Observation of intense second harmonic generation from MoS 2 atomic crystals

@article{Malard2013ObservationOI,
  title={Observation of intense second harmonic generation from MoS 2 atomic crystals},
  author={L. Malard and T. V. Alencar and A. Barboza and K. Mak and A. M. Paula},
  journal={Physical Review B},
  year={2013},
  volume={87},
  pages={201401}
}
The nonlinear optical properties of few-layer MoS${}_{2}$ two-dimensional crystals are studied using femtosecond laser pulses. We observed highly efficient second-harmonic generation from the odd-layer crystals, which shows a polarization intensity dependence that directly reveals the underlying symmetry and orientation of the crystal. Additionally, the measured second-order susceptibility spectra provide information about the electronic structure of the material. Our results open up… Expand

Figures from this paper

Third-harmonic generation in ultrathin films of MoS2.
TLDR
The demonstrated third-harmonic generation can be used for nonlinear optical identification of MoS2 atomic layers with high contrast, better distinguishing power of multilayers, and less restrictions to substrate selections. Expand
Strong Second-Harmonic Generation in Atomic Layered GaSe.
TLDR
The first observation of strong optical second-harmonic generation (SHG) in monolayer GaSe under nonresonant excitation and emission condition is reported and provides a route toward exploring the structural information and the possibility to observe other nonlinear effects in GaSe atomic layers. Expand
Atomically phase-matched second-harmonic generation in a 2D crystal
TLDR
The constructive nature of the SHG in this 2D crystal provides a platform to reliably develop atomically flat and controllably thin nonlinear media. Expand
Second-harmonic generation in quaternary atomically thin layered AgInP2S6 crystals
Nonlinear effects in two-dimensional (2D) atomic layered materials have attracted increasing interest. Here, we report the observation of optical second-harmonic generation (SHG) in two-dimensionalExpand
Investigation of Second- and Third-Harmonic Generation in Few-Layer Gallium Selenide by Multiphoton Microscopy
TLDR
This work reports on the nonlinear optical properties of few-layer GaSe using multiphoton microscopy, and finds that even the peak at the wavelength of 390 nm, corresponding to the fourth-harmonic generation or the sum frequency generation from third- Harmonic generation and pump light, was detected during the spectral measurements in thin GaSe flakes. Expand
Extraordinary Second Harmonic Generation in ReS2 Atomic Crystals
We report the observations of unexpected layer-dependent, strong, and anisotropic second harmonic generations (SHGs) in atomically thin ReS2. Appreciable (negligible) SHGs are obtained from evenExpand
Giant Optical Second Harmonic Generation in Two-Dimensional Multiferroics.
TLDR
The present findings provide a microscopic understanding of the large SHG susceptibility in 2D group IV monochalcogenide multiferroics from first-principles theory and open up a variety of new avenues for 2D ferroelectrics, multiferraics, and nonlinear optoelectronics. Expand
Ultrashort optical pulse characterization using WS₂ monolayers.
TLDR
Synthesized monolayer WS₂ triangular islands were used to characterize ultrashort optical pulses at the focal point of an objective lens through second-harmonic generation collinear frequency-resolved optical gating. Expand
Large enhancement of second-harmonic generation in MoS2 by one dimensional photonic crystals
Abstract Monolayer transition-metal dichalcogenides (TMDCs) with intrinsically broken crystal inversion symmetry have shown large second-order nonlinear responses, providing a new platform forExpand
Optical second-harmonic generation in few-layer MoSe2
We show that optical second-harmonic generation (SHG) from few-layer MoSe2 can sensitively probe external symmetry perturbations such as chemical doping. The SHGs from few-layer MoSe2 are enhancedExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 27 REFERENCES
Nonlinear optics.
TLDR
In this method, non-linear susceptibility tensors are introduced which relate the induced dipole moment to a power series expansion in field strengths and the various experimental observations are described and interpreted in terms of this formalism. Expand
ACS Nano 4
  • 2695
  • 2010
The Principles of Nonlinear Optics (Wiley Interscience
  • New York,
  • 2003
ACS Nano 6
  • 74
  • 2012
I and J
Nano Letters 12
  • 55765580
  • 2012
Nature Communications 3
  • 887
  • 2012
Nature Nanotechnology 7
  • 699
  • 2012
Nature Nanotechnology 7
  • 490
  • 2012
Nature Nanotechnology 7
  • 494
  • 2012
...
1
2
3
...