CsPbBr_3 perovskite quantum dots: saturable absorption properties and passively Q-switched visible lasers

Li, Jingzhou; Dong, Hongxing; Xu, Bin; Zhang, Saifeng; Wang, Jun; Zhang, Long

doi:10.1364/prj.5.000457

Cited by 79 publications

(58 citation statements)

References 26 publications

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“…All‐optical switching can be roughly divided into three kinds of switching according to the mechanism: thermooptic‐based, optical‐limiting‐based, and SA‐based switching; the third kind is mainly discussed in this work. Saturable absorber materials are commonly used in passive Q‐switched or mode‐locked lasers, semiconductor SA mirrors, and all‐optical switches/modulators . These applications based on the SA effect primarily utilize the dependence of the material transmittance or refractive index on the incident light intensity.…”

Section: Resultsmentioning

confidence: 99%

Anisotropic Nonlinear Optical Properties of a SnSe Flake and a Novel Perspective for the Application of All‐Optical Switching

Zhang

Ouyang

Miao

et al. 2019

Advanced Optical Materials

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applications, [4,[17][18][19] and therefore have aroused enthusiasm in researchers. Due to their high crystal structure symmetry, graphene, which has been well studied, and most TMDCs exhibit an inplane isotropic feature. However, a few 2D materials with a surprisingly low lattice symmetry, such as BP, tin selenide (SnSe), [20][21][22][23] gallium telluride (GaTe), [24] and rhenium disulfide (ReS 2 ), [17,[25][26][27][28] can also show significant anisotropic in-plane optical, electrical, and thermal properties. [17,20,[23][24][25]28] For instance, the charge carrier mobility, [18,29] photoemission, [30] and thermoelectric figure of merit (ZT) [31][32][33] of BP along the armchair direction are larger than those in the zigzag direction. In addition to anisotropy, BP also has a tunable thickness-dependent direct bandgap ranging from 0.3 to 1.5 eV, [12,13] filling the space between zero-gap graphene [1,2] and large-gap (1-2.5 eV) TMDCs. [4,34] Additionally, BP has a high carrier mobility (≈10 3 cm 2 V −1 s −1 ) [18] compared with TMDCs (10-200 cm 2 V −1 s −1 ). [4] Therefore, BP has been viewed as an alluring and ideal candidate for applications in field-effect transistors (FETs), [18,35] fast-response optical switches, [36] photovoltaic devices, [37] mid-infrared polarizers, and polarization sensors, [29] owing to its distinguished physical properties. Although BP exhibits great potential for various anisotropic optical, electronic, and optoelectronic high-performance devices, it degrades within a short time when exposed to oxygen and water vapor in air, causing difficulties in practical applications. Consequently, it is highly important to explore BP-like materials with appropriate properties including a narrow bandgap, high carrier mobility, air stability, and low cost.Regarded as a promising alternative to BP, SnSe also consists of a puckered honeycomb layered crystal structure similar to that in BP, exhibiting highly anisotropic valence bands, [23] a crystal-orientation-dependent high charge carrier mobility (≈10 3 cm 2 V −1 s −1 ), [38] and linear optical absorption. [39] Additionally, due to the narrow-bandgap semiconductor nature, the indirect bandgap of SnSe is ≈0.9 eV, [39][40][41][42] whereas its direct bandgap is ≈1.3 eV, [40,42] leading to optical transitions of SnSe The deceptively simple tin selenide (SnSe) film has emerged as an appealing 2D material with a narrow bandgap, high charge carrier mobility, and significant thermoelectric figure of merit. In particular, compared with most commonly investigated 2D materials, SnSe with a puckered honeycomb structure possesses a lower lattice symmetry, resulting in prominent in-plane anisotropy. Herein, with polarization-dependent Raman spectroscopy and polarization-dependent nonlinear absorption measurements, pronounced polarization-dependent nonlinear optical properties of a SnSe flake are demonstrated originating from the anisotropic optical transition probability of SnSe, which is confirmed by ultrafast polarization-dependent pump-probe experiments. Furt...

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Section: Resultsmentioning

confidence: 99%

Anisotropic Nonlinear Optical Properties of a SnSe Flake and a Novel Perspective for the Application of All‐Optical Switching

Zhang

Ouyang

Miao

et al. 2019

Advanced Optical Materials

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“…Furthermore, the realization of QDs lasing by using the versatility method including photolithography and others are possible . Addition to one‐photon pumped lasing of QDs, the large multiphoton absorption and PL in CsPbBr 3 NCs, in which large two‐photon absorption (2PA) cross‐section up to ≈1.2 × 10 5 GM was determined in 9 nm CsPbBr 3 perovskite NCs, makes perovskite QDs being considered as a prospective medium to obtain frequency upconversion lasing. To date, there are several groups reported two‐photon pumped (2PP) ASE/lasing in CsPbBr 3 QDs, and three‐photon pumped stimulated emission in CsPbBr 3 NCs .…”

Section: Different Dimensional Metal Halide Perovskites For Lasingmentioning

confidence: 99%

Recent Progress in Metal Halide Perovskite Micro‐ and Nanolasers

Wei

Liang

et al. 2019

Advanced Optical Materials

104

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Lead halide perovskites are considered as very promising photovoltaic materials due to their tunable direct bandgaps, large absorption coefficients, long carrier diffusion lengths, and ultralow trap state densities, etc. With these unique properties, the lead halide perovskites have also demonstrated great potential for use as semiconductor gain materials. In this review, a snapshot on the recent advances of lead halide perovskite micro‐ and nanolasers is given. The dependence of lasing performance on the perovskite dimensionality, crystal size, and operation temperature is systematically discussed. Furthermore, the development of continuous wave (cw) pumped perovskite lasers and lead‐free perovskite lasers is also summarized. In the final section, the challenges and future prospects of metal halide perovskite lasers are provided. These pieces of knowledge would help advancing the development of perovskite on‐chip coherent light sources.

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“…The saturation intensity was estimated to be 9.01 and 81.0 GW cm −2 . In addition, the nonlinear saturable absorption responses of CsPbBr 3 QDs also were studied by using the open-aperture Z-scan system (see Figure 4E) [150]. The result showed a nonlinear absorption coefficient of -35 × 10 −2 cm GW −1 and a saturation intensity of ~11 MW cm −2 .…”

Section: Saturable Absorbers With Bandgap Between 03 and 3 Evmentioning

confidence: 98%

“…With CdTe/CdS QDs as SAs, the pulse energy obtained was 190, 320 and 210 nJ for 607, 640, and 721 nm, respectively [159]. For a pulsed laser operating at 522 nm, a pulse energy of 94 nJ was reported based on the saturable absorption of CsPbBr 3 perovskite QDs [150]. One year later, the pulse energy was improved to 180 nJ by inserting a CdTe/CdS thin film into the laser cavity [160].…”

Section: Tmds Qds and Bpmentioning

confidence: 99%

“…These results prove that TMDs have strong saturable absorption characteristics at visible wavelengths and can be used to achieve pulsed operation in visible laser wavelengths. Since 1996, the nonlinear saturable absorption properties of QDs including CdSe QDs, CdTe/CdS CQDs, and CsPbBr 3 QDs in the visible spectral range have been extensively studied and reported[131,150,[158][159][160]. For example, with the openaperture Z-scan system at 515 nm, the saturable absorption responses of CdTe/CdS CQDs with the diameters of 3.0 nm (bandgap of 2.42 eV) and 3.5 nm (bandgap of 2.17 eV) were measured by Li et al…”

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confidence: 99%

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Visible-wavelength pulsed lasers with low-dimensional saturable absorbers

et al. 2020

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Abstract The recent renaissance in pulsed lasers operating in the visible spectral region has been driven by their significant applications in a wide range of fields such as display technology, medicine, microscopy, material processing, and scientific research. Low-dimensional nanomaterials as saturable absorbers are exploited to create strong nonlinear saturable absorption for pulse generation at visible wavelengths due to their absorption peaks located in visible spectral region. Here we provide a detailed overview of visible-wavelength pulsed lasers based on low-dimensional nanomaterials, covering the optical properties and various integration strategies of these nanomaterials saturable absorbers, and their performance from solid-state as well as fiber pulsed lasers in the visible spectral range. This emerging application domain will undoubtedly lead to the rapid development of visible pulsed lasers.

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CsPbBr_3 perovskite quantum dots: saturable absorption properties and passively Q-switched visible lasers

Cited by 79 publications

References 26 publications

Anisotropic Nonlinear Optical Properties of a SnSe Flake and a Novel Perspective for the Application of All‐Optical Switching

Anisotropic Nonlinear Optical Properties of a SnSe Flake and a Novel Perspective for the Application of All‐Optical Switching

Recent Progress in Metal Halide Perovskite Micro‐ and Nanolasers

Visible-wavelength pulsed lasers with low-dimensional saturable absorbers

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