New method for MBE growth of GaAs nanowires on silicon using colloidal Au nanoparticles

Bouravleuv, A. D.; Ilkiv, I. V.; Reznik, R. R.; Kotlyar, K. P.; Сошніков, І. П.; Cirlin, G. É.; Brunkov, P. N.; Kirilenko, D. A.; Bondarenko, L. V.; Nepomnyaschiy, Aleksandr; Грузнев, Д. В.; Зотов, А. В.; Саранин, А. А.; Dhaka, Veer; Lipsanen, Harri

doi:10.1088/1361-6528/aa9ab1

Cited by 8 publications

(16 citation statements)

References 68 publications

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“…The vertically standing nanodisks were fabricated from GaAs/AlGaAs core-shell nanowires deposited on ITO glass substrate using FIB milling. The nanowires were grown by molecular beam epitaxy on Si (111) substrates, using Au colloid droplets as a catalyst material 42 . As the first step, the GaAs core of nanowires were grown, then in situ the Al 0.2 Ga 0.8 As shells were grown to passivate the surface states 47 .…”

Section: High-order Multipolesmentioning

confidence: 99%

“…Figure 1 presents the main steps of the fabrication process. We mechanically transferred nanowires, grown by molecular beam epitaxy 42 cylindrical structure as highlighted in red in Figure 2 and it is placed on a glass substrate. The center of the disk is aligned with the center of the simulation sphere, where we perform our calculations.…”

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confidence: 99%

“…40−42 Figure 1 presents the main steps of the fabrication process. We mechanically transferred nanowires, grown by molecular beam epitaxy, 43 onto a glass substrate covered with indium tin oxide (ITO) (Figure 1a). Using focused ion beam (FIB) milling, we sliced them into standing disks with diameters of 440 nm and heights of 210 nm.…”

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confidence: 99%

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Anapoles in Free-Standing III–V Nanodisks Enhancing Second-Harmonic Generation

et al. 2018

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Nonradiating electromagnetic configurations in nanostructures open new horizons for applications due to two essential features: a lack of energy losses and invisibility to the propagating electromagnetic field. Such radiationless configurations form a basis for new types of nanophotonic devices, in which a strong electromagnetic field confinement can be achieved together with lossless interactions between nearby components. In our work, we present a new design of free-standing disk nanoantennas with nonradiating current distributions for the optical near-infrared range. We show a novel approach to creating nanoantennas by slicing III-V nanowires into standing disks using focused ion-beam milling. We experimentally demonstrate the suppression of the far-field radiation and the associated strong enhancement of the second-harmonic generation from the disk nanoantennas. With a theoretical analysis of the electromagnetic field distribution using multipole expansions in both spherical and Cartesian coordinates, we confirm that the demonstrated nonradiating configurations are anapoles. We expect that the presented procedure of designing and producing disk nanoantennas from nanowires becomes one of the standard approaches to fabricating controlled chains of standing nanodisks with different designs and configurations. These chains can be essential building blocks for new types of lasers and sensors with low power consumption.

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Section: High-order Multipolesmentioning

confidence: 99%

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confidence: 99%

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Anapoles in Free-Standing III–V Nanodisks Enhancing Second-Harmonic Generation

et al. 2018

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“…First, the nanowires were grown by molecular beam epitaxy on Si (111) substrates using Au colloid droplets as a catalyst material. [63] As a next step, the GaAs nanowires were grown, and Al 0.2 Ga 0.8 As shells were grown in situ to passivate the surface states. [64] The nanowires were then transferred on the ITO covered glass substrate and sliced in the focused Gallium liquid metal ion microscope coupled with a high-resolution field effect gun scanning electron microscope (NVision 40, Carl Zeiss AG).…”

Section: Methodsmentioning

confidence: 99%

Engineering of the Second‐Harmonic Emission Directionality with III–V Semiconductor Rod Nanoantennas

Saerens

Tang

Petrov

et al. 2020

Laser & Photonics Reviews

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The ability to engineer nonlinear optical emission from nanostructures is a key challenge to create efficient and compact components for integrated devices. This paper shows a method to control and manipulate the directionality of second‐harmonic generation emission by engineering geometry and position of rod nanoantennas. Single and dimer nanoantennas are fabricated by slicing III–V semiconductor nanowires with focused ion beam milling. The nonlinear optical response of nanoantennas is tailored by adjusting their length and position to achieve a targeted phase difference. The studied GaAs nanoantennas have a wurtzite structure that allows to achieve preferable directions for the second‐harmonic emission compared to a typical bulk zinc blende structure from top‐down fabricated nanostructures. Wurtzite nanoantennas provide a pure electric dipole response at the second‐harmonic wavelength, which together with pi‐phase control of emitted light is used for designing nonlinear emission patterns. The simulation results show how to redirect the second‐harmonic beam up to 30° and how to tailor the emission profile by adding elements. This method of second‐harmonic generation manipulation and phase array engineering can be applied to different types of nanowires and nanostructures. Nonlinear beam steering with structures from nanowires will foster the creation of compact optical components for integrated circuits.

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“…To promote NWs growth, we have used calibrated Au nanoparticles with average diameter of 20 nm. These particles were randomly dispersed onto substrate and subjected to a special procedure described in [31]. The procedure of Au nanoparticles deposition, in principal, allows one to control the density of the seeds.…”

Section: Methodsmentioning

confidence: 99%

Effect of the Uniaxial Compression on the GaAs Nanowire Solar Cell

et al. 2020

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Research regarding ways to increase solar cell efficiency is in high demand. Mechanical deformation of a nanowire (NW) solar cell can improve its efficiency. Here, the effect of uniaxial compression on GaAs nanowire solar cells was studied via conductive atomic force microscopy (C-AFM) supported by numerical simulation. C-AFM I–V curves were measured for wurtzite p-GaAs NW grown on p-Si substrate. Numerical simulations were performed considering piezoresistance and piezoelectric effects. Solar cell efficiency reduction of 50% under a −0.5% strain was observed. The analysis demonstrated the presence of an additional fixed electrical charge at the NW/substrate interface, which was induced due to mismatch between the crystal lattices, thereby affecting the efficiency. Additionally, numerical simulations regarding the p-n GaAs NW solar cell under uniaxial compression were performed, showing that solar efficiency could be controlled by mechanical deformation and configuration of the wurtzite and zinc blende p-n segments in the NW. The relative solar efficiency was shown to be increased by 6.3% under −0.75% uniaxial compression. These findings demonstrate a way to increase efficiency of GaAs NW-based solar cells via uniaxial mechanical compression.

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New method for MBE growth of GaAs nanowires on silicon using colloidal Au nanoparticles

Cited by 8 publications

References 68 publications

Anapoles in Free-Standing III–V Nanodisks Enhancing Second-Harmonic Generation

Anapoles in Free-Standing III–V Nanodisks Enhancing Second-Harmonic Generation

Engineering of the Second‐Harmonic Emission Directionality with III–V Semiconductor Rod Nanoantennas

Effect of the Uniaxial Compression on the GaAs Nanowire Solar Cell

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