Results 31 to 40 of about 20,656 (214)

Probing Steady‐State Carrier Properties and Charge Transport in Covalent Organic Framework by Frequency‐Domain Terahertz Spectroscopy

open access: yesAngewandte Chemie, EarlyView.
This work reports a combined frequency‐domain and time‐domain terahertz (THz) spectroscopic approach to elucidate intrinsic carrier properties and transport mechanisms in framework materials over the extended 0.5–20 THz region. Subtle structural and chemical variations are shown to strongly influence THz charge‐transport behavior across the far ...
Satyapriya Nath   +13 more
wiley   +2 more sources

A Multi-Scale Spatial Difference Approach to Estimating Topography Correlated Atmospheric Delay in Radar Interferograms

open access: yesRemote Sensing, 2023
The Interferometric Synthetic Aperture Radar (InSAR) has been widely used as a powerful technique for monitoring land surface deformations over the last three decades.
Zhigang Yu   +5 more
doaj   +1 more source

Application of DInSAR-GPS optimization for derivation of fine-scale surface motion maps of Southern California [PDF]

open access: yes, 2007
A method based on random field theory and Gibbs-Markov random fields equivalency within Bayesian statistical framework is used to derive 3-D surface motion maps from sparse global positioning system (GPS) measurements and differential interferometric ...
Li, Z.   +3 more
core   +1 more source

The Atmospheric Vertical Detection of Large Area Regions Based on Interference Signal Denoising of Weighted Adaptive Kalman Filter

open access: yesSensors, 2022
In comparison with traditional space infrared spectroscopy technology, the interference signals of a large focal plane array (FPA) can be used to obtain spectra over a larger area range and rapidly achieve large-scale coverage of hyperspectral remote ...
Qiying Shen   +6 more
doaj   +1 more source

Quantised Vortices in an Exciton-Polariton Fluid [PDF]

open access: yes, 2008
One of the most striking quantum effects in a low temperature interacting Bose gas is superfluidity. First observed in liquid 4He, this phenomenon has been intensively studied in a variety of systems for its amazing features such as the persistence of ...
A Baas   +36 more
core   +4 more sources

Earthquake source parameters of the 2009 Mw 7.8 Fiordland (New Zealand) earthquake from L-band InSAR observations [PDF]

open access: yes, 2011
The 2009 MW7.8 Fiordland (New Zealand) earthquake is the largest to have occurred in New Zealand since the 1931 Mw 7.8 Hawke’s Bay earthquake, 1 000 km to the northwest.
Li, Z., Qin, Z., Qu, W., Young, K.
core   +1 more source

Attosecond electron spectroscopy using a novel interferometric pump-probe technique [PDF]

open access: yes, 2010
We present an interferometric pump-probe technique for the characterization of attosecond electron wave packets (WPs) that uses a free WP as a reference to measure a bound WP.
A. L’Huillier   +20 more
core   +3 more sources

Polynomial fit of interferograms [PDF]

open access: yesApplied Optics, 1982
Polynomial fit of interferograms is analyzed quantitatively. The errors from polynomial fit, such as fit error, digitization error, roundoff error, and finite sampling error, are explained. The advantage of using orthonormal polynomials are presented.
openaire   +2 more sources

Biosensing Using Microring Resonator Interferograms [PDF]

open access: yesSensors, 2014
Optical low-coherence interferometry (OLCI) takes advantage of the variation in refractive index in silicon-wire microring resonator (MRR) effective lengths to perform glucose biosensing using MRR interferograms. The MRR quality factor (Q), proportional to the effective length, could be improved using the silicon-wire propagation loss and coupling ...
Hsu, Shih-Hsiang   +5 more
openaire   +3 more sources

Single Exposure Phase-Only Optical Image Encryption and Hiding Method via Deep Learning

open access: yesIEEE Photonics Journal, 2022
Phase-only optical image security technology Based on one-time pad is an encryption and hiding method by introducing random key through phase modulation, which can improve the security of the system to a great extent. The application of traditional phase-
Qinnan Zhang, Jiaosheng Li
doaj   +1 more source

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