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Publikováno v:
Optics Communications, 505:127511, 1-4. Elsevier
Schouten, H F, Fischer, D G & Visser, T D 2022, ' Collapse and revival of spatial coherence on free-space propagation ', Optics Communications, vol. 505, 127511, pp. 1-4 . https://doi.org/10.1016/j.optcom.2021.127511
Schouten, H F, Fischer, D G & Visser, T D 2022, ' Collapse and revival of spatial coherence on free-space propagation ', Optics Communications, vol. 505, 127511, pp. 1-4 . https://doi.org/10.1016/j.optcom.2021.127511
We demonstrate analytically and numerically that the transverse spatial coherence (the spectral degree of coherence) of the field radiated by two partially correlated electromagnetic sources oscillates as a function of propagation distance in free sp
Publikováno v:
Engineering Science and Technology, an International Journal, Vol 24, Iss 3, Pp 682-693 (2021)
In this paper, design and analysis of a flexible antenna backed with Frequency Selective Surface (FSS) is presented for wireless body area communications. Textile based compact monopole antenna (50.5 × 38 mm2) is backed with a modified square loop F
Autor:
Prasenjit Dey
Publikováno v:
Engineering Science and Technology, an International Journal, Vol 28, Iss, Pp 101013-(2022)
Wall heat transfer enhancement of a channel by introducing an adiabatic square cylinder as a vortex generator is investigated numerically and reported. An open-source computational fluid dynamics toolbox, OpenFOAM is used for the present numerical in
Autor:
Stefan Kück
Publikováno v:
Measurement: Sensors, Vol 18, Iss, Pp 100219-(2021)
In this presentation a review about the current state of the art concerning the application of deterministic single photon sources for absolute radiometry, i.e. the calibration of single photon detectors, is given. At the Physikalisch-Technische Bund
Autor:
Robin Horn, Gunther Notni, Andrei Golomoz, Paul-Gerald Dittrich, Maik Rosenberger, Richard Fütterer
Publikováno v:
Measurement: Sensors, Vol 18, Iss, Pp 100113-(2021)
Chromatic aberrations are mostly supressed in typical industrial lenses to ensure a well-defined colour image. Beside the main wavelengths which are recognizable for the human eye, multispectral cameras can sample with a more detailed chromatic (spec
Publikováno v:
Measurement: Sensors, Vol 18, Iss, Pp 100265-(2021)
It is known that linear motion errors for linear guides can be measured by the autocollimation method. In this case, it is necessary to install a mirror on the measurement target. On the other hand, if a light with a wavelength sufficiently longer th
Autor:
F. Dawel, K. Dietze, Nicolas Spethmann, K. Hammerer, V. Martinez, Lennart Pelzer, N. Aharon, P.O. Schmidt, A. Retzker, Johannes Kramer, L. Krinner
Publikováno v:
Measurement: Sensors, Vol 18, Iss, Pp 100326-(2021)
We engineer an artificial optical clock transition in 40Ca+ with a continuous dynamical decoupling scheme. It suppresses inhomogeneous tensor shifts as well as the linear Zeeman shift, making it suitable for multi-ion operation. Coherence times appro
Autor:
Margherita Maiuri, Andrea Schirato
Publikováno v:
Optical Materials: X, Vol 12, Iss, Pp 100101-(2021)
The light-driven control over the properties of optical nanostructured materials has been shown to be a promising route to achieve various functionalities, possibly on sub-picosecond time scales when ultrashort pulses are employed. Here, we discuss h
Autor:
Shahrokh Jam, Sahar Abdi Tazehabadi
Publikováno v:
Engineering Science and Technology, an International Journal, Vol 23, Iss 3, Pp 585-594 (2020)
An X-band high-power microwave antenna with arbitrarily (elliptical) polarization is proposed and investigated in this paper. The proposed antenna is founded on a reflectarray composed of printed elements and excited by the microwave energy in the az
Autor:
Philippe Boutinaud
Publikováno v:
Optical Materials: X, Vol 11, Iss, Pp 100082-(2021)
Optical Materials: X
Optical Materials: X, 2021, 11, pp.100082. ⟨10.1016/j.omx.2021.100082⟩
Optical Materials: X
Optical Materials: X, 2021, 11, pp.100082. ⟨10.1016/j.omx.2021.100082⟩
The Duffy's model is reformulated for Sb 3+ and Bi 3+ in cubic chloro- and bromoelpasolites with « 0D » perovskite structure. The new equation allows calculating the energy of the first s 2 → s 1 p 1 electron transition from crystal structure dat