Rapid visualization of grain boundaries in monolayer MoS2 by multiphoton microscopy

Karvonen, Lasse; Säynätjoki, Antti; Huttunen, Mikko J.; Autere, Anton; Amirsolaimani, Babak; Li, Shisheng; Norwood, Robert A.; Peyghambarian, N.; Lipsanen, Harri; Eda, Goki; Kieu, Khanh; Sun, Zhipei

doi:10.1038/ncomms15714

Cited by 130 publications

(148 citation statements)

References 46 publications

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“…Both THG and FWM are originated from the third‐order susceptibility χ (3) . THG has been widely investigated in MoS 2 , WS 2 , WSe 2 ,and MoSe 2 . In contrast to SHG, THG does not require the absence of the inversion symmetry and can be observed both in odd‐ and even‐layers.…”

Section: Nlo Processes In Tmdsmentioning

confidence: 99%

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Nonlinear optics of two‐dimensional transition metal dichalcogenides

Wen

Gong

2019

InfoMat

158

149

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Nonlinear optics (NLO) of transition metal dichalcogenides (TMDs) is promising for the on‐chip photonic and optoelectronic applications. In this review, we will survey the current progress of NLO in TMDs. First, we will brief the basic theory of the NLO in TMDs. Second, several important nonlinear processes in TMDs such as harmonic generation, four‐wave mixing, saturable absorption, and two‐photon absorption will be presented and their potential applications are also discussed. Third, the main strategies to tune, modulate, and enhance the NLO in TMDs are reviewed, including the excitonic effect, symmetry modulation, optical cavity enhancement, valley selection, edge state, and material phase. Finally, we give an outlook regarding some important issues and directions of NLO in TMDs.

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Section: Nlo Processes In Tmdsmentioning

confidence: 99%

“…THG is useful in the frequency conversion, as well as the grain boundaries recognition. Karvonen et al demonstrated that the contrast between the boundaries and the grains in THG imaging was much higher than conventional SHG, Raman and PL mapping, making it a powerful tool in fast and sensitive characterization of 2D materials …”

Section: Nlo Processes In Tmdsmentioning

confidence: 99%

Nonlinear optics of two‐dimensional transition metal dichalcogenides

Wen

Gong

2019

InfoMat

158

149

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“…Kumbhakar et al studied the multiphoton absorption properties of hBN by the z ‐scan technique, and later reported a significant enhancement in hBN–graphene oxide heterostructure compared with the bare hBN . Second‐harmonic generation (SHG) is a typical second‐order nonlinear optical process, which has been widely observed in 2D materials, such as noncentrosymmetric TMDCs and hBN, while for BP, SHG is absent due to its centrosymmetric crystal structure. Only third‐order nonlinearity is permitted, such as third‐harmonic generation (THG) and four wave mixing (FWM).…”

Section: Optical Properties Of Anisotropic 2d Materialsmentioning

confidence: 99%

The Optical Properties and Plasmonics of Anisotropic 2D Materials

Wang

Zhang

Huang

et al. 2019

Advanced Optical Materials

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In the fast growing 2D materials family, anisotropic 2D materials, with their intrinsic in‐plane anisotropy, exhibit a great potential in optoelectronics. One such typical material is black phosphorus (BP), with a layer‐dependent and highly tunable bandgap. Such intrinsic anisotropy adds a new degree of freedom to the excitation, detection, and control of light. Particularly, hyperbolic plasmons with hyperbolic q‐space dispersion are predicted to exist in BP films, where highly directional propagating polaritons with divergent densities of states are hosted. Combined with a tunable electronic structure, such natural hyperbolic surfaces may enable a series of exotic applications in nanophotonics. Herein, the anisotropic optical properties and plasmons (especially hyperbolic plasmons) of BP are discussed. In addition, other possible 2D material candidates (especially anisotropic layered semimetals) for hyperbolic plasmons are examined. This review may stimulate further research interest in anisotropic 2D materials and fully unleash their potential in flatland photonics.

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“…In addition to biomedical imaging, MPM can be used in material characterization. Two-and three-photon imaging of thin layers of graphene [6], black phosphorous [7], and molybdenum disulphide [8] illustrates properties of these thin layers that have not been seen before. Electro-optical polymer based devices are another area of study which has been taking advantage of the MPM as a powerful characterization method [9].…”

Section: Introductionmentioning

confidence: 99%

All-reflective multiphoton microscope

et al. 2017

Self Cite

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Abstract:We present the design, construction, and characterization of a multiphoton microscope that uses reflective elements for beam shaping and steering. This compact all reflective design removes the adverse effects of dispersion on laser pulse broadening as well as chromatic aberration in the focusing of broadband and multicolored laser sources. The design of this system is discussed in detail, including aberrations analysis via ray-tracing simulation and opto-mechanical design. The resolution of this mirror based all-reflective microscope is characterized using fluorescent microbeads. The performance of the system at multiple wavelengths is investigated along with some potential multiphoton imaging and writing applications. Nelson, and S. Pané, "Hybrid Helical Magnetic Microrobots Obtained by 3D Template-Assisted Electrodeposition," Small 10(7), 1284-1288 (2014). 15. T. Gissibl, S. Thiele, A. Herkommer, and H. Giessen, "Two-photon direct laser writing of ultracompact multilens objectives," Nat. Photonics 10(8), 554-560 (2016). 73-76 (1990). 17. E. E. Hoover and J. A. Squier, "Advances in multiphoton microscopy technology," Nat. Photonics 7(2), 93-101 (2013). 18. K. Kieu, S. Mehravar, R. Gowda, R. A. Norwood, and N. Peyghambarian, "Label-free multi-photon imaging using a compact femtosecond fiber laser mode-locked by carbon nanotube saturable absorber," Biomed. Opt. Express 4(10), 2187-2195 (2013). 19. N. G. Horton and C. Xu, "Dispersion compensation in three-photon fluorescence microscopy at 1,700 nm,"Biomed. Opt. Express 6(4), 1392-1397 (2015). 20. I. D. Tullis, S. M. Ameer-Beg, P. R. Barber, V. Rankov, and B. Vojnovic, "Mapping femtosecond pulse front distortion and group velocity dispersion in multiphoton microscopy," Proc. SPIE 6089, 60890Y (2006). 21. W. Wang, Y. Liu, P. Xi, and Q. Ren, "Origin and effect of high-order dispersion in ultrashort pulse multiphoton microscopy in the 10 fs regime," Appl. Opt. 49(35), 6703-6709 (2010). 22. M. D. Young, J. J. Field, K. E. Sheetz, R. A. Bartels, and J. Squier, "A pragmatic guide to multiphoton microscope design," Adv. Opt. Photonics 7(2), 276-378 (2015). 23. J. Y. Yu, C. S. Liao, Z. Y. Zhuo, C. H. Huang, H. C. Chui, and S. W. Chu, "A diffraction-limited scanning system providing broad spectral range for laser scanning microscopy," Rev.

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Rapid visualization of grain boundaries in monolayer MoS2 by multiphoton microscopy

Cited by 130 publications

References 46 publications

Nonlinear optics of two‐dimensional transition metal dichalcogenides

Nonlinear optics of two‐dimensional transition metal dichalcogenides

The Optical Properties and Plasmonics of Anisotropic 2D Materials

All-reflective multiphoton microscope

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