Probing Symmetry Properties of Few-Layer MoS2 and h-BN by …
2013年5月29日 · We have measured optical second-harmonic generation (SHG) from atomically thin samples of MoS 2 and h-BN with one to five layers. We observe strong SHG from materials with odd layer thickness, for which a noncentrosymmetric structure is expected, while the centrosymmetric materials with even layer thickness do not yield appreciable SHG.
Interlayer exciton mediated second harmonic generation in bilayer MoS2 ...
2021年11月25日 · In this work we demonstrate strong, tunable SHG based on exciton resonances in nominally inversion-symmetric MoS 2 bilayers with 2H stacking: Varying the laser excitation energy allows us to...
Giant second harmonic generation in bulk monolayer MoS2 thin …
2024年7月3日 · The SHG studies demonstrate a giant SHG in BM-MoS 2 that is 126 times higher than monolayer MoS 2 and 21 times higher than gallium arsenide (GaAs), a material with the highest second-order NLO susceptibility among known bulk semiconductors.
All-optical polarization and amplitude modulation of second …
2021年9月9日 · Here we demonstrate a novel approach for the all-optical control of the second-harmonic (SH) polarization in MoS 2 and show that this can be used for all-optical modulation of the SH efficiency...
Atomically phase-matched second-harmonic generation in a 2D …
2016年3月14日 · Few-atom-thick slivers of the 3R phase of molybdenum disulfide (MoS2) are promising for ultrathin second-harmonic generation (SHG). Thinner nonlinear media are desired for use in...
Boosting Second-Harmonic Generation in Monolayer ... - ACS …
2022年1月24日 · A strong anisotropic enhancement of optical 2nd-harmonic generation (SHG) in monolayer MoS2 by integrating with 1-dimensional (1D) TiO2 nanowires (NWs) is reported. The SHG signal from the MoS2/NW hybrid structures is >2 orders of magnitude stronger than that in the bare monolayer MoS2.
Second harmonic microscopy of monolayer MoS 2 - Physical …
2013年4月15日 · A proof-of-principle second harmonic microscopy measurement is performed on samples grown by chemical vapor deposition, which illustrates potential applications of this effect in the fast and noninvasive detection of crystalline orientation, thickness uniformity, layer stacking, and single-crystal domain size of atomically thin films of MoS and ...
Edge Nonlinear Optics on a MoS2 Atomic Monolayer | Science
2014年5月2日 · The broken inversion symmetry of the atomically thin monolayer shows strong second-harmonic generation (SHG), in contrast to the centrosymmetric bulk material, which is immune to the second-order nonlinear processes.
Large enhancement of second-harmonic generation in MoS2 …
2020年12月1日 · In this letter, we demonstrate the enhancement of SHG by integrating MoS 2 with a high Q 1D PC. Such 1D PCs allow simultaneously high Q resonances, large interaction areas, flexible design possibilities of the optical mode structures, and ready integration with 2D materials in a silicon-compatible 2D layout.
Enhanced second-harmonic generation in monolayer MoS2 on …
Here, we demonstrate a hybrid structure consisting of a monolayer MoS 2 on a suspended perforated silver film, on which the SHG signal emitted from the monolayer MoS 2 is enhanced by more than three orders of magnitude at room temperature.