Results 71 to 80 of about 7,435 (167)

Determination of effective mechanical properties of a double-layer beam by means of a nano-electromechanical transducer

, 2014
We investigate the mechanical properties of a doubly-clamped, double-layer nanobeam embedded into an electromechanical system. The nanobeam consists of a highly pre-stressed silicon nitride and a superconducting niobium layer. By measuring the mechanical
Gross, Rudolf, Hocke, Fredrik, Huebl, Hans, Kippenberg, Tobias J., Pernpeintner, Matthias, Schliesser, Albert, Zhou, Xiaoqing   +6 more
core   +1 more source

High-efficiency degenerate four wave-mixing in triply resonant nanobeam cavities [PDF]

, 2013
We demonstrate high-efficiency, degenerate four-wave mixing in triply resonant Kerr $\chi^(3)$ photonic crystal (PhC) nanobeam cavities. Using a combination of temporal coupled mode theory and nonlinear finite-difference time-domain (FDTD) simulations ...
Alcorn, Thomas, Johnson, Steven G., Lin, Zin, Loncar, Marko, Rodriguez, Alejandro W.   +4 more
core   +2 more sources

Recent Advances in Stimulated Brillouin Scattering in Integrated Photonics

Advanced Physics Research, EarlyView.
This review systematically surveys recent advances in stimulated Brillouin scattering (SBS) within integrated photonics. It begins by elucidating the fundamental mechanisms of stimulated coupling between photons and acoustic phonons in nanoscale waveguides, enhanced by the photoelastic and moving boundary effects.
Songyue Liu, Qi Lu, Pan Hu, Yuan Zhong, Yu He, Yaojing Zhang, Young‐Ik Sohn, Yikai Su, Lu Sun   +8 more
wiley   +1 more source

Fabrication and characterization of high quality factor silicon nitride nanobeam cavities

, 2010
Si3N4 is an excellent material for applications of nanophotonics at visible wavelengths due to its wide bandgap and moderately large refractive index (n $\approx$ 2.0).
Babinec, Barclay, Barth, Barth, Barth, Beveratos, Deotare, Englund, Gong, Hausmann, Jelezko, Kendall, Makarova, Marko Lončar, McCutcheon, Mughees Khan, Murray W. McCutcheon, Parag Deotare, Park, Rivoire, Schietinger, Seidel, Srinivasan, Thomas Babinec   +23 more
core   +1 more source

Multimode Phonon Lasing via Self‐Induced Optical Coherent Pumping

Laser &Photonics Reviews, EarlyView.
A silicon optomechanical nanobeam generates self‐sustained phonon lasing in multiple competing mechanical modes via self‐pulsing, an intrinsic optical modulation arising from cavity nonlinearity. This self‐organized mechanism enables robust multi‐frequency operation spanning periodic, quasi‐periodic, and chaotic regimes without external modulation. The
David Alonso Tomás, Carlos Mas Arabí, Carles Milián, Néstor E. Capuj, Alejandro Martínez, Daniel Navarro Urrios   +5 more
wiley   +1 more source

Experimental Modal Analysis‐Driven Gaussian Process Regression Modeling of Rectangular Steel Beams With Various Hole Geometries

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT Understanding the dynamic behavior of structural components is crucial for optimizing performance and ensuring structural integrity. This study presents a new method that combines a systematic experimental investigation of four distinct hole geometries (circular, square, compact rectangular, and long rectangular) with varying hole counts, all ...
Amir Hossein Rabiee, Majid Rajaei, Mohammad Hossein Mahdavi Nasab, Parsa Shafiei   +3 more
wiley   +1 more source

Dynamic Actuation of Single-Crystal Diamond Nanobeams

, 2015
We show the dielectrophoretic actuation of single-crystal diamond nanomechanical devices. Gradient radio-frequency electromagnetic forces are used to achieve actuation of both cantilever and doubly clamped beam structures, with operation frequencies ...
Burek, Michael J., Kara, Vural, Kearns, Ryan, Lončar, Marko, Sohn, Young-Ik   +4 more
core   +1 more source

Diffusion-induced dephasing in nanomechanical resonators [PDF]

, 2010
We study resonant response of an underdamped nanomechanical resonator with fluctuating frequency. The fluctuations are due to diffusion of molecules or microparticles along the resonator.
A. Isacsson, A. N. Cleland, H. Risken, J. Atalaya, L. Landau, M. A. Ivanov, M. Gitterman, M. I. Dykman, M. I. Dykman   +8 more
core   +2 more sources

Computational methods for automated center determination in electron diffraction patterns

Journal of Applied Crystallography, EarlyView.
This study evaluates and compares automated methods for center detection in 2D diffractograms. The methods have been implemented in EDIFF, an open‐source user‐friendly Python package for the processing of electron diffraction patterns.Accurate center detection in electron diffraction patterns is critical for all subsequent processing of experimental ...
Pavlina Sikorova, Miroslav Slouf, Tomas Molnar, Vladislav Krzyzanek   +3 more
wiley   +1 more source

Improved image reconstruction in coherent diffraction imaging using self‐seeded XFEL pulses

Journal of Synchrotron Radiation, EarlyView.
This study demonstrates that the superior coherence of narrow‐bandwidth self‐seeded X‐ray pulses significantly improves the quality and reliability of image reconstruction in coherent diffraction imaging compared with conventional broad‐bandwidth SASE pulses.
Jaeyong Shin, Junha Hwang, Sejin Kim, Sung Yun Lee, Eunyoung Park, Sangsoo Kim, Changyong Song, Daewoong Nam   +7 more
wiley   +1 more source