نتایج جستجو برای: nanobeams
تعداد نتایج: 249 فیلتر نتایج به سال:
Abstract Controlling thermal energy transfer at the nanoscale and properties has become critically important in many applications since it often limits device performance. In this study, effects on conductivity arising from structure of free‐standing nanocrystalline silicon films increasing surface‐to‐volume ratio when fabricated into suspended optomechanical nanobeams are studied. Thermal tran...
Thermal radiation between parallel objects separated by deep subwavelength distances and subject to large thermal gradients (>100 K) can reach very high magnitudes, while being concentrated on a narrow frequency distribution. These unique characteristics could enable breakthrough technologies for thermal transport control and electricity generation (for example, by radiating heat exactly at the...
Abstract A light-trapping transparent electrode design based on sub-surface binary dielectric gratings is introduced and demonstrated experimentally. The structure consists of metallic wires patterned with an array silicon nanobeams. Optimization the grating geometry achieves selective suppression zero-order diffraction, while enabling redirection incident light to angle that exceeds critical l...
The flexoelectric effect is a coupling of polarization and strain gradient, which exists in a wide variety of materials and may lead to strong size-dependent properties at the nanoscale. Based on an extension to the classical beam model, this paper investigates the electromechanical coupling response of piezoelectric nanobeams with different electrical boundary conditions including the effect o...
The metal to insulator transition (MIT) of strongly correlated materials is subject to strong lattice coupling, which brings about the unique one-dimensional alignment of metal-insulator (M-I) domains along nanowires or nanobeams. Many studies have investigated the effects of stress on the MIT and hence the phase boundary, but few have directly examined the temperature profile across the metal-...
Within the framework of the ESRF Phase I Upgrade Programme, a new state-of-the-art synchrotron beamline ID16B has been recently developed for hard X-ray nano-analysis. The construction of ID16B was driven by research areas with major scientific and societal impact such as nanotechnology, earth and environmental sciences, and bio-medical research. Based on a canted undulator source, this long be...
Motivated by the need to have a fully nonlinear beam model usable at nanoscale, in this paper equilibrium problem of inflexed nanobeams context nonlocal finite elasticity is investigated. Considering both deformations and displacements large, three-dimensional kinematic has been proposed. Extending linear Eringen theory, constitutive law integral form for Cauchy stress tensor defined. Finally, ...
We demonstrated GaN-based photonic crystal (PC) nanobeam cavities by using the e-beam lithography and the suspended nanobeams were realized by focused-ion beam (FIB) milling. One resonant mode was clearly observed at 411.7 nm at 77K by optical pumping. The quality factor was measured to be to 7.4 × 10(2). Moreover, the degree of polarization value was measured to be 40%. The temperature-depende...
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