Results 41 to 50 of about 29,107 (261)

An alternative approach to the tomographic reconstruction of smooth refractive index distributions [PDF]

Journal of the European Optical Society-Rapid Publications, 2013
Continuous, mathematically smooth Phase Objects with radial symmetry are reconstructed from cross sections of their refractive index distribution by a novel method, consisting of a linear combination of Gaussian basis functions, whose technical details ...
de la Rosa-Miranda E., Berriel-Valdos L. R., Gonzalez-Ramirez E., Alaniz-Lumbreras D., Saucedo-Anaya T., de la Rosa-Vargas J. I., Villa-Hernández J. J., Torres-Argüelles V., Castaño V. M.   +8 more
doaj   +1 more source

Covalent Functionalization of 2D Semiconductors: A Roadmap to Advanced Electronic Devices

Advanced Functional Materials, EarlyView.
This Review presents recent advances in the covalent functionalization strategies for two‐dimensional semiconductors and their implementation in modern technologies. Layered materials are modified through diverse molecular chemistries (e.g., thiols, diazonium salts, alkyl halides, and electron‐deficient species) to tailor their surface properties ...
Ramiro Quirós‐Ovies, Bin Han, Paolo Samorì   +2 more
wiley   +1 more source

Comparison of two-color methods based on wavelength and adjacent pulse repetition interval length [PDF]

Journal of the European Optical Society-Rapid Publications, 2014
This paper describes the characteristics of a two-color method based on the adjacent pulse repetition interval length (APRIL), which functions as a length unit for femtosecond optical frequency combs (FOFCs), and compares the results to the wavelength ...
Wei D., Aketagawa M.
doaj   +1 more source

Photoinduced Charge Separation in Single‐Component Squaraine Films: The Key Role of Electrostatic Disorder

Advanced Functional Materials, EarlyView.
ABSTRACT Neat films of organic dyes are an interesting technological platform for solar cells and photodetectors. Recently, the conventional biphasic bulk‐heterojunction paradigm for photoinduced charge separation was challenged by the observation that charge carriers can be photogenerated in single‐component materials. A comprehensive experimental and
Davide Giavazzi, João Pedro Ferreira Assunção, Michael Bauer, Matthias Diethelm, Wei‐Hsu Hu, Mohammad Jafarpour, Roland Widmer, Antonia Neels, Dimitrios Sapalidis, Bruno F. B. Silva, Roland Hany, Frank Nüesch, Anna Painelli   +12 more
wiley   +1 more source

Speckle reduction in double-pass retinal images using variable-focus lenses [PDF]

Journal of the European Optical Society-Rapid Publications, 2015
Speckle arises in double-pass images when coherent light is scattered by the retina. Since this noise degrades the images that are used to characterize the eye, there is special attention in reducing speckle when working with instruments based on retina ...
García-Guerra C. E., Aldaba M., Arjona M., Pujol J.   +3 more
doaj   +1 more source

Metrology of Nanoparticles

CHIMIA
In the past decades, several measurement techniques have been developed and continuously optimized to specifically analyze airborne nanoparticles. Nanoparticles have gained significant importance in fields such as air quality research, climate studies, nanotechnology, material science, particle technology and filtration.
Oliver F. Bischof, Heinz Burtscher, Martin Fierz   +2 more
openaire   +2 more sources

Drop‐on‐Demand Printed Negative Dielectric Anisotropy Liquid Crystal Droplets for Adaptive Complex Beam Manipulation and Assessment

Advanced Functional Materials, EarlyView.
Printed negative‐dielectric‐anisotropy liquid‐crystal droplets enable multidimensional full‐vectorial optical‐field sensing across polarization, phase, and wavelength, while also generating tunable skyrmionic‐like complex optical fields. ABSTRACT Adaptive manipulation of vectorial optical fields is important for optical metrology, imaging, and ...
Jinge Guo, Xuke Qiu, Runchen Zhang, Qihao Han, Liangyu Deng, Yishun Lu, Zimo Zhao, Mengmeng Li, Waqas Kamal, Junseok Ma, Yongge Ma, Steve J. Elston, Alfonso A. Castrejón‐Pita, Stephen M. Morris, Chao He   +14 more
wiley   +1 more source

A brief history of metrology: past, present, and future

International Journal of Metrology and Quality Engineering, 2019
In this paper, we take the freedom to paraphrase Stephen Hawking's well-known formula and approach, for a reflection about metrology. In fact, metrology has a past, a present, and a future. The past is marked by a rich series of events, of which we shall
Fanton Jean-Pierre
doaj   +1 more source

Multidimensional‐Encoded High‐Fidelity Spectrometers With a Floating‐Base Bipolar Junction

Advanced Functional Materials, EarlyView.
A floating‐base bipolar junction photodetector enables multidimensional spectral encoding through synergistic gate‐ and drain‐bias modulation of interfacial barrier matching. The resulting complementary spectral responses form a diverse, weakly correlated response matrix, enabling robust and high‐fidelity spectral reconstruction even at sub‐nanoampere ...
Sang‐Hyeon Lee, Junho Min, Yonas Tsegaye Megra, Min‐Hye Jeong, Hwi Je Woo, Jaewon Han, Junheon Ha, Gyunghyun Jang, Young Jae Song, Hyun‐Soo Ra, Hoon Hahn Yoon, Jong‐Soo Lee   +11 more
wiley   +1 more source

Econometric Modelling of the Impact of Metrology on the Economy in Poland

Folia Oeconomica Stetinensia
Studying the impact of metrology on the economy is a complicated matter. This is due to the specific nature of both metrology and the economy. There is no established method for determining the impact of metrology on the economy.
Doszyń Mariusz, Batóg Barbara, Majda Paweł, Pajor Mirosław, Rozkrut Dominik, Rozkrut Monika, Tarczyńska-Łuniewska Małgorzata   +6 more
doaj   +1 more source