Results 21 to 30 of about 148,775 (300)

Near-Field Second-Harmonic Generation Induced by Local Field Enhancement [PDF]

open access: yes, 2003
The field near a sharp metal tip can be strongly enhanced if irradiated with an optical field polarized along the tip axis. We demonstrate that the enhanced field gives rise to local second-harmonic (SH) generation at the tip surface thereby creating a ...
Beversluis, M.   +3 more
core   +1 more source

Resonant plasmonic nanoparticles for multicolor second harmonic imaging [PDF]

open access: yes, 2016
Nanoparticles capable of efficiently generating nonlinear optical signals, like second harmonic generation, are attracting a lot of attention as potential background-free and stable nano-probes for biological imaging.
Accanto, Nicolò   +4 more
core   +2 more sources

Simplified Brushless Wound Field Synchronous Machine Topology Based on a Three-Phase Rectifier

open access: yesIEEE Access, 2021
This paper proposes a novel simplified brushless wound field synchronous machine (BL-WFSM) topology based on an uncontrolled three-phase rectifier. The output of the rectifier is injected into the common point of the star-connected three-phase armature ...
Syed Sabir Hussain Bukhari   +3 more
doaj   +1 more source

Excitation of second harmonic terahertz surface magnetoplasmons over a rippled surface of n-InSb

open access: yesResults in Optics, 2023
We analyzed the excitation of second harmonic (SH) terahertz (THz) surface magnetoplasmons (SMPs) over a n-type semiconductor (n-InSb)-free space interface.
Rohit Kumar Srivastav, A. Panwar
doaj   +1 more source

A low-speed linear harmonic generator for grid-tied and stand-alone operation using hybrid excitation topology [PDF]

open access: yes, 2015
Paper no. BP-09Since intermediate mechanical conversion mechanisms for speed, torque and motion conversion can be entirely eliminated, the direct-drive wave power generation attracts more and more attention [1].
Chau, KT, Ching, TW, Li, WL, Liu, C
core   +1 more source

Numerical treatment of seismic accelerograms and of inelastic seismic structural responses using harmonic wavelets [PDF]

open access: yes, 2007
The harmonic wavelet transform is employed to analyze various kinds of nonstationary signals common in aseismic design. The effectiveness of the harmonic wavelets for capturing the temporal evolution of the frequency content of strong ground motions is ...
Burrus C. S.   +6 more
core   +1 more source

Lieb's soliton-like excitations in harmonic trap

open access: yes, 2013
We study the solitonic Lieb II branch of excitations in one-dimensional Bose-gas in homogeneous and trapped geometry. Using Bethe-ansatz Lieb's equations we calculate the "effective number of atoms" and the "effective mass" of the excitation.
Astrakharchik, G. E., Pitaevskii, L. P.
core   +1 more source

Iron Loss Analysis and Efficiency Calculation of Double Stator HTS Machine With Stationary Seal

open access: yesIEEE Access, 2022
This paper mainly analyzes the iron loss of a double stator high-temperature superconducting (HTS) machine with stationary seal and calculates its efficiency. Firstly, according to the field-modulation theory, the air-gap flux density harmonic components
Wenzhong Ma   +4 more
doaj   +1 more source

Near-threshold high-order harmonic spectroscopy with aligned molecules

open access: yes, 2010
We study high-order harmonic generation in aligned molecules close to the ionization threshold. Two distinct contributions to the harmonic signal are observed, which show very different responses to molecular alignment and ellipticity of the driving ...
Botheron, P.   +8 more
core   +1 more source

Second Harmonic Coherent Driving of a Spin Qubit in a Si/SiGe Quantum Dot

open access: yes, 2015
We demonstrate coherent driving of a single electron spin using second harmonic excitation in a Si/SiGe quantum dot. Our estimates suggest that the anharmonic dot confining potential combined with a gradient in the transverse magnetic field dominates the
Coppersmith, S. N.   +8 more
core   +1 more source

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