Results 21 to 30 of about 1,945,269 (285)

Optical materials characterization

, 1974
Abstract : The refractive index of a sample of hot-forged CaF2 was measured from 0.25 micrometers to 8.0 micrometers by means of the minimum-deviation method on a precision spectrometer. Data were obtained near 20 C and 34 C. Each data set was fitted to a three-term Sellmeier-type dispersion equation, which permits interpolation of refractive index as ...
Albert Feldman, Deane Horowitz, Roy M Waxler, Irving H Malitson, Marilyn J Dodge   +4 more
openaire   +1 more source

Nonlinear optical effects in artificial materials

, 2007
We consider some nonlinear phenomena in metamaterials with negative refractive index properties. Our consideration includes a survey of previously known results as well as identification of the phenomena that are important for applications of this new ...
Gabitov, Ildar R., Maimistov, Andrei I.
core   +1 more source

Electrical actuation of single-crystal diamond MEMS resonators at high temperatures

Functional Diamond
Achieving efficient low-voltage actuation of microelectromechanical system (MEMS) resonators in high-temperature environments poses a difficult topic due to the thermal interference and the risk of high-temperature failure.
Zilong Zhang, Keyun Gu, Guo Chen, Masataka Imura, Meiyong Liao   +4 more
doaj   +1 more source

Gallium Oxide Nanostructures: A Review of Synthesis, Properties and Applications

Nanomaterials, 2022
Gallium oxide, as an emerging semiconductor, has attracted a lot of attention among researchers due to its high band gap (4.8 eV) and a high critical field with the value of 8 MV/cm.
Nishant Singh Jamwal, Amirkianoosh Kiani
doaj   +1 more source

Using effective medium theories to design tailored nanocomposite materials for optical systems

, 2018
Modern optical systems are subject to very restrictive performance, size and cost requirements. Especially in portable systems size often is the most important factor, which necessitates elaborate designs to achieve the desired specifications.
Burger, Sven, Decker, Manuel, Pertsch, Thomas, Petschulat, Jörg, Scharf, Toralf, Staude, Isabelle, Werdehausen, Daniel   +6 more
core   +1 more source

Calculating Cross Sections of Composite Interstellar Grains [PDF]

, 1999
Interstellar grains may be composite collections of particles of distinct materials, including voids, agglomerated together. We determine the various optical cross sections of such composite grains, given the optical properties of each constituent, using
Bussoletti E., Desert F. X., Henning Th., John S. Mathis, Mathis J. S., Nikolai V. Voshchinnikov, Ossenkopf V., Ossenkopf V., Stognienko R., Videen G., Wu Z. P.   +10 more
core   +3 more sources

‘They Need to Hear You Say It’: Healthcare Professionals’ Perspectives on Barriers and Enablers to End‐of‐Life Discussions With Adolescents and Young Adults With Cancer

Pediatric Blood &Cancer, EarlyView.
ABSTRACT End‐of‐life conversations with adolescents and young adults (AYAs) with cancer rarely occur without the guidance of healthcare professionals. As a part of the ‘Difficult Discussions’ study, focused on palliative care and advance care planning discussions with AYAs with cancer, we investigated the factors that healthcare professionals identify ...
Justine Lee, Holly Evans, Claire E. Wakefield, Antoinette Anazodo, Richard J. Cohn, Brittany C. McGill, Elizabeth A. Lobb, Lori Wiener, Madeleine L. Juhrmann, Ursula M. Sansom‐Daly   +9 more
wiley   +1 more source

Optical properties of single-crystal diamond MEMS: mitigating substrate interference

Functional Diamond
The precise characterization of bulk properties of thin homoepitaxial diamond layers with micrometer thickness is difficult due to the interference from the substrate.
Keyun Gu, Zilong Zhang, Zhaozong Zhang, Jian Huang, Yasuo Koide, Satoshi Koizumi, Meiyong Liao   +6 more
doaj   +1 more source

Robust and orange-yellow-emitting Sr-rich polytypoid α-SiAlON (Sr3Si24Al6N40:Eu2+) phosphor for white LEDs

Science and Technology of Advanced Materials
Nitrides and oxynitrides isostructural to α-Si3N4 (M-α-SiAlON, M = Sr, Ca, Li) possess superb thermally stable photoluminescence (PL) properties, making them reliable phosphors for high-power solid-state lighting.
Mehdi Estili, Rong-Jun Xie, Kohsei Takahashi, Shiro Funahashi, Tohru S. Suzuki, Naoto Hirosaki   +5 more
doaj   +1 more source

Thickness-Dependent Differential Reflectance Spectra of Monolayer and Few-Layer MoS2, MoSe2, WS2 and WSe2

, 2018
The research field of two dimensional (2D) materials strongly relies on optical microscopy characterization tools to identify atomically thin materials and to determine their number of layers. Moreover, optical microscopy-based techniques opened the door
Barcons, David, Bratschitsch, Rudolf, Castellanos-Gomez, Andres, De Lara, David Perez, de Vasconcellos, Steffen Michaelis, Drüppel, Matthias, Frisenda, Riccardo, Gant, Patricia, Gonzalez-Abad, Sergio, Marauhn, Philipp, Molina-Mendoza, Aday J., Niu, Yue, Rohlfing, Michael, Schmidt, Robert, Taghavi, Najme S.   +14 more
core   +1 more source