Results 41 to 50 of about 11,658 (306)
Spectrally resolved wave-mixing between near- and far-infrared pulses in gas [PDF]
, 2013 We investigate the nonlinear wave-mixing in gases between intense, short optical pulses and long-wavelength fields (mid infrared and terahertz). We show numerically that the beating between the sum- and difference-frequency generation components can be ...
Schmidt, Bruno E. +37 more
core +1 more source
Terahertz phase retrieval imaging in reflection [PDF]
Optics Letters, 2020 Terahertz phase retrieval is a promising technique able to assess the complex diffracted wave properties through an iterative processing algorithm. In this Letter, we demonstrate the implementation of this technique in reflection geometry with a continuous wave acquisition system working at 0.287 THz.
Nikolay V. Petrov +5 more
openaire +3 more sources
Hyperspectral terahertz imaging for human bone biometrics [PDF]
, 2021 The realisation of hyperspectral terahertz imaging is a significant step towards understanding of the life sciences on all scales. A key to this understanding is the retrieval of dielectric properties from such images, a task which is plagued by ...
Sui, Cong +11 more
core +1 more source
Cladding‐Free Antiresonance in Tubular Structures
Advanced Photonics Research, 2022 Antiresonance reflection (ARR) effectively turns tubular structures into functional devices ranging from waveguides to spectrometers and sensors, thus attracting a growing number of interests in recent years.
Jiayu Zhao +7 more
doaj +1 more source
High resolution terahertz raster imaging
, 2022 Art. 5324610We present recent progress in on-the-fly broadband raster transmission and reflection terahertz imaging with a focus on the data evaluation. Possibilities to enhance the resolution by frequency domain filtering as well as terahertz tomography
Torosyan, G. +4 more
core +1 more source
Molecular imaging with terahertz waves
Optics Express, 2011 We demonstrate a highly sensitive THz molecular imaging (TMI) technique involving differential modulation of surface plasmons induced on nanoparticles and obtain target specific in vivo images of cancers. This technique can detect quantities of gold nanoparticles as small as 15 µM in vivo. A comparison of TMI images with near infrared absorption images
Seung Jae, Oh +8 more
openaire +3 more sources
Multilayer Terahertz Imaging at Kilohertz Pixel Rate
, 2023 We present our recent results on multilayer terahertz imaging at 1.6 kHz pixel rate employing an ECOPS (electronically controlled optical sampling) based terahertz time-domain spectroscopy system.
Molter, Daniel +7 more
core +1 more source
Nanomaterials, 2022 Due to its high sensitivity and because it does not rely on the magneto-optical response, terahertz (THz) emission spectroscopy has been used as a powerful time-resolved tool for investigating ultrafast demagnetization and spin current dynamics in ...
Zhangshun Li +8 more
doaj +1 more source
Microelectromechanical Maltese-cross metamaterial with tunable terahertz anisotropy
, 2012 Dichroic polarizers and waveplates exploiting anisotropic materials have vast applications in displays and numerous optical components, such as filters, beamsplitters and isolators. Artificial anisotropic media were recently suggested for the realization
Zhu, W.M. +8 more
core +1 more source
Advanced Functional Materials, EarlyView.Moiré band engineering in graphene/hexagonal boron nitride–based superlattices unlocks van Hove singularities (VHSs) for terahertz (THz) optoelectronics. Tuning the Fermi level near these singularities, associated with secondary neutrality points (SNPs), enhances the photothermoelectric response.
Leonid Elesin +16 more
wiley +1 more source