Results 61 to 70 of about 6,059 (275)

Advances in Mode (De)Multiplexing Technologies via Circularly Symmetric Structured Light Beams

Advanced Photonics Research, EarlyView.
This review presents a comprehensive overview of mode (de)multiplexing technologies using circularly symmetric structured light beams, encompassing strategies of beam splitter combinations, multiorder diffractive gratings, optical coordinate transformations, angular dispersion lenses, multilayer cascaded modulations, and multidimensional hybrid (de ...
Qingji Zeng, Shu Chen, Zhibin Wu, Junmin Liu, Huapeng Ye, Gaiqing Zhao, Dianyuan Fan, Shuqing Chen   +7 more
wiley   +1 more source

Development of a wavefront sensor for terahertz pulses

Optics Express, 2016
Wavefront characterization of terahertz pulses is essential to optimize far-field intensity distribution of time-domain (imaging) spectrometers or increase the peak power of intense terahertz sources. In this paper, we report on the wavefront measurement of terahertz pulses using a Hartmann sensor associated with a 2D electro-optic imaging system ...
Abraham, Emmanuel, Cahyadi, Harsono, Brossard, Mathilde, Degert, Jérôme, Freysz, Eric, Yasui, Takeshi   +5 more
openaire   +4 more sources

Topological Berry Antenna on a Silicon Chip for Terahertz Wireless Communication

Advanced Photonics Research, EarlyView.
The on‐chip topological Berry antenna for 6G to Xth‐generation wireless communication is designed via integrating various Berry curvatures for an enhanced antenna aperture and radiation gain. This THz antenna has demonstrated a maximum gain of 17 dBi and chip‐to‐chip wireless communications at 20 Gbps over a distance of 15 cm.
Sonu Kumar, Ridong Jia, Yi Ji Tan, Thomas Caiwei Tan, Pascal Szriftgiser, G. Arun Kumar, Guillaume Ducournau, Arokiaswami Alphones, Ranjan Singh   +8 more
wiley   +1 more source

Pyramid Wavefront Sensor Using a Discrete Modulated Operation Method

IEEE Photonics Journal
The adaptive optics system (AOS) incorporating a modulated pyramid wavefront sensor (PWFS) represents a key area of exploration in current research aimed at enhancing the capabilities of future extremely large astronomical telescopes.
Lu Chen, Kainan Yao, Jianli Wang, Dianbing Chen, Mingda Ge, Zhiqiang Xu, Dongbo Che   +6 more
doaj   +1 more source

The Asymmetric Pupil Fourier Wavefront Sensor [PDF]

Publications of the Astronomical Society of the Pacific, 2013
5 figures, accepted for publication by ...
openaire   +4 more sources

Exploring Phonon Interference: Insights From a Nano‐Scale Silicon Double Slit Atomistic Simulation

Advanced Theory and Simulations, EarlyView.
Classical Waves at the Atomic Scale: Molecular Dynamics Reveal Phonon Interference in Silicon Nanostructures. Abstract In this study, the classic double‐slit experiment, originally developed for light waves is successfully adapted, to investigate the behavior of phonons in crystalline silicon.
Efstratios Nikidis, Paul Desmarchelier, Yoshiaki Nakamura, Anne Tanguy, Konstantinos Termentzidis, Joseph Kioseoglou   +5 more
wiley   +1 more source

A Multi-Deformable-Mirror 500 Hz Adaptive Optical System for Atmospheric Turbulence Simulation, Real-Time Reconstruction, and Wavefront Correction Using Bimorph and Tip-Tilt Correctors

Photonics
Atmospheric turbulence introduces distortions to the wavefront of propagating optical radiation. It causes image resolution degradation in astronomical telescopes and significantly reduces the power density of radiation on the target in focusing ...
Ilya Galaktionov, Vladimir Toporovsky
doaj   +1 more source

Polarization Decoupling Multi‐Port Beam‐Splitting Metasurface for Miniaturized Magneto‐Optical Trap

Advanced Science, EarlyView.
A meta‐device‐based six‐beam delivery system is proposed for miniaturized MOT, featuring a novel polarization decoupling multi‐port beam‐splitting (PD‐MPBS) metasurface using propagation and geometric phases. The fabricated PD‐MPBS samples exhibit high beam‐splitting power uniformity (within 4.4%) and polarization purities (91.3–93.2%).
Tian Tian, Chen Qing, Yuxuan Liao, Jiajun Zhu, Yongzhuo Li, Xue Feng, Dengke Zhang, Yidong Huang   +7 more
wiley   +1 more source

Testing and characterization of challenging optics and optical systems with Shack Hartmann wavefront sensors [PDF]

EPJ Web of Conferences, 2019
The Shack-Hartman wavefront sensor is a common metrology tool in the field of laser, adaptive optics and astronomy. However, this technique is still scarcely used in optics and optical system metrology.
Siv Julie, Mayer Rafael, Beaugrand Guillaume, Tison Guillaume, Juvénal Rémy, Dovillaire Guillaume   +5 more
doaj   +1 more source

Enhanced Spectral Tunability by Sub‐10 nm Nanogaps in Graphene‐Metal Hybrid Metasurfaces

Advanced Science, EarlyView.
A tunable mid‐infrared metasurface integrating graphene and metal antenna arrays with sub‐10 nm nanogaps is presented, overcoming the ≈20 nm limit of conventional fabrication. The enhanced spectral tuning range and modulation depth are enabled by combining electron‐beam lithography, thin metal deposition, and directional ion milling to precisely define
Fei Han, Zaoyang Lin, Kacper Pilarczyk, Hongwei Tang, Guy A. E. Vandenbosch, Joris Van de Vondel, Xuezhi Zheng, Niels Verellen, Ewald Janssens   +8 more
wiley   +1 more source