Results 101 to 110 of about 287,449 (377)

Estimation of Permittivity of Films Using the Free-Space Measurement Method at Ka-Band

IEEE Access
This work introduces a refined technique for the estimation of films permittivity within the Ka-band using free-space measurement method. Addressing the challenge of wrong solutions in permittivity estimation, our approach incorporates a frequency ...
Daeyeong Yoon, Jihyung Kim, Dong-Yeop Na, Yong Bae Park   +3 more
doaj   +1 more source

Collagen Analysis at Terahertz Band Using Double-Debye Parameter Extraction and Particle Swarm Optimisation

IEEE Access, 2017
This paper focuses on the analysis of cultivated collagen samples at the terahertz (THz) band using double debye model parameter extraction. Based on measured electrical and optical parameters, we propose a model to describe such parameters extracted ...
Ke Yang, Nishtha Chopra, Qammer H. Abbasi, Khalid A. Qaraqe, Akram Alomainy   +4 more
doaj   +1 more source

Reconfigurable Metamirrors Based on Compliant Mechanisms

Advanced Functional Materials, EarlyView.
Providing the basis for numerous practical applications, the reconfigurability of metadevices is of great importance. Through the integration of controlled mechanical deformation with chiral meta‐atoms, a compliant mechanism based metamirror is demonstrated for active control over the polarization of electromagnetic waves.
Galestan Mackertich‐Sengerdy, Lei Kang, Sawyer D. Campbell, Douglas H. Werner   +3 more
wiley   +1 more source

Surface FGM Insulator Based on BaTiO₃ Magnetron Sputtering for Electric Field Grading of AC Gas Insulated Power Apparatus

IEEE Access, 2019
Electric field optimization is a critical technique to ensure the compact structure and reliable operation for AC gas insulated power apparatus. To obtain a more uniform electric field distribution, this paper proposes the concept of the d-SFGM insulator,
Boxue Du, Zehua Wang, Jin Li, Mi Xiao, Hucheng Liang   +4 more
doaj   +1 more source

Complementary Logic Driven by Dielectrophoretic Assembly of 2D Semiconductors

Advanced Functional Materials, EarlyView.
Scalable, parallel fabrication of complementary logic gates is demonstrated using electric‐field‐driven deterministic assembly of electrochemically exfoliated 2D n‐type MoS2 and p‐type WSe2 nanosheets. This strategy yields MoS2 and WSe2 transistors featuring average mobilities of 4.3 and 3.0 cm2 V−1 s−1, respectively, and on/off ratios of > 104 ...
Dongjoon Rhee, Okin Song, Ji Yun Park, Yonghyun Albert Kwon, Jae Hyung Kim, In Soo Kim, Zdeněk Sofer, Jeong Ho Cho, Deep Jariwala, Hyesung Park, Joohoon Kang   +10 more
wiley   +1 more source

Interfacial Control of Degradation Pathways in 2D Heterostructures

Advanced Functional Materials, EarlyView.
The stability of two‐dimensional (2D) heterostructures is governed not only by their intrinsic chemistry but also by interfacial effects. This study reveals how metallic versus insulating substrates impact the oxidation of air‐sensitive 2H‐MoTe2. Metallic layers act as charge reservoirs, mitigating degradation, while insulating ones accelerate it ...
Yeoseon Sim, Se‐Yang Kim, Soon‐Dong Park, Hyeonwoo Lee, Junghwa Kim, Sora Jang, Jaewon Wang, Seunguk Song, Jinsung Kwak, Zonghoon Lee, Changwook Jeong, Sung Youb Kim, Soon‐Yong Kwon   +12 more
wiley   +1 more source

Gain assisted harmonic generation in near-zero permittivity metamaterials made of plasmonic nanoshells

, 2012
We investigate enhanced harmonic generation processes in gain-assisted, near-zero permittivity metamaterials composed of spherical plasmonic nanoshells. We report the presence of narrow-band features in transmission, reflection and absorption induced by ...
Campione, Salvatore, Capolino, Filippo, de Ceglia, Domenico, Scalora, Michael, Vincenti, Maria Antonietta   +4 more
core   +1 more source

Near‐Sensor Analog Computing via Monolithic 3D Piezoelectric Sensor–FeFET for Tactile Sensing System

Advanced Functional Materials, EarlyView.
A monolithic 3D‐integrated tactile system combines a piezoelectric sensor and ferroelectric field‐effect transistor (FeFET) to process both static and dynamic pressure signals directly at the sensor node. The system enables in‐sensor analog noise filtering with multi‐level memory states, achieving high sensitivity and ultra‐low power operation (≈10 nW),
Woongjin Kim, Seungyeob Kim, Jinwook Ha, Taeseung Jung, Yunjeong Kim, Jinho Ahn, Sanghun Jeon   +6 more
wiley   +1 more source

Kramers-Kronig Relations For The Dielectric Function And The Static Conductivity Of Coulomb Systems

, 2010
The mutual influence of singularities of the dielectric permittivity e(q,w) in a Coulomb system in two limiting cases w tends to zero, q tends to zero, and opposite q tends to zero, w tends to zero is established.
Abrikosov A. A., Alekseev V. A., Balescu R., Bobrov V. B., Bobrov V. B. Trigger S. A., G. J. F. van Heijst, Kraeft W.-D., Landau L. D., P. P. J. M. Schram, Pines D., Resibois P., S. A. Trigger, Silin V. P., V. B. Bobrov   +13 more
core   +1 more source

Optimization techniques for permittivity and permeability determination

Journal of Research of the National Institute of Standards and Technology, 1991
This paper discusses optimization techniques for the determination of complex permittivity and permeability in transmission lines. The traditional theoretical model using scattering parameters is extended into a mathematical regression model that can be solved with widely accepted numerical techniques.
Domich, Paul D., Baker-Jarvis, James, Geyer, Richard G.   +2 more
openaire   +2 more sources