Results 101 to 110 of about 12,678 (263)

Dispersive Full‐Channel Jones Matrix Modulation in Elliptical Polarization Bases via a Single‐Layered Metasurface

Advanced Science, EarlyView.
This work presents a dispersive full‐channel Jones matrix modulation strategy using single‐layer metasurface. By synergizing wavelength dispersion engineering with elliptical polarization bases, independent control of four Jones matrix channels is achieved across multiple wavelengths.
Hairong He, Guangtao Cao, Shuhao Zhang, Hui Xu, Zhiquan Chen, Meiyu Peng, Yuting Jiang, Yueqiang Hu, Hui Jing, Huigao Duan, Hui Yang   +10 more
wiley   +1 more source

Arbitrary shape surface Fresnel diffraction

, 2012
Fresnel diffraction calculation on an arbitrary shape surface is proposed. This method is capable of calculating Fresnel diffraction from a source surface with an arbitrary shape to a planar destination surface.
Ahrenberg, Delen, Dutt, Esmer, Frere, Greengard, Leseberg, Liu, Liu, Matsushima, Nobuyuki Masuda, Sakata, Tommasi, Tomoyoshi Ito, Tomoyoshi Shimobaba, Yu   +15 more
core   +1 more source

XOR‐Logic Phase Coding Programmable Metasurface for Low Power‐Consumption Systems

Advanced Science, EarlyView.
By leveraging XOR logic, the biasing‐network complexity of 2D programmable metasurfaces is reduced from m×n to m+n through efficient row‐column control. This enables versatile functions including beam deflection and beamforming, facilitating applications in wireless communications and beyond.
Ruichao Zhu, Sai Sui, Junyan Dai, Qunyan Zhou, Yuxiang Jia, Yajuan Han, Yuxi Li, Shaojie Wang, Qiang Cheng, Jiafu Wang, Tie Jun Cui   +10 more
wiley   +1 more source

Entanglement of Orbital Angular Momentum States of Photons

, 2002
So far experimental confirmation of entanglement has been restricted to qubits, i.e. two-state quantum systems including recent realization of three- and four-qubit entanglements. Yet, an ever increasing body of theoretical work calls for entanglement in
Mair, Alois, Vaziri, Alipasha, Weihs, Gregor, Zeilinger, Anton   +3 more
core   +1 more source

Tunable Sound Absorption via Evanescent‐Wave Coupling in Asymmetric Bilayer Metasurfaces

Advanced Science, EarlyView.
Tunable sound absorption is realized through a bilayer metasurface system governed by evanescent‐wave coupling. This work demonstrates that such evanescent‐wave coupling provides a controllable scattering channel that destructively interferes with the specular reflection.
Pyung Sik Ma, Hyung Jin Lee
wiley   +1 more source

Computer generated volume holograms fabricated on a coreless fiber tip by two photon polymerization [PDF]

EPJ Web of Conferences
Computer-generated volume holograms (CGVHs) contain 3D refractive index modulations designed to create complex-shaped wave fields for various optical applications.
Jalili Mansoureh, Thiemicke Fabian, Falldorf Claas, Bergmann Ralf B.   +3 more
doaj   +1 more source

Detection of Bessel beams with digital axicons

, 2014
We propose a simple method for the detection of Bessel beams with arbitrary radial and azimuthal indices, and then demonstrate it in an all-digital setup with a spatial light modulator.
Forbes, Andrew, Ismail, Yaseera, McLaren, Melanie, Mhlanga, Thandeka, Roux, Filippus, Trichili, Abderrahmen, Zghal, Mourad   +6 more
core   +1 more source

In‐Operando 4D‐STEM and STEM‐EBIC Imaging of Electric Fields and Charge Carrier Behavior in Biased Silicon p–n Junctions

Advanced Electronic Materials, EarlyView.
This work presents a study of how 4D‐STEM centre of mass measurements and STEM‐EBIC can be used to map the positions, directions, and strengths of electric fields in semiconductor devices. The contrast mechanisms of both techniques are tested and compared with simulations to build a robust analysis of an in situ device in the electron microscope ...
Eoin Moynihan, Yining Xie, David Cooper, Grigore Moldovan, Richard Beanland, Ana Sanchez   +5 more
wiley   +1 more source

Representation and matching of knowledge to design digital systems [PDF]

, 1988
A knowledge-based expert system is described that provides an approach to solve a problem requiring an expert with considerable domain expertise and facts about available digital hardware building blocks.
Jones, J. U., Shiva, S. G.
core   +1 more source

Experimental Quantum Cryptography with Qutrits

, 2005
We produce two identical keys using, for the first time, entangled trinary quantum systems (qutrits) for quantum key distribution. The advantage of qutrits over the normally used binary quantum systems is an increased coding density and a higher security
Alipasha Vaziri, Anton Zeilinger, Bazhenov V Y, Bennett C H, Bennett C H Brassard G, Chen Z-B Zhang Q Bao X-H Schmiedmayer J Pan J-W, Gregor Weihs, Simon Gröblacher, Stucki D, Takesue H, Thomas Jennewein, Torres J P, Vaziri A   +12 more
core   +1 more source