Results 211 to 220 of about 11,658 (306)

In Situ Acoustic Monitoring of Focused Femtosecond Pulse Duration in Air

Laser &Photonics Reviews, EarlyView.
Air‐breakdown acoustics at the laser focus is used to determine femtosecond pulse duration with a simple USB microphone. By chirp‐tuning and compressing 1030 nm pulses from 241 to 50 fs, the acoustic amplitude scales inversely proportional to the square root of the pulse duration, enabling in situ readout over 50 fs–5 ps—crucial for precise pulse ...
Indrė Meškėlaitė, Hsin‐Hui Huang, Haoran Mu, Nguyen Hoai An Le, Tomas Katkus, Edvinas Aleksandravičius, Gabrielius Kontenis, Domas Paipulas, Saulius Juodkazis, Darius Gailevičius   +9 more
wiley   +1 more source

Single-Shot Direct Transmission Terahertz Imaging Based on Intense Broadband Terahertz Radiation. [PDF]

Sensors (Basel)
Yue Z, Peng X, Li G, Zhou Y, Pu Y, Zhang Y.   +5 more
europepmc   +1 more source

Investigations on Practical Issues in Solid Immersion Lens Based Sub-Wavelength Terahertz Imaging Technique: System Stability Verification and Interference Pattern Removal. [PDF]

Sensors (Basel), 2021
Choi DH, Shin JH, Lee IM, Park KH.
europepmc   +1 more source

Optical‐to‐Microcomb Stability Transfer for Ultrastable Timing and Microwave/Millimeter‐Wave Generation

Laser &Photonics Reviews, EarlyView.
This work demonstrates a high‐fidelity stability transfer from an optical reference to a high‐repetition‐rate microcomb using a mode‐locked laser bridge. By employing electro‐optic sampling timing detection, femtosecond‐level synchronization and 10−18‐level fractional frequency stability are achieved.
Changmin Ahn, Junyong Choi, Daewon Suk, Hansuek Lee, Jungwon Kim   +4 more
wiley   +1 more source

Sub-Terahertz Imaging-Based Real-Time Non-Destructive Inspection System for Estimating Water Activity and Foreign Matter Depth in Seaweed. [PDF]

Sensors (Basel)
Kwak DH, Yun HW, Lee JH, Kim YD, Choi DH.   +4 more
europepmc   +1 more source

Terahertz Imaging and Spectroscopy in Cancer Diagnostics: A Technical Review. [PDF]

BME Front, 2020
Peng Y, Shi C, Wu X, Zhu Y, Zhuang S.
europepmc   +1 more source

Trace Identification and Visualization of Multiple Benzimidazole Pesticide Residues on Toona sinensis Leaves Using Terahertz Imaging Combined with Deep Learning. [PDF]

Int J Mol Sci, 2021
Nie P, Qu F, Lin L, He Y, Feng X, Yang L, Gao H, Zhao L, Huang L.   +8 more
europepmc   +1 more source

Giant Phonon‐Enhanced Terahertz Electro‐Optic Response in Ferroelectric van der Waals NbOX2 (X = Br, I)

Laser &Photonics Reviews, EarlyView.
Van der Waals ferroelectric NbOX2 thin films exhibit phonon‐resonance enhanced electro‐optic responses, 332 pm/V at 3.1 THz (NbOI2) and 192 pm/V at 3.7 THz (NbOBr2), the highest among vdW materials, and show 4% non‐resonant SHG modulation together with resonant phonon‐enhancement under a 150 kV/cm THz pump.
Baolong Zhang, Ruihuan Duan, Zheng Liu, Ranjan Singh   +3 more
wiley   +1 more source

Detection of Low-Density Foreign Objects in Infant Snacks Using a Continuous-Wave Sub-Terahertz Imaging System for Industrial Applications. [PDF]

Sensors (Basel)
Na BH, Lee DH, Choe J, Kim YD, Park MK.
europepmc   +1 more source

A Versatile Illumination System for Real-Time Terahertz Imaging. [PDF]

Sensors (Basel), 2020
Perraud JB, Chopard A, Guillet JP, Gellie P, Vuillot A, Mounaix P.   +5 more
europepmc   +1 more source