Structural, optical and femtosecond third-order nonlinear optical properties of LiNbO 3  thin films

Tumuluri, Anil; Moram, Sree Satya Bharati; Rao, S. Venugopal; Raju, K. C. James

doi:10.1016/j.materresbull.2017.06.029

Cited by 33 publications

(11 citation statements)

References 42 publications

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“…Therefore, we infer that 2PA observed in Z-scan (at 1032 nm) could be via intermediate virtual states to defect states, as transitions from VB to the CB terminate at various defect states lying between CB and VB. 27 However, excitation-dependent PL studies also rule out the possibility of 3PA, which is most likely possible at or above 1350 nm in this case. We suspect that, beyond normal defect states that exist in these bulk crystals, the in-plane heterostructures present in Cu 0.33 In 1.30 P 2 S 6 also may cause significant bulk irregularities in electronic and mechanical structures of the crystal.…”

mentioning

confidence: 76%

“…Therefore, the possible route for the occurrence of 2PA could be via intermediate virtual states to defect states. 27 The extracted value of the 2PA coefficient was found to be 10.3 cm/GW at 17.1 GW/cm 2 , which is 21 times larger than single crystalline Si (0.5 cm/GW) at near-infrared wavelengths. 28,29 The 2PA coefficient (β 2 ) of the Cu 0.33 In 1.30 P 2 S 6 crystal is found to be an order of magnitude larger compared to commonly used 2PA crystals and well-known semiconductors like LiTaO 3 (2 cm/GW at 800 nm), 30 KTiOPO 4 (1.8 cm/GW at 800 nm), 31 LiNbO 4 (3.5 cm/GW at 388 nm), 32 CdTe (0.02 cm/GW at 1300 nm), 33 ZnTe (4.5 cm/GW at 1060 nm), 34 and GaSe (6.3 cm/GW at 1060 nm).…”

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confidence: 90%

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Ultrafast Nonlinear Absorption and Second Harmonic Generation in Cu_0.33In_1.30P₂S₆ van der Waals Layered Crystals

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Noor

et al. 2022

J. Phys. Chem. Lett.

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The advancement of ultrafast photonics and optoelectronic devices necessitates the exploration of new materials with optical and chemical stability to implement practical applications. Layered quaternary metal-thio/selenophosphate has attracted much interest over the past few years. Ferroelectric CuInP 2 S 6 (CIPS) is an emerging material that belongs to this family. When synthesized with Cu deficiencies, CIPS forms self-assembled in-plane heterostructures, which in turn exhibit properties that are both compositionally and thermally dependent. These characteristics can be explored for applications in nonlinear optoelectronic and photonic devices. Herein, we study the second and third order nonlinear optical behavior of Cu 0.33 In 1.30 P 2 S 6 bulk heterostructure. We observed large two photon induced nonlinear absorptions and self-defocusing at 1032 nm pulsed laser excitation using the Z-scan technique. Furthermore, we identified a polarization-dependent second harmonic signal and determined the laser-induced optical damage threshold. Our observations allow for the designing of optoelectronic and ultrafast photonic devices based on these materials.

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confidence: 76%

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confidence: 90%

Ultrafast Nonlinear Absorption and Second Harmonic Generation in Cu_0.33In_1.30P₂S₆ van der Waals Layered Crystals

Mushtaq

Clink

Noor

et al. 2022

J. Phys. Chem. Lett.

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“…Today, with the rapid development of optoelectronic technology, the functional demands for NLO materials are increasing. Solution-processed flexibility makes chiral hybrid metal halides suitable for versatile miniaturized and integrated optical design on arbitrary substrate . The development of chiral hybrid metal halides, a new type of NLO materials, promotes the evolution of nonlinear optoelectronic information technology and material science.…”

Section: Discussionmentioning

confidence: 99%

Strong Second- and Third-Harmonic Generation in 1D Chiral Hybrid Bismuth Halides

et al. 2021

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Breaking the symmetry of a crystal structure can enable even-order nonlinear activities, including second-harmonic generation (SHG). The emerging chiral hybrid organic–inorganic metal halides feature unique optical and electronic properties and flexible crystal structures, making them a class of promising nonlinear optical materials. However, their nonlinear response performances are currently inferior to traditional nonlinear crystals, because of the lack of research on resonant enhancement and third-harmonic generation (THG). Herein, we designed chiral hybrid bismuth halides with naturally nonsymmetrical structure to enable SHG. Simultaneously, these chiral compounds preserve 1D crystal structures to create strong free exciton, broad self-trapped exciton (STE), and discrete band energy levels, which facilitate the resonant enhancement of SHG and THG susceptibilities. These new chiral films showcase superior effective SHG susceptibility (χ(2) ∼ 130.5 pm V–1 at an interesting wavelength of 1550 nm), exceeding that of the reference, a commercial LiNbO3 (χ(2) ∼ 83.4 pm V–1) single-crystal film. Furthermore, their THG intensities are even higher than their SHG intensities, with effective THG susceptibility (χ(3)) being ∼9.0 × 106 pm2 V–2 at 1550 nm (37 times that of the reference monolayer WS2). Their high SHG and THG performances indicate the promising future of these 1D chiral hybrid bismuth halides toward nonlinear optical applications.

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“…Since the band gap of SnS nanosheets (1.6 eV) is slightly larger than the energy of excitation photon (1.55 eV), the saturable absorption response arises from optical transitions and band filling of edge states. 54 On the other hand, absence of any signal in the Z-scan measurement for pure acetone (see Supplementary Fig. 3) ensures that saturable absorption is solely the property of layered SnS.…”

Section: Saturable Absorptionmentioning

confidence: 99%

Liquid exfoliation of electronic grade ultrathin tin(II) sulfide (SnS) with intriguing optical response

et al. 2020

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Two-dimensional (2D) tin(II) monosulfide (SnS) with strong structural anisotropy has been proven to be a phosphorene analog. However, difficulty in isolating a very thin layer of SnS poses challenges in practical utilization. Here, we prepare ultrathin SnS via liquid-phase exfoliation. With transmission electron microscopy, we identify the buckled structure of 2D SnS. We employ temperature dependent Raman spectroscopy to elucidate electron-phonon interactions, which reveals a linear phonon shifts. The active Raman modes of ultrathin SnS exhibit higher sensitivity to temperature than other 2D materials. Moreover, we demonstrate strong light-matter interaction in ultrathin SnS using Z-scan and ultrafast spectroscopy. Rich exciton-exciton and coherent exciton-photon interactions arising from many-particle excited effects in ultrathin SnS eventually enhances the nonlinear optical properties. Our findings highlight the prospects for the synthesis of ultrathin anisotropic SnS towards the betterment of thermoelectric and photonic devices.npj 2D Materials and Applications (2020) 4:1 ; https://doi.

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Structural, optical and femtosecond third-order nonlinear optical properties of LiNbO 3 thin films

Cited by 33 publications

References 42 publications

Ultrafast Nonlinear Absorption and Second Harmonic Generation in Cu_0.33In_1.30P₂S₆ van der Waals Layered Crystals

Ultrafast Nonlinear Absorption and Second Harmonic Generation in Cu_0.33In_1.30P₂S₆ van der Waals Layered Crystals

Strong Second- and Third-Harmonic Generation in 1D Chiral Hybrid Bismuth Halides

Liquid exfoliation of electronic grade ultrathin tin(II) sulfide (SnS) with intriguing optical response

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Structural, optical and femtosecond third-order nonlinear optical properties of LiNbO 3 thin films

Cited by 33 publications

References 42 publications

Ultrafast Nonlinear Absorption and Second Harmonic Generation in Cu0.33In1.30P2S6 van der Waals Layered Crystals

Ultrafast Nonlinear Absorption and Second Harmonic Generation in Cu0.33In1.30P2S6 van der Waals Layered Crystals

Strong Second- and Third-Harmonic Generation in 1D Chiral Hybrid Bismuth Halides

Liquid exfoliation of electronic grade ultrathin tin(II) sulfide (SnS) with intriguing optical response

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Ultrafast Nonlinear Absorption and Second Harmonic Generation in Cu_0.33In_1.30P₂S₆ van der Waals Layered Crystals

Ultrafast Nonlinear Absorption and Second Harmonic Generation in Cu_0.33In_1.30P₂S₆ van der Waals Layered Crystals