Results 131 to 140 of about 556,769 (269)

A complex amplitude control method of metasurface based on full phase modulation

Results in Physics, 2023
Unlike the Pancharatnam-Berry phase and spin-decoupled metasurface, which only modifies the phase of the cross-polarization components, the full-phase modulation metasurface achieves independent wavefront control of the co– and cross-polarization ...
Zhitong Sun, Jiahao Zhi, Yuanlu Chen, Bijun Xu, Zhifang Qiu, Xiaogang Wang, Xinning Yu   +6 more
doaj  

Deconvolution Techniques in Optical Coherence Tomography: Advancements, Challenges, and Future Prospects

Laser &Photonics Reviews, EarlyView.
This review explores deconvolution techniques in optical coherence tomography (OCT), addressing resolution degradation from point‐spread functions (PSF). It reviews foundational principles (e.g., Richardson‐Lucy deconvolution) to advanced AI‐driven methods, emphasizing clinical translation and interdisciplinary collaboration. Real‐world implementations
Syeda Aimen Abbasi, Di Mei, Yuanyuan Wei, Chao Xu, Syed Muhammad Tariq Abbasi, Sadia Shakil, Wu Yuan   +6 more
wiley   +1 more source

Recent Advances in Geometric Phase Metasurfaces: Principles and Applications

Advanced Physics Research
The concept of geometric phase traversing numerous domains in physics and has been a continuous source of fascination and inspiration for researchers.
Faizan Faraz, Jie Tian, Taufeeq Ur Rehman Abbasi, Weiren Zhu   +3 more
doaj   +1 more source

Optical Metasurfaces for the Next‐Generation Biosensing and Bioimaging

Laser &Photonics Reviews, EarlyView.
Recent advances in this understanding of light‐matter interactions, combined with innovations in the design and fabrication of large‐scale nanostructured metasurfaces, have enabled transformative approaches to biosensing and bioimaging. This review explores innovations in refractometric sensing, surface‐enhanced spectroscopy, and super‐resolution ...
Anthony J. El‐Helou, Yiting Liu, Chaohao Chen, Fan Wang, Hatice Altug, Peter J. Reece, Ying Zhu   +6 more
wiley   +1 more source

Bifunctional Electromagnetic Manipulation of Surface Waves Using Metasurfaces Under One Circularly Polarized Incidence

Photonics
The ability to freely manipulate the wavefronts of surface plasmon polaritons (SPPs) or surface waves (SWs), particularly with multifunctional integration, is of great importance in near-field photonics.
Min Kang, Lixing Chen, Shuaipeng Qin, Liang Ma, Aoxiang Rui, Shiqing Li   +5 more
doaj   +1 more source

From the generalized reflection law to the realization of perfect anomalous reflectors [PDF]

arXiv, 2016
The use of the generalized Snell's law opens wide possibilities for the manipulation of transmitted and reflected wavefronts. However, known structures designed to shape reflection wave fronts suffer from significant parasitic reflections in undesired directions: In fact, the desired field distributions do not satisfy Maxwell's equations if the ...
arxiv  

Bendable Fiber Lens for Minimally Invasive Endoscopy

Laser &Photonics Reviews, EarlyView.
Translating ex vivo imaging to minimally invasive in vivo applications is of outstanding scientific and socioeconomic relevance. 3D imaging based on tiny lensless fiber endoscopes requires complex setups and computational schemes, so far. Bridging this gap, imaging through a unique optical fiber that mimics the functionality of a lens but is minimally ...
Ronja Stephan, Elias Scharf, Kinga Zolnacz, Waclaw Urbanczyk, Katharina Hausmann, Matthias Ließmann, Johannes Gürtler, Tom Glosemeyer, Jürgen Czarske, Michael Steinke, Robert Kuschmierz   +10 more
wiley   +1 more source

Full‐Space Spin‐Controlled Four‐Channel Metalens With Equal Power Distribution and Broad Bandwidth

Laser &Photonics Reviews, EarlyView.
In article xxxxx, Alex M. H. Wong and co‐authors propose a multifunctional full‐space metalens supporting power‐efficient, broadband operation for four spin‐controlled output channels. The metalens separates an incoming wave into four equi‐power, spin‐decoupled and function‐decoupled waves (two transmitted and two reflected).
Xiaoluo He, Bowen Ren, Ka Fai Chan, Alex M. H. Wong   +3 more
wiley   +1 more source

All-dielectric coding metasurface designs for spin-selective beam shaping and multichannel optical vortex beam manipulation

Results in Physics
Enhancing the information-carrying capacity of incident light using multifunctional metasurfaces have attracted considerable interests due to its promising applications in high-secure information encryption and communication. Incorporating spin-dependent
Naeem Ullah, Ata Ur Rahman Khalid, Shahid Iqbal, Muhammad Imran, Muhammad Ismail Khan, Vijay Laxmi, Yibin Tian, Xiaoqing Tian   +7 more
doaj  

Reflections on the Spatial Exponential Growth of Electromagnetic Quasinormal Modes

Laser &Photonics Reviews, EarlyView.
Quasinormal modes (QNMs) offer a robust framework for understanding the physics of resonators. However, conceptual challenges arise in regions distant from resonators, where QNM fields exponentially grow. This growth is not unphysical, but gives rise to counterintuitive effects, which is explained by examining fundamentals of non‐Hermitian systems ...
Tong Wu, José Luis Jaramillo, Philippe Lalanne   +2 more
wiley   +1 more source