

Quantum Physics · Physics 2010-07-28 Hugo Cable , Reeta Vyas , Surendra Singh , Jonathan P. Dowling

The lack of straightforward epitaxial integration of useful telecom lasers on silicon remains the major bottleneck for bringing optical interconnect technology down to the on-chip level. Crystalline silicon itself, an indirect…

We report on the realization of a stable solid state room temperature source for single photons. It is based on the fluorescence of a single nitrogen-vacancy (NV) color center in a diamond nanocrystal. Antibunching has been observed in the…

Nitrogen-doped ultrananocrystalline diamond (N-UNCD) is a promising material for a variety of neural interfacing applications, due to its unique combination of high conductivity, bioinertness, and durability. One emerging application for…

Atomic and electronic structures of TiO_2(110) surface with possible adsorptional, substitutional and interstitial Au or Pt elemental impurities at full and one-sixth monolayer concentrations were investigated by density functional theory…

Strongly Correlated Electrons · Physics 2012-11-19 Ersen Mete , Oğuz Gülseren , Şinasi Ellialtıoğlu

3D excitation-emission luminescence spectra of Bi-doped optical fibers of various compositions were measured in a wide wavelength range 450-1700 nm. Such luminescence spectra were obtained for Bi-doped pure silica and germania fibers, and…

We demonstrate on chip generation of correlated pairs of photons in the near-visible spectrum using a CMOS compatible PECVD Silicon Nitride photonic device. Photons are generated via spontaneous four wave mixing enhanced by a ring resonator…

Quantum Physics · Physics 2018-03-29 Robert Cernansky , Francesco Martini , Alberto Politi