Results 91 to 100 of about 2,677,605 (251)

Control and measurement of ultrafast pulses for pump/probe-based metrology [PDF]

, 2008
In this thesis the control of ultrafast (10⁻¹³ s) optical pulses used for metrological applications has been investigated. Two different measurement set-ups have been considered, both based around the `pump-probe' technique, where an optical pulse is ...
Harper, Matthew R.
core   +2 more sources

Nonlinear Photonics for Sub-Terahertz Sources [PDF]

EPJ Web of Conferences
Terahertz technologies offer unique advantages for communication, sensing, and imaging, yet integrated platforms struggle to perform efficiently in this range. Thin-film lithium niobate, a nonlinear photonic platform, enables compact, broadband, and high-
Rajabali Shima, Zhu Xinrui, Warner Hana K., Song Yunxiang, Magalhaes Leticia, Shams Ansari Amirhassan, Lončar Marko   +6 more
doaj   +1 more source

Experimental Comparison of UTC- and PIN-Photodiodes for Continuous-Wave Terahertz Generation

, 2022
S.343-354We carried out an experimental comparison study of the two most established optoelectronic emitters for continuous-wave (cw) terahertz generation: a uni-traveling-carrier photodiode (UTC-PD) and a pin-photodiode (PIN-PD).
Deninger, A., Nellen, S., Globisch, B., Schell, M., Kohlhaas, R.B., Liebermeister, L., Ishibashi, T.   +6 more
core   +1 more source

Efficient Polarization‐Entangled Photon‐Pair Generation by a Fiber‐In‐Line van der Waals Material

Advanced Science, EarlyView.
Telecom‐wavelength polarization‐entangled photon pairs are generated in a van der Waals‐material‐integrated all‐fiber device via spontaneous parametric down‐conversion. The demonstrated fiberized quantum light source bridges emerging 2D nonlinear materials and practical quantum photonic systems, opening new opportunities for scalable fiber‐based ...
Jungseok Choi, Seongju Ha, Seungjae Lim, Joohyeon Ahn, Jaekyoung Kim, Jong Hyuk Yim, Nam Hun Park, Youngdong Yoo, Jae‐Ung Lee, Hee Su Park, Sang Min Lee, Dong‐Il Yeom   +11 more
wiley   +1 more source

Measurements of the time-jitter of coherent terahertz synchrotron radiation with a superconducting detector [PDF]

, 2012
We have applied an ultrafast superconducting YBa2Cu3O7-δ (YBCO) detector to study the time jitter of the propagating electron bunches in a synchrotron. The jitter was determined from the coherent terahertz (THz) synchrotron radiation (CSR)
Hoehl, Arne, Pohl, Andreas, Ulm, Gerhard, Müller, Ralph, Feikes, Jörg, Hofherr, Matthias, Semenov, Alexej, Wüstefeld, Godehard, Hübers, Heinz-Wilhelm, Scheuring, Alexander, Probst, Petra, Ilin, Konstantin, Ries, Markus, Wünsch, Stefan   +13 more
core  

Integrated disk resonator on substrateless dielectric waveguide platform for terahertz switch applications

, 2022
We present a terahertz single-pole double-throw (SPDT) switch based on an integrated disk resonator for a substrateless dielectric platform made of an all-silicon-based effective medium. The switch operates based on photoexcitation by using visible light
Fumeaux, C., Dechwechprasit, P., Withayachumnankul, W.   +2 more
core   +1 more source

Pattern‐Aware Intelligence Enables Nondestructive, Rapid Quantification of High‐Aspect‐Ratio Silicon Etching

Advanced Science, EarlyView.
Pattern‐dependent etching is converted into a physical prior for intelligent reconstruction of high‐aspect‐ratio silicon structures. Combining YOLO‐Pose feature extraction with a topography network, the framework retrieves depth, sidewall angle, and scallop texture from minimal destructive observations, enabling accurate cross‐scale metrology and near ...
Shuyan He, Lang Chen, Bo Wen, Yufeng Jin, Wei Wang   +4 more
wiley   +1 more source

High-energy coherent terahertz radiation emitted by wide-angle electron beams from a laser-wakefield accelerator

New Journal of Physics, 2018
High-charge electron beams produced by laser-wakefield accelerators are potentially novel, scalable sources of high-power terahertz radiation suitable for applications requiring high-intensity fields.
Xue Yang, Enrico Brunetti, Dino A Jaroszynski   +2 more
doaj   +1 more source

Design and implementation of terahertz reflectarray

, 2012
Extent: 2p.In this work, a reflectarray operating at 1 THz is designed and implemented using metal-dielectric resonant patch elements. The dimensions of the single elements are optimized through simulation to achieve a wide range of the reflection phase ...
Tiaoming Niu, Sriram, S., Christophe Fumeaux, Ung, B., Madhu Bhaskaran, Withayachumnankul, W., Niu, T., Meneske, H., Benjamin Ung, Bhaskaran, M., Hakan Menekse, Sharath Sriram, Fumeaux, C., Withawat Withayachumnankul   +13 more
core   +1 more source

Terahertz‐Nanoscale Visualization of the Microscopic Spin‐Charge Architecture of Colossal Magnetoresistive Switching

Advanced Science, EarlyView.
This study employs cryogenic magneto‐terahertz nanoscopy to reveal the real‐space electrodynamics of the colossal magnetoresistance transition. By capturing the terahertz electrodynamic evolution of field‐driven spin switching, the work unveils the dissipative dynamics of emergent metallic states, providing a high‐frequency view of coupled spin‐charge ...
Samuel Haeuser, Randall K. Chan, Richard H. J. Kim, Joong‐Mok Park, Martin Mootz, Thomas Koschny, Jigang Wang   +6 more
wiley   +1 more source