Enhanced second and third harmonic generations of vertical and planar spiral MoS2 nanosheets
Jinlin Zhang1, Mingxiao Ye1, Shiva Bhandari1
1Department of Physics, Michigan Technological University, Michigan, 49931, United States of America.
Abstract:
Molybdenum disulfide (MoS2), as one of the atomically thin two-dimensional transition metal dichalcogenides has novel layer-dependent optical and electronic properties, which make it competitive for potential applications in optoelectronics. Here, we report chemical vapor deposition growth of vertically-standing and planar spiral MoS2 nanosheets. These vertical spiral MoS2 nanosheets are formed by the compression between planar spiral MoS2 in a close proximity. Both structures have a polytype 3R stacking with broken inversion symmetry, exhibiting strong second and third harmonic generations.
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