Results 41 to 50 of about 27,513 (349)

Invisible Polymer Walls Enhance Reorientational Optical Nonlinearity in Oligothiophene‐Doped Liquid Crystals

Advanced Functional Materials, EarlyView.
The polymer wall stabilized dye‐doped liquid crystals (PWLCs) enhance the sensitivity of photoinduced molecular reorientation in dye‐doped LC systems. The PWLC with an invisible polymer wall successfully reduces the threshold intensity and functions as an optical limiter under the incidence of low intensity light laser source.
Junki Yokota, Yuya Nakata, Erika Katayama, Miho Aizawa, Kyohei Hisano, Shoichi Kubo, Atsushi Shishido   +6 more
wiley   +1 more source

Interferometric Metrology Using Reprogrammable Binary Holograms [PDF]

, 2013
Interferometric methods for surface metrology have been widely used for many years due to their speed, accuracy and versatility. It is frequently necessary however to produce a known comparison reference surface to minimise the optical path difference ...
CASHMORE, MATTHEW,THOMAS,DOLPHIN
core  

Asymmetric Transmission and Wavefront Manipulation toward Dual-Frequency Meta-Holograms

, 2019
Amplitude, phase, and polarization are three fundamental properties of electromagnetic (EM) waves, while the simultaneous control by conventional materials are usually associated with heavy and bulky designs.
Xiangang Luo (3222276), Zuojun Zhang (6239531), Xiong Li (112522), Zuojun Zhang, Yijia Huang, Xiangang Luo, Mingbo Pu (3222279), Yijia Huang (6255578), Yinghui Guo (88914), Qirui Sun (6792047), Xiaoliang Ma, Mingbo Pu, Xiong Li, Yinghui Guo, Qirui Sun, Xiaoliang Ma (689524)   +15 more
core   +1 more source

Localized Temperature Monitoring in Mouse Brain during Light Delivery via a Non‐Planar Tapered Fiber‐Integrated µRTD Sensor

Advanced Materials, EarlyView.
We report a multifunctional tapered optical fiber integrating a conformal micro‐resistance temperature detector (µRTD) for local, real‐time thermometry during optical stimulation. The platform combines light‐delivery and temperature sensing within a minimally invasive footprint, enabling detection of sub‐degree cortical heating under representative ...
Antonio Balena, Marco Bianco, Barbara Spagnolo, Muhammad Fayyaz Kashif, Alberto Bramati, Massimo De Vittorio, Ferruccio Pisanello   +6 more
wiley   +1 more source

All‐Optical Reconfigurable Physical Unclonable Function for Sustainable Security

Advanced Materials, EarlyView.
An all‐optical reconfigurable physical unclonable function (PUF) is demonstrated using plasmonic coupling–induced sintering of optically trapped gold nanoparticles, where Brownian motion serves as a robust entropy source. The resulting optical PUF exhibits high encoding density, strong resistance to modeling attacks, and practical authentication ...
Jang‐Kyun Kwak, Changgyun Moon, Hyun‐Bin Yu, Sunkook Kim, Dong‐Hwan Kim   +4 more
wiley   +1 more source

Use of Computer-Generated Holograms in Security Hologram Applications [PDF]

Latvian Journal of Physics and Technical Sciences, 2016
Abstract The article discusses the use of computer-generated holograms (CGHs) for the application as one of the security features in the relief-phase protective holograms. An improved method of calculating CGHs is presented, based on ray-tracing approach in the case of interference of parallel rays.
Bulanovs, A., Bakanas, Ramūnas, Institute of Physical Energetics   +2 more
openaire   +2 more sources

Grid computing for the numerical reconstruction of digital holograms

, 2005
Digital holography has the potential to greatly extend holography's applications and move it from the lab into the field: a single CCD or other solid-state sensor can capture any number of holograms while numerical reconstruction within a computer ...
Nebrensky, JJ, Fryer, PC, P. R. Hobson, J. J. Nebrensky, P. C. Fryer, Hobson, PR   +5 more
core   +1 more source

Deep Learning Inverse Design of Phase‐Change Reconfigurable Terahertz Metadevices for Multidimensional Secure Communication

Advanced Materials, EarlyView.
A deep learning inverse‐design framework is established to create versatile reconfigurable terahertz metadevices. By synergizing deep learning with phase‐change materials, this approach enables on‐demand customization of multidimensional electromagnetic responses.
Yisheng Dong, Xieyu Chen, Aarthy Nagarajan, Yi Yang, Zhihao Wang, Rui Yu, Chuang Zheng, Chunmei Ouyang, Xueqian Zhang, Tun Cao, Ranjan Singh, Zhen Tian   +11 more
wiley   +1 more source

THREE-DIMENSIONAL SIMULATION OF VOLUME PICTORIAL HOLOGRAM BY PHOTOGRAMMETRY METHOD [PDF]

Научно-технический вестник информационных технологий, механики и оптики, 2019
Subject of Research. The digitizing possibility for pictorial holograms is considered aimed at their storage and processing with the use of digital technologies.
Ekaterina V. Rabosh, Daniil A. Ankushin, Nikolay S. Balbekin, Yulia A. Vavilova, Anastasiya M. Timoshenkova, Ekaterina S. Avdonina, Tatiana V. Shlykova, Nikolay V. Petrov   +7 more
doaj   +1 more source

A holographic system for subsea recording and analysis of plankton and other marine particles (HOLOMAR)

, 2003
We report here details of the design, development, initial testing and field-deployment of the HOLOMAR system for in-situ subsea holography and analysis of marine plankton and nonliving particles.
Player, M.A., P.R. Hobson, V. Chalvidan, J. Watson, Chalvidan, V., Hobson, PR, Alexander, S, Hendry, DC, Chalvidan, V, Nareid, H., Tipping, K, K. Tipping, Lampitt, R.S., J.J. Nebrensky, Player, MA, Tipping, K., A. Pescetto, A. Diard, M.A. Player, Pieroni, GG, S. Serpico, Trucco, A., Watson, J, Trucco, A, R.S. Lampitt, Serpico, S., Nebrensky, JJ, Saw, K, S. Alexander, G.G. Pieroni, Watson, J., S. Gentili, Alexander, S., Diard, A, Hendry, D.C., Saw, K., Hobson, P.R., Foresti, GL, Lampitt, RS, Nareid, H, Craig, G., Nebrensky, J.J., D.C. Hendry, G. Craig, G.L. Foresti, Diard, A., Pescetto, A., Foresti, G.L., Craig, G, Pieroni, G.G., Serpico, S, H. Nareid, A. Trucco, Gentili, S., Gentili, S, Pescetto, A, K. Saw   +56 more
core   +1 more source