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Common transparent polymer films such as cellophane and household tape are frequently used as examples of birefringent materials in textbooks and classroom demonstrations. Qualitatively, birefringence is often demonstrated by layering such…

Physics Education · Physics 2022-08-10 Aaron D. Slepkov

This paper reports optical and nanomechanical properties of seldom studied highly a-axis oriented AlN thin films for the first time. These films were deposited by reactive DC magnetron sputtering technique at an optimal target to substrate…

Materials Science · Physics 2015-03-20 Feby Jose , R. Ramaseshan , S. Tripura Sundari , S. Dash , M. S. R. N. Kiran , A. K. Tyagi , U. Ramamurty

Thermal conductivities $\Lambda $ of amorphous carbon thin films are measured in the temperatures range 80--400 K using the $3\omega $ method. Sample films range from soft a-C:H prepared by remote-plasma deposition ($\Lambda = 0.20$ W…

Materials Science · Physics 2009-10-31 Andrew J. Bullen , Keith E. O'Hara , David G. Cahill , Othon Monteiro , Achim von Keudell

We investigate neutron propagation in a middle layer of a planar waveguide which is a tri-layer thin film. A narrow divergent microbeam emitted from the end face of the film is registered. The neutron channeling length is experimentally…

Applied Physics · Physics 2018-08-13 S. V. Kozhevnikov , T. Keller , Yu. N. Khaydukov , F. Ott , F. Radu

The study of the optical transmission matrix (TM) of a sample reveals important statistics of light transport through it. The accuracy of the statistics depends strongly on the orthogonality and completeness of the basis in which the TM is…

Optics · Physics 2020-12-29 Pritam Pai , Jeroen Bosch , Allard P. Mosk

This work combines the principles of the heat spreader method and imaging capability of the thermoreflectance measurements to measure the in-plane thermal conductivity of thin-films without the requirement of film suspension or multiple…

Applied Physics · Physics 2020-11-24 T. Zhu , D. H. Olson , P. E. Hopkins , M. Zebarjadi

We present a combined study with conventional far-infrared and time-domain terahertz ellipsometry of the temperature dependent optical response of SrTiO3 thin films (85 and 8.5 nm) that are grown by pulsed-laser deposition on LSAT…

Zinc nitride films were synthesized by reactive radio frequency (rf) magnetron sputtering of a zinc target using an Ar+N2 mixture. The as-deposited films were annealed in the air and O2 at 300 {\deg}C for 1 hr. The XRD measurements…

Materials Science · Physics 2023-01-18 Ting Wen , Ahalapitiya H Jayatissa

UV-glass photomultiplier tubes (PMTs) have poor photon detection efficiency for wavelengths below $300\,\text{nm}$ due to the opaqueness of the window material. Costly quartz PMTs could be used to enhance the efficiency below…

Instrumentation and Detectors · Physics 2018-03-14 S. Joosten , E. Kaczanowicz , M. Ungaro , M. Rehfuss , K. Johnston , Z. -E. Meziani

Superconducting MgB2 thin films were fabricated on Al2O3(0001) substrates under an ex-situ processing conditions. Boron thin films were deposited by pulsed laser deposition followed by a post-annealing process. Resistance measurements of…

Superconductivity · Physics 2019-08-17 S. F. Wang , S. Y. Dai , Y. L. Zhou , Z. H. Chen , D. F. Cui , J. D. Yu , M. He , H. B. Lu , G. Z. Yang

Gaseous and liquid xenon particle detectors are being used in a number of applications including dark matter search and neutrino-less double beta decay experiments. Polytetrafluoroethylene (PTFE) is often used in these detectors both as…

Instrumentation and Detectors · Physics 2015-05-14 C. Silva , J. Pinto da Cunha , A. Pereira , V. Chepel , M. I. Lopes , V. Solovov

The suitability of using the angular peak shape of the coherent backscattered light for estimating the light transport parameters of biological media has been investigated. Milk and methylene blue doped milk were used as tissue phantoms for…

Medical Physics · Physics 2009-10-31 S. Anantha Ramakrishna , K. Divakara Rao

The electrical conductivity of PVC films prepared with a patented plasticizer of type "A" was measured with high precision automated setup, based on standard ring sell with a voltage range much less than breakdown voltage. Continual…

Mesoscale and Nanoscale Physics · Physics 2010-03-12 D. V. Vlasov , L. A. Apresyan , V. I. Krystob , T. V. Vlasova

Amorphous silicon materials and its alloys become extensively used in some technical applications involving large area of the microelectronic and optoelectronic devices. However, the amorphous-crystalline transition, segregation and…

Materials Science · Physics 2009-02-13 A. Csik , G. A. Langer , G. Erdelyi , D. L. Beke , Z. Erdelyi , K. Vad

Within the framework of QED, spectral-angular distribution of the twisted photons emitted by relativistic electrons during axial channeling were investigated.

Quantum Physics · Physics 2026-05-12 K. B. Korotchenko , Y. P. Kunashenko

Transmission of terahertz waves through a thin layer of the superconductor NbN deposited on an anisotropic R-cut sapphire substrate is studied as a function of temperature in a magnetic field oriented parallel with the sample. A significant…

Superconductivity · Physics 2015-10-06 M. Šindler , R. Tesař , J. Koláček , L. Skrbek

Recently, hexagonal boron nitride (hBN) layers have generated a lot of interest as ideal substrates for 2D stacked devices. Sapphire-supported thin hBN films of different thicknesses are grown using metalorganic vapour phase epitaxy…

Materials Science · Physics 2019-07-15 Kousik Bera , D. Chugh , Atanu Patra , H. Hoe Tan , C. Jagadish Anushree Roy

Liquid xenon (LXe) based detectors for rare event searches in particle and astroparticle physics are optimized for high xenon scintillation light collection and low background rate from detector materials. Polytetrafluoroethylene (PTFE,…

Instrumentation and Detectors · Physics 2021-01-15 Lutz Althüser , Sebastian Lindemann , Michael Murra , Marc Schumann , Christian Wittweg , Christian Weinheimer

We use the finite-element method for simulating light transmission through a 2D-periodic array of rectangular apertures in a film of highly conductive material. We report results with a relative error of the transmissivity lower than 0.01%.…

Optics · Physics 2009-09-22 D. Lockau , L. Zschiedrich , S. Burger

Engineering optical emission from two dimensional, transition metal dichalcogenides (TMDs) materials such as Tungsten disulphide (WS2) has implications in creating and understanding nanophotonic sources. One of the challenges in controlling…

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