Results 71 to 80 of about 6,930 (295)

Second‐Harmonic Hyper‐Mie Optical Activity Enables Closed‐Loop Chiral Photochemistry

Advanced Materials, EarlyView.
Nonlinear chiral photochemistry is demonstrated in CdTe/CdO nanohelices, where circularly polarized infrared light both drives and tracks photo‐oxidation via second‐harmonic scattering. This closed‐loop process reveals real‐time structural evolution, including shell fracturing and core exposure, accompanied by a transition from hyper‐Mie to hyper ...
Hoyeon Choi, Kody Whisnant, Ben J. Olohan, E. Petronijevic, G. Dan Pantoș, Nicholas A. Kotov, Ventsislav K. Valev   +6 more
wiley   +1 more source

Three-dimensional joint inversion of traveltime and gravity data across the Chicxulub impact crater

, 2009
In 2005 an extensive new seismic refraction data set was acquired over the central part of the Chicxulub impact crater, allowing us to image its structure with much better resolution than before.
Morgan, J. V., Christeson, G.L., Vermeesch, P. M., Morgan, J.V., Surendra, A., Christeson, G. L., Barton, P.J., Vermeesch, P.M., Barton, P. J.   +8 more
core   +1 more source

Investigation of pulse pedestal and dynamic chirp formation on picosecond pulses after propagation through an SOA [PDF]

, 2005
The authors investigate the propagation of picosecond pulses through semiconductor optical amplifiers using the measurement technique of frequency resolved optical gating.
Anandarajah, Prince M., Clarke, A.M., Anandarajah, P., Liam P. Barry (12581653), A.M. Clarke (12581647), D. Reid (3183057), Michael J. Connelly (12581632), Reid, Douglas A., Barry, Liam P., Reid, D., Clarke, Aisling M., Connelly, Michael J., P. Anandarajah (12581650)   +12 more
core   +1 more source

Effect of a nonlinear refractive index on Faraday rotation [PDF]

Physical Review A, 1977
A theory for the nonlinear (with respect to the electric field) Faraday effect has been developed and applied to a simple model. Within the frame-work of this model our analysis shows that the ratio of the nonlinear Verdetconstant to the linear Verdet constant is proportional to the intensity of theincident light and depends on the frequency of light ...
Yu, Yi Jung, Osborn, Richard K.
openaire   +3 more sources

Super‐Resolution Ultrasound Based Cell Tracking With Polymeric Nanobubbles

Advanced Materials, EarlyView.
This study presents a super‐resolution ultrasound platform for tracking cells in vivo. Biocompatible polymeric nanobubbles are used as highly echogenic intracellular labels. Following the injection of cells and microbubbles, ultrasound localization microscopy (ULM) can dynamically match the microvascular architecture and individual cell trajectories ...
Junlin Chen, Xiaoyu Wang, Jilin Fan, Bi Wang, Hanghang Fang, Yurui Wang, Hao Cui, Mohammad Roufarshbaf, Ekaterina Savina, Alexandra Valeske, Quim Peña, Yang Shi, Andreas Herrmann, Twan Lammers, Mathias Hornef, Roman Barmin, Thomas Lisson, Georg Schmitz, Anne Rix, Fabian Kiessling   +19 more
wiley   +1 more source

Light guiding light: nonlinear refraction in rubidium vapour [PDF]

Technical Digest. Summaries of papers presented at the Quantum Electronics and Laser Science Conference. Postconference Technical Digest (IEEE Cat. No.01CH37172), 2001
A quantum mechanical model of the interaction of rubidium atoms with two lasers was developed. The dielectric polarization of the rubidium as a function of the frequency was predicted using a quantum mechanical model. The presence of two major isotopes of rubidium was studied.
Andersen, J. A., Friese, M. E J, Truscott, A. G., Ficek, Z., Drummond, Peter, Heckenberg, N. R., Rubinsztein-Dunlop, H.   +6 more
openaire   +5 more sources

Time‐Resolved Simultaneous Mapping of Thickness and Nanoparticle Concentration in Nanofluid Thin Films via Imaging Ellipsometry and Deep‐UV Reflectance Imaging

Advanced Materials Interfaces, EarlyView.
This study establishes a dual‐channel optical metrology framework integrating phase‐shifting imaging ellipsometry and deep‐UV reflectance imaging. This label‐free approach enables simultaneous, time‐resolved mapping of film thickness and nanoparticle (NP) concentration in dynamic nanofluid thin films.
Eita Shoji, Keita Aizawa, Hiroki Kusudo, Tetsushi Biwa   +3 more
wiley   +1 more source

Plasmon-exciton coupling in nanostructured metal-semiconductor composite films

AIP Advances, 2019
Nonlinear optical response of metal-semiconductor Zn0.8Co0.2O/Au nanocomposite films was studied experimentally and theoretically. Z-scan measurements revealed a positive nonlinear index of refraction of the composite film.
Viktoriia V. Savchuk, Roman V. Gamernyk, Ihor S. Virt, Serhiy Z. Malynych, Anatoliy O. Pinchuk   +4 more
doaj   +1 more source

Study of the dispersion of nonlinear refraction in InSb

, 2006
We studied the nonlinear refraction due to bound electrons in InSb using femtosecond pulses in the range of 8-13 μm and show that the nonlinear refraction coefficient changes sign at a wavelength around 10 μm.
Hagan, D. J., D. J. Hagan, Van Stryland, E. W., E. W. Van Stryland, C. M. Cirloganu, Cirloganu, C. M.   +5 more
core   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source