Results 121 to 130 of about 61,321 (227)

Faraday–Ramsey Rotation in Ultrathin Alkali Vapor Cells as an Analogy to Atomic‐Beam Systems

Laser &Photonics Reviews, EarlyView.
This work demonstrates that ultrathin rubidium vapor cells can emulate atomic‐beam behavior through geometry‐dependent velocity filtering. Employing a spatially separated pump–probe scheme and Faraday–Ramsey rotation, the study reveals coherent atomic dynamics without buffer gas or anti‐relaxation coatings. This approach offers a compact pathway toward
Mark Dikopoltsev, Eliran Talker, Yefim Barash, Noa Mazurski, Uriel Levy   +4 more
wiley   +1 more source

Generation of Optical Quasiparticles with Spin–Orbit Conversion in a Single Q‐Plate

Laser &Photonics Reviews, EarlyView.
Spin‐Orbit conversion approach with a q‐plate for generating optical quasiparticles. ABSTRACT In this work, we detail a novel approach which can be used for the generation of optical quasiparticles. This process leverages both spin‐orbit conversion control with wavelength de‐tuning in a commercially available q‐plate.
Jingni Geng, Srinivasa Rao Allam, Quan Sheng, Takashige Omatsu   +3 more
wiley   +1 more source

Robust double Bragg diffraction via detuning control

Physical Review Research
We present a theoretical model and numerical optimization of double Bragg diffraction, a widely used technique in atom interferometry. We derive an effective two-level-system Hamiltonian based on the Magnus expansion in the so-called quasi-Bragg regime ...
Rui Li, V. J. Martínez-Lahuerta, S. Seckmeyer, Klemens Hammerer, Naceur Gaaloul   +4 more
doaj   +1 more source

NIR/VIS Dual‐Comb Spectroscopy Comparing High and Low Repetition Rate Regimes

Laser &Photonics Reviews, EarlyView.
This work compares dual‐comb spectroscopy at lower and higher repetition rates, emphasizing the inherent trade‐off between spectral and temporal resolution. The 80 MHz system provides high‐resolution spectra suitable for analyzing complex molecular structures, whereas the free‐running 1 GHz platform enables fast measurements for real‐time trace gas ...
Alexander Eber, Mithun Pal, Lukas Fürst, Emily Hruska, Christoph Gruber, Marcus Ossiander, Birgitta Bernhardt   +6 more
wiley   +1 more source

Tunable Compact UHF RFID Metal Tag Based on CPW Open Stub Feed PIFA Antenna

International Journal of Antennas and Propagation, 2012
For the ultrahigh frequency radio frequency identification (UHF RFID) metal tag, it always has the difficulties of compact designing, especially for the conjugate impedance matching, low antenna gain, and fabrication or environmental detuning.
Lingfei Mo, Chunfang Qin
doaj   +1 more source

Ultralow‐Backscattering Induced Mode Splitting in Chipscale Valley Photonic Topological Cavities

Laser &Photonics Reviews, EarlyView.
The proposed in‐situ metrology based on mode splitting quantifies the ultralow backscattering of topological valley edge states at a single sharp corner, demonstrating near‐lossless topological transport (0.09 dB/corner) on a silicon chip. This work provides insight into the robustness of the photonic valley system and shows the great potential of ...
Kaiji Chen, Wenhao Wang, Yi Ji Tan, Zhonglei Shen, Ridong Jia, Ranjan Singh   +5 more
wiley   +1 more source

A Novel 9‐Channel 1H, 3‐Channel 31P Radiofrequency Coil for Interleaved Multinuclear Studies of Human Calf Muscle at 7 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a double‐tuned calf coil with excellent 1H and 31P performance to study muscle physiology by interleaved 1H/31P MRS and parallel imaging at 7 T. Methods The coil combines three 1H transceive dipoles, six 1H receive‐only loops and three 31P transceive loops, arranged in a nested, half‐cylindrical layout.
Veronika Cap, Vasco Rafael Rocha dos Santos, Kostiantyn Repnin, Onisim Soanca, Elmar Laistler, Peter Wolf, Graham J. Kemp, Roberta Frass‐Kriegl, Martin Meyerspeer   +8 more
wiley   +1 more source

Deuterium 1‐Channel Transmit/16‐Channel High Impedance Receive Array Combined With 16‐Channel 1H Dual‐Row Transceiver Array for 7 Tesla Brain Imaging

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop and evaluate an 2H/1H coil configuration that enables deuterium metabolic imaging at 7 T while preserving high‐quality 1H anatomical imaging. Methods An 16‐channel 2H high‐impedance receive array was combined with a 2H transmit birdcage and a 16‐channel dual‐row 1H transceiver array.
Bei Zhang, Wenkai Liang, Chichen Dong, Anke Henning   +3 more
wiley   +1 more source

DINAMIKA DAN PENGENDALIAN SISTEM QUADRUPLE TANK MENGGUNAKAN CONTROLLER PI-PID DENGAN METODE DETUNING

Journal of Research and Technology, 2020
In general, industrial processes have characteristics as multivariable processes where the variables interact with one another which causes poor performance.
Zahrotul Azizah
doaj  

Damping of vibrations in superconducting quarter wave resonators

Physical Review Accelerators and Beams, 2019
Ambient mechanical vibrations could cause significant detuning in superconducting accelerating cavities, disturbing the acceleration regime. The mechanical damper, first developed at Laboratori Nazionali di Legnaro, Istituto Nazionale di Fisica Nucleare ...
Liu Yang, Vladimir Zvyagintsev, R. E. Laxdal, Bhalwinder Waraich   +3 more
doaj   +1 more source