Results 61 to 70 of about 2,235,211 (295)

Photonic crystal waveguides in chalcogenide glasses [PDF]

, 2011
The growing speed and bandwidth requirements of telecommunication systems demand all-optical on-chip solutions. Microphotonic devices can deliver low power nonlinear signal processing solutions. This thesis looks at the slow light photonic crystals in
Spurny, Marcel
core   +2 more sources

Parity‐Dependent THz Harmonic Generation in Electrically Pumped Micro‐Lasers Exploiting Topological Insulator–Metamaterial Gratings

Advanced Materials, EarlyView.
Topological insulator–metamaterials integrated with electrically driven terahertz quantum cascade lasers enable parity‐dependent harmonic generation. Bulk‐dominated Bi2Se3 favors third‐harmonic emission at 9.96 THz, whereas topological‐surface‐state‐dominated Bi2Se3, Bi2Te3, and (Bi,Sb)2Te3 generate strong second harmonics near 6.5 THz.
Alessandra Di Gaspare, Craig S. Knox, Ahmet Yagmur, Sara Ghayeb Zamharir, Lianhe Li, Satoshi Sasaki, A. Giles Davies, Edmund H. Linfield, Joshua R. Freeman, Miriam S. Vitiello   +9 more
wiley   +1 more source

Generation of phonons from electrostriction in small-core optical waveguides

AIP Advances, 2013
We investigate the generation of acoustic phonons from electrostriction of optical waves in small core waveguides. We specifically consider simple step-index strip waveguides composed of silica or silicon in air, with sub-micron lateral dimensions.
Vincent Laude, Jean-Charles Beugnot
doaj   +1 more source

High-index contrast waveguides for microparticle guidance

, 2008
Design, fabrication and optimization of high refractive-index contrast Tantalum Pentoxide (Ta2O5) nanoscale waveguides are reported. The strong evanescent field in such nanoscale (150nm-250nm thick) and high-refractive index contrast (Delta.n ~ 0.65 ...
Ahluwalia, B.S., Hellesø, O.G., Subramanian, A.Z., Wilkinson, J.S.   +3 more
core   +1 more source

Understanding the rich physics of light propagation in slow photonic crystal waveguides [PDF]

, 2010
Selected papers. Held as part of SPIE Photonics West 2010.We study propagation losses in slow light photonic crystal waveguides and show that dispersion engineering can reduce the loss.
Lalanne, Phillippe, De La Rue, Richard, Beggs, Daryl M., M. Sorel, MELLONI, ANDREA IVANO, Thomas F. Krauss, Francesco Morichetti, Schulz, Sebastian, Beggs, Daryl Matthew, Sebastian Schulz, Marc Sorel, Samarelli, Antonio, Liam O'Faolain, Krauss, Thomas F., Daryl M. Beggs, Sorel, Marc, Simon Mazoyer, L. O'Faolain, Morichetti, Francesco, D. M. Beggs, S. Schulz, Canciamilla, Antonio, A. Samarelli, TORREGIANI, MATTEO ALDO, O'Faolain, Liam, Antonio Samarelli, Andrea Melloni, Torregiani, M., Richard De La Rue, Phillippe Lalanne, Melloni, Andrea, Antonio Canciamilla, T. F. Krauss, Mazoyer, Simon, R. De La Rue, M. Torregiani   +35 more
core   +1 more source

Recent Advances in Plasma‐Enhanced Atomic Layer Etching for Next‐Generation Nanofabrication

Advanced Materials Interfaces, EarlyView.
Continued semiconductor miniaturization demands atomic‐scale patterning and ultralow surface roughness beyond the capabilities of conventional reactive ion etching. This review highlights advances in isotropic and anisotropic plasma‐enhanced atomic layer etching since 2020, covering fundamental mechanisms, applications across major semiconductor ...
Shih‐Nan Hsiao
wiley   +1 more source

Type I phase matching in thin film of lithium niobate on insulator

Results in Physics, 2020
Thin film of lithium niobate on insulator (LNOI) enables functional devices with compact sectional area and footprint, exhibiting high nonlinear optical conversion efficiencies and high performance electro-optical modulating.
Lei Wang, Ling-Qi Li, Xin-Tong Zhang, Feng Chen   +3 more
doaj   +1 more source

Advances in Halide Perovskites for Photon Radiation Detectors

Advanced Materials Technologies, EarlyView.
This work highlights recent progress in perovskite‐based photon radiation detectors, covering organic–inorganic hybrid, inorganic, lead‐free double, and vacancy‐ordered halide perovskites. Their detection performance is compared, material‐specific advantages and challenges are examined, and provides insight into current limitations and future ...
Liangling Wang, Jieqi Wang, Xiaojun Cui, Carsten Ronning   +3 more
wiley   +1 more source

Precision dicing of optical materials [PDF]

, 2014
Ductile regime dicing has been used to machine a variety of optical materials to produce waveguides for lasers, multi-mode interference devices and non-linear devices.
Smith, P.G.R., Carpenter, Lewis, Cooper, P.A., J. C. Gates, P. A. Cooper, Holmes, C., C. Holmes, Gates, J.C., L. G. Carpenter, P. G. R. Smith   +9 more
core   +1 more source

Wood‐Derived Nanocellulose‐Biocarbon Fresnel‐Zone Plate Lenses for Sub‐THz Frequency Applications

Advanced Materials Technologies, EarlyView.
Wood‐derived nanocellulose and lignin‐based biocarbon were combined to fabricate fully bio‐based Fresnel zone plate (FZP) lenses for sub‐terahertz frequencies. These sustainable FZP lenses exhibit low dielectric loss and high directivity, achieving performance comparable to that of metallic references, and remain functional under environmental stress ...
Riikka Haataja, Mikko Kokkonen, Niina Halonen, Sami Myllymäki, Umair Rafique, Mandeep Singh, Ossi Laitinen, Heli Jantunen, Kristiina Oksman, Henrikki Liimatainen   +9 more
wiley   +1 more source