Results 151 to 160 of about 4,697 (265)

Stimuli‐Responsive Hydrogels for Optical Applications: Mechanisms, Architectures, and Translational Challenges

Aggregate, Volume 7, Issue 6, June 2026.
The review discusses stimuli‐responsive hydrogels as soft optical materials that translate physical, chemical, and biological cues into refractive‐index, scattering, birefringence, diffraction, and transparency changes. It examines major stimulus classes and photonic architectures for biosensing, waveguiding, adaptive lenses, smart windows, and therapy.
Andrés Bernal‐Ballén, Alexandr Dejneka, Oleg Lunov   +2 more
wiley   +1 more source

Holographic Optical Elements as Scanning Lidar Telescopes

, 2005
We have developed and investigated the use of holographic optical elements (HOEs) and holographic transmission gratings for scanning lidar telescopes. For example, rotating a flat HOE in its own plane with the focal spot on the rotation axis makes a very
Guerra, David V., Schwemmer, Geary K., Rallison, Richard D., Wilkerson, Thomas D.   +3 more
core  

Advancing Machine Learning Optimization of Chiral Photonic Metasurface: Comparative Study of Neural Network and Genetic Algorithm Approaches

Advanced Physics Research, Volume 5, Issue 6, June 2026.
Two methods for the optimization of chiral reflection by a metamaterial made of either GaP/Air or PMMA/Air interfaces are compared, showing approaches towards fast design exploration and high‐performance results: a neural‐network pipeline and a genetic algorithm. The structures considered are characterized by a periodic, chiral texturation with a shape
Davide Filippozzi, Alexandre Mayer, Nicolas Roy, Wei Fang, Arash Rahimi‐Iman   +4 more
wiley   +1 more source

Holographic Projection Display Enlargement via Polarization-Grating Beam Steering with Fast-Response Liquid Crystal Pi-Cells. [PDF]

ACS Photonics
Han Q, Wang T, Zhang G, Kamal W, Guo J, Zhao Z, He C, Elston SJ, Morris SM.   +8 more
europepmc   +1 more source

Using Principal Components Analysis to Visualize Motion and Mitigate Artifacts in Dynamic Optical Coherence Tomography

Journal of Biophotonics, Volume 19, Issue 6, June 2026.
We demonstrate that Principal Component Analysis (PCA) can be used in dynamic OCT to substantially reduce artifacts from strong specular reflections, isolate movement within the sample, and create thin, histology‐like images, thereby avoiding the need for complex, time‐consuming techniques used in clinical histopathology.
Alejandro Martínez Jiménez, Adrian Bradu   +1 more
wiley   +1 more source

Methods and Strategies for Enhancing the Performance of PQ/PMMA Photopolymers for Holographic Data Storage. [PDF]

Polymers (Basel)
Wu J, Peng L, Wu H, Xiong R, Huang J, Wu E, Tan X.   +6 more
europepmc   +1 more source

Ponderomotive plasma lenses for holography by Gaussian beams. [PDF]

Sci Rep
Alilou S, Shahrassai L, Sobhanian S.
europepmc   +1 more source

Reconfigurable Nanogap SERS for Multiscale Molecular Sensing on Curved Surfaces

Small, Volume 22, Issue 35, 23 June 2026.
Reconfigurable Au‐coated SMP nanocomposites enable adaptive SERS through reversible tuning of Au─Au nanogaps. Embedded AgNPs serve as photothermal triggers and reinforcements. Wide gaps facilitate macromolecule detection, while narrowed gaps enhance small‐molecule signals for reliable multiscale sensing on curved surfaces.
Goum Min, Jinsoo Na, Yugyeong Kang, Siheon Lee, Byounghyun Jeon, Hanjae Kim, Hyunjun Lee, Beomsoo Chun, Soojeong Yim, Jeonghun Kwak, Youngho Eom, Chang Yeol Lee, Soon Hyoung Hwang, Juhyuk Park   +13 more
wiley   +1 more source

Electrically switchable continuous phase liquid crystal Fresnel zone plate. [PDF]

Light Sci Appl
Xu Z, Nourshargh C, Wang T, Xu A, Spiller N, Mur U, Booth MJ, Elston SJ, Morris SM.   +8 more
europepmc   +1 more source

Alternative techniques for the production and manipulation of ultracold atoms

, 2012
This Thesis contains details of the construction and characterisation of a compact apparatus for the cooling of ultracold atoms to quantum degeneracy, and their manipulation in flexible holographic optical traps. We have designed and built two iterations
Bruce, Graham D.
core