Effect of Laser Beam Profile on Rotating Lattice Single Crystal Growth in Sb2S3 Model Glass
1
Physics Department, Lehigh University, Bethlehem, PA 18015, USA
2
Materials Science and Engineering Department, Lehigh University, Bethlehem, PA 18015, USA
3
Physics Department, Lebanon Valley College, Annville, PA 17003, USA
*
Author to whom correspondence should be addressed.
†
Co-first authors who contributed equally.
Crystals 2021, 11(1), 36; https://doi.org/10.3390/cryst11010036
Received: 24 November 2020 / Revised: 24 December 2020 / Accepted: 29 December 2020 / Published: 31 December 2020
(This article belongs to the Special Issue Laser-Induced Crystallization)
Laser heating of chalcogenide glasses has successfully produced rotating lattice single crystals through a solid-solid transformation. To better understand the nature of complex, orientation-dependent lattice rotation, we designed heat profiles of the continuous wave laser by beam shaping, fabricated larger Sb2S3 crystal dots in Sb2S3 glass, and investigated the lattice rotation where the crystal could grow in all radial directions under a circular thermal gradient. The results show that the rate of lattice rotation is highly anisotropic and depends on crystallographic direction. The nature of this rotation is the same in crystals of different orientation relative to the surface. The growth directions that align with the slip planes show the highest rate of rotation and the rotation rate gradually decreases away from this direction. Additionally, the presence of multiple growth directions results in a complicated rotation system. We suggest that the growth front influences the density of dislocations introduced during growth under confinement and thus affects the lattice rotation rate in these crystals.
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Keywords:
direct laser writing; single crystal growth; devitrification; lattice orientation; beam shaping; chalcogenide glass
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MDPI and ACS Style
Au-Yeung, C.; Savytskii, D.; Veenhuizen, K.; Dierolf, V.; Jain, H. Effect of Laser Beam Profile on Rotating Lattice Single Crystal Growth in Sb2S3 Model Glass. Crystals 2021, 11, 36. https://doi.org/10.3390/cryst11010036
AMA Style
Au-Yeung C, Savytskii D, Veenhuizen K, Dierolf V, Jain H. Effect of Laser Beam Profile on Rotating Lattice Single Crystal Growth in Sb2S3 Model Glass. Crystals. 2021; 11(1):36. https://doi.org/10.3390/cryst11010036
Chicago/Turabian StyleAu-Yeung, Courtney; Savytskii, Dmytro; Veenhuizen, Keith; Dierolf, Volkmar; Jain, Himanshu. 2021. "Effect of Laser Beam Profile on Rotating Lattice Single Crystal Growth in Sb2S3 Model Glass" Crystals 11, no. 1: 36. https://doi.org/10.3390/cryst11010036
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