Results 71 to 80 of about 275,542 (299)

Improvement of an InfraRed Pyroelectric Detector Performances in THz Range Using the Terajet Effect

Applied Sciences, 2021
An infrared (IR) pyroelectric detector was investigated for terahertz (THz) detection using the principle of the terajet effect, which focuses the beam beyond the diffraction limit.
Oleg V. Minin, Jaime Calvo-Gallego, Yahya M. Meziani, Igor V. Minin   +3 more
doaj   +1 more source

Terahertz Rectifyier for Integrated Image Detector

Procedia Engineering, 2015
AbstractWe present a new CMOS compatible direct conversion terahertz detector operating at room temperature. The rectenna consists in a truncated conical helix extruded from a planar spiral and connected to a nanometric metallic whisker at one of its edges. The whisker reaches the semiconductor substrate that constitutes the antenna ground plane.
VARLAMAVA, VOLHA, De Amicis, Giovanni, Del Monte, Andrea, PERTICAROLI, STEFANO, RAO, ROSARIO, PALMA, Fabrizio   +5 more
openaire   +1 more source

Controlling Radiative Phonons in the van der Waals Ferroelectric NbOI2

Advanced Materials, EarlyView.
Using a simple mirror geometry, this work demonstrates local‐density‐of‐optical‐states control of THz phonon emission in van der Waals ferroelectric NbOI2. By engineering the photonic environment, the phonon Q‐factor, linewidth, peak frequency, and emission intensity are reversibly tuned by over an order of magnitude, revealing radiative phonons as ...
Baolong Zhang, Ruihuan Duan, Sobhan Subhra Mishra, Thomas Tan Caiwei, Zheng Liu, Ranjan Singh   +5 more
wiley   +1 more source

A Review of Thermal Detectors of THz Radiation Operated at Room Temperature

Sensors
This article concerns optical detection issues in the terahertz (THz) range. This is a kind of guide to various types of uncooled thermal detectors in the most often applications.
Zbigniew Bielecki, Janusz Mikolajczyk, Jacek Wojtas   +2 more
doaj   +1 more source

High-TC Superconducting Kinetic Inductance Detectors for Terahertz Imaging

, 2019
Kinetic Inductance Detectors made of High-TC superconductor YBCO are designed and fabricated, in view as possible application as high sensitivity, low cost and high-manageability terahertz camera for ...
Alfonso A. Tanga, Cruciani A., Ortolani M., Maria Gabriella Castellano, Pettinari G., Marco Vignati, Michele Ortolani, Benfatto L., Castellano M. G., Leonetta Baldassarre, Lorenzana Jose', Messina Gabriele, Angelo Cruciani, Gabriele C. Messina, Jose Lorenzana, Lara Benfatto, Vignati M., Valentina Brosco, Brosco V., Baldassarre L., Giorgio Pettinari, Tanga A. A., Sara Cibella, Cibella S.   +23 more
core   +1 more source

Above Room Temperature Ferroelectricity in Epitaxially Strained KTaO3

Advanced Materials, EarlyView.
Through precise epitaxial engineering, the cubic and paraelectric KTaO3${\rm KTaO}_3$ is transformed into a robust ferroelectric. By leveraging lattice‐mismatched substrates to apply controlled epitaxial strain, a stable ferroelectric ground‐state is achieved with a transition temperature as high as 475 K, establishing KTaO3${\rm KTaO}_3$ as a highly ...
Tobias Schwaigert, Salva Salmani‐Rezaie, Sankalpa Hazra, Utkarsh Saha, Maya Ramesh, Aiden Ross, Betül Pamuk, Long‐Qing Chen, David A. Muller, Darrell G. Schlom, Venkatraman Gopalan, Kaveh Ahadi   +11 more
wiley   +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

The research progress and application of novel terahertz detectors [PDF]

, 2020
Terahertz waves have many unique electrical and optical properties, which have significant applications in both civil and military fields, such as physics, biology, public safety inspection, local area communication, information security, environmental ...
Vincent Teng
core   +1 more source

Cascading Spin‐Orbitronic Terahertz Emission in Ferromagnet/Nonmagnet Bilayers

Advanced Optical Materials, EarlyView.
While the initial generation mechanism of picosecond orbital currents remains elusive, we reveal a cascading spin–orbital transport mechanism that induces optically driven terahertz emission in ferromagnet/nonmagnet heterostructures. Using a ferromagnet with strong spin–orbit coupling, we identify a thickness‐driven transition from spin‐dominated to ...
Younghun Kim, Pinki Yadav, Byungwoo Son, Jooyoung Heo, Sejin Shin, Do‐Kyeong Ko, Rahul Mishra, Kyusup Lee   +7 more
wiley   +1 more source

Programmable Anisotropic Terahertz Permittivity via High‐Aspect‐Ratio 3D‐Printed Dielectric Mesh Networks

Advanced Optical Materials, EarlyView.
A 3D‐printed Terahertz (THz) anisotropic dielectric with programmable permittivity by varying infill density and creating high‐aspect‐ratio channels is presented. The proposed design was evaluated both experimentally, through THz time‐domain spectroscopy, and theoretically, through FDTD simulations and Effective Medium Theory analysis.
Chi Him Liu, Hwan Sik Kim, Andre Sarker Andy, Imad A.M. Ahmed, Yeong Hwan Ahn, Sang‐Soo Chee, Mira Naftaly, John E. Cunningham, Sae June Park   +8 more
wiley   +1 more source