Results 231 to 240 of about 1,429,782 (326)

Intensity Noise Dynamics in Terahertz Quantum Cascade Lasers

Laser &Photonics Reviews, EarlyView.
Intensity‐noise dynamics in terahertz quantum cascade lasers are investigated across single‐mode, dense‐comb and harmonic‐comb regimes using graphene thermoelectric detectors. Harmonic combs show ∼10% lower relative intensity noise, while RIN scales as P0−γ$P_0^{ - \gamma }$ with γ≈1.2$\gamma \approx 1.2$, revealing a crossover from spontaneous ...
M. Alejandro Justo‐Guerrero, Leonardo Viti, Vladimir Pushkarev, Lianhe Li, Edmund H. Linfield, Miriam S. Vitiello   +5 more
wiley   +1 more source

Subsurface Fracture Mapping in Adhesive Interfaces Using Terahertz Spectroscopy. [PDF]

Materials (Basel)
Singh M, Karmarkar S, Herbsommer M, Yoon S, Tomar V.   +4 more
europepmc   +1 more source

From Planar to 3D Nanophotonic Lenses: Advancing Design, Fabrication, and Applications

Laser &Photonics Reviews, EarlyView.
Three‐dimensional nanophotonic lenses are enabled by an integrated workflow that links design parameterization, full‐wave electromagnetic simulation, computational optimization, and freeform fabrication. This Review summarizes how these tools expand optical design freedom beyond a single patterned plane by enriching the local meta‐atom response and ...
Wei Zhu, Lyudmila V. Goncharova, Eric Johlin   +2 more
wiley   +1 more source

A Joint Parallel Timing Recovery Loop with Low Complexity for Terahertz Communication System and Its FPGA Implementation. [PDF]

Sensors (Basel)
Wang F, Wang W, Xue L, Liu X, Zhou H.
europepmc   +1 more source

Contactless Detection of Giant Helicity‐Dependent Photovoltage in Chiral 2D Perovskites

Small, EarlyView.
A novel contactless probe—circularly polarized time‐resolved surface photovoltage spectroscopy is demonstrated to evaluate helicity‐dependent charge separation dynamics without the need for electrical contacts. Application of this novel methodology to chiral 2D perovskites reveals giant transient surface photovoltage anisotropy.
Joanna Dehnel, Ido Zemer, Rawan Hirzalla, Ido Hadar, Igal Levine   +4 more
wiley   +1 more source

Nondestructive determination of ash content in wheat flour via terahertz time-domain spectroscopy. [PDF]

Front Plant Sci
Wu X, Li G, Shen Y, Wu W, Li Z.
europepmc   +1 more source

Thermo‐Kinetic Design of Magnesiothermic Reduction for Morphology‐Retaining Porous Si@C Anodes

Small, EarlyView.
Balancing Mg‐vapor supply and surface consumption during magnesiothermic reduction suppresses particle aggregation and preserves monodisperse morphology in porous Si@C spheres. The resulting architecture improves transport uniformity and reduces degradation within the electrode, leading to more stable high‐capacity cycling than aggregated counterparts ...
Chaeheon Woo, Yeongjin Kim, Xue Dong, Byung Joo Jeong, Xiaojie Zhang, Hyeon‐Seok Bang, Kyung In Kim, Minjae Kim, Donghyeon Lee, Junyoung Mun, Hak Ki Yu, Jae‐Young Choi   +11 more
wiley   +1 more source

Pholidota-Inspired Electronic Skin Possessing Terahertz-Wave Reflection-Absorption-Transmission Switchability. [PDF]

Adv Sci (Weinh)
Li S, Hou J, Ruan Y, Du J, Qiu J.
europepmc   +1 more source

High‐performance electro‐optic materials featuring enhanced thermal stability through dual‐donor structural crosslinking engineering

Smart Molecules, EarlyView.
A groundbreaking dual‐donor crosslinking strategy was reported to significantly enhance the thermal stability, achieving remarkable EO coefficients (257–301 pm/V), glass transition temperatures (Tg) ranging from 107–187°C, and ultrahigh chromophore densities (3.73–4.26 × 10²⁰ molecules/cm³) with exceptional long‐term stability after 500 h at 85°C ...
Yu Zhang, Ziyun Zheng, Zhihan Huang, Zhifan Liu, Youling Chen, Fuyang Huo, Fenggang Liu, Xiubin Xu   +7 more
wiley   +1 more source

High-Performance Terahertz Photodetectors Based on Spiral Structure-Regulated Graphene. [PDF]

Sensors (Basel)
Yang L, Zhang B, Wei Y, Wu H, Zhou Z, Bao Z, Fan H, Wang X, Wang L, Chen X.   +9 more
europepmc   +1 more source