UV laser-induced nanostructured porous oxide in GaAs crystals

Salimon, Igor A.; Averchenko, A. V.; Lipovskikh, Svetlava A.; Скрылева, Е. А.; Novikov, Artyom V.; Lagoudakis, Pavlos G.; Mailis, S.

doi:10.1016/j.solidstatesciences.2022.106887

Cited by 2 publications

(4 citation statements)

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“…Nevertheless, in both cases the period is essentially the same. This qualitative difference is attributed to more efficient optical feedback in the former case [ 18 ]. Raman spectroscopy provided verification that both tracks with periodically modulated thickness indeed consist of MoS 2 .…”

Section: Resultsmentioning

confidence: 99%

“…Formation of LIPSS was extensively reported on thin films of metals [ 18 ] and polymers [ 22 ]. Most works that mention the production of 1D and 2D LIPSS on thin films used pulsed irradiation and demonstrated the dependences of the obtained patterns on the number of laser pulses.…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, the amount of scatterers increase with the concentration, suggesting that scattering intensity could be a significant factor in the 1D and 2D LIPSS formation selectivity. Formation of LIPSS was extensively reported on thin films of metals [18] and polymers [22]. Most works that mention the production of 1D and 2D LIPSS on thin films used pulsed irradiation and demonstrated the dependences of the obtained patterns on the number of laser pulses.…”

Section: D Lipssmentioning

confidence: 99%

“…The modulation of the topography can be caused by material removal (laser ablation), where variations of the local intensity register in the amount of material that is removed, and thus the resulting topography reflects the optical intensity modulation [ 16 ]. Another way of modifying the surface topography is by laser-induced photochemical/thermochemical processes such as local oxidation [ 17 , 18 ]. LIPSS consists typically of periodic features, with a period that is comparable to the wavelength of the irradiating laser, which are oriented in accordance with the polarization of the incident beam [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

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Laser-Synthesized 2D-MoS2 Nanostructured Photoconductors

et al. 2023

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The direct laser synthesis of periodically nanostructured 2D transition metal dichalcogenide (2D-TMD) films, from single source precursors, is presented here. Laser synthesis of MoS2 and WS2 tracks is achieved by localized thermal dissociation of Mo and W thiosalts, caused by the strong absorption of continuous wave (c.w.) visible laser radiation by the precursor film. Moreover, within a range of irradiation conditions we have observed occurrence of 1D and 2D spontaneous periodic modulation in the thickness of the laser-synthesized TMD films, which in some cases is so extreme that it results in the formation of isolated nanoribbons with a width of ~200 nm and a length of several micrometers. The formation of these nanostructures is attributed to the effect that is known as laser-induced periodic surface structures (LIPSS), which is caused by self-organized modulation of the incident laser intensity distribution due to optical feedback from surface roughness. We have fabricated two terminal photoconductive detectors based on nanostructured and continuous films and we show that the nanostructured TMD films exhibit enhanced photo-response, with photocurrent yield increased by three orders of magnitude as compared to their continuous counterparts.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%