Third order nonlinear optical property of Bi_2Se_3

Lu, Shunbin; Zhao, Chujun; Zou, Yanhong; Chen, Shuqing; Chen, Yu; Liu, Ying; Zhang, Han; Wen, Shuangchun; Tang, Dingyuan

doi:10.1364/oe.21.002072

Cited by 271 publications

(122 citation statements)

References 29 publications

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“…), [ 2 ] and topological insulators (Bi 2 Se 3 , Bi 2 Te 3 , etc.) [ 3 ] with outstanding electronic and optical properties [4][5][6][7][8] have been widely used in energy storage device, transistor, photodetectors, and electroluminescent devices. [9][10][11][12] Furthermore, some of these nanomaterials are also used as optical absorber for ultrafast photonics, such as passive Q-switcher, optical limiter, and mode locker, because of their broadband nonlinear optical response if under high power laser illumination.…”

Section: Introductionmentioning

confidence: 99%

Solvothermal Synthesis and Ultrafast Photonics of Black Phosphorus Quantum Dots

Wang

Guo

et al. 2016

Advanced Optical Materials

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354

105

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active photo electronic response, [18][19][20][21][22] with some emerging applications such as transistors and photodetectors devices. [23][24][25][26][27] Meanwhile, BP is used in vapor sensor, drug delivery, and cellular tracking systems because of its sensitivity and low toxicity. [28][29][30][31] Mechanical and liquid exfoliation methods have been adopted to prepare BP nanosheets with different numbers of layers and sizes. [32][33][34] Due to thickness-dependent bandgap structure of BP which is tunable ranged from 0.3 eV (bulk) to 1.5 eV (monolayer) [ 26,35,36 ] and anomalous anisotropy, [ 37 ] BP nanosheets show nonlinear saturable absorption properties, [ 38 ] and used as the saturable absorber for fi ber lasers. [ 39,40 ] However, the lateral size and thickness of these BP nanosheets is hardly to be controlled by the liquid exfoliation methods, which limits the investigations of the nonlinear optical properties of the BP with special size.Recently, ultrasmall BP nanosheets (also called as BP quantum dots, BPQDs) were prepared from the bulk BP crystal using liquid exfoliation methods established by Zhang's group and our group. [ 41,42 ] BPQDs exhibit unique electronic and optical properties in association with the quantum confi nement and edge effects. [ 43 ] However, there remains uninvestigated on the light-matter interaction between laser and BPQDs, and the ultrafast and nonlinear optical properties of BPQDs have not yet been studied.In this paper, we describe a solvothermal method in N -methyl-2-pyrrolidone (NMP) to synthesize ultrasmall BPQDs Ultrasmall black phosphorus quantum dots (BPQDs) with an average size of 2.1 ± 0.9 nm are synthesized by using a solvothermal method in a N -methyl-2-pyrrolidone solution. Verifi ed by femto-second laser Z-scan measurement, BPQDs exhibit excellent nonlinear optical response with a modulation depth of about 36% and a saturable intensity of about 3.3 GW cm −2 . By using BPQDs as optical saturable absorber, the ultrashort pulse with a pulse duration of about 1.08 ps centered at a wavelength of 1567.5 nm is generated in mode-locked fi ber laser. These results suggest that BPQDs may be developed as another kind of promising nanomaterial for ultrafast photonics.

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Section: Introductionmentioning

confidence: 99%

Solvothermal Synthesis and Ultrafast Photonics of Black Phosphorus Quantum Dots

Wang

Guo

et al. 2016

Advanced Optical Materials

Self Cite

354

105

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“…Shortly after that, Zhao et al presented the achievement of ultrashort pulse generation in the fibre laser mode locking by the TMD-based SA [33]. Further investigations with the Z-scan technique showed that the TMDs also possess large nonlinear refractive index [34]. Thus, the TMDs could serve as both the high nonlinear photonic device and the SA in the laser system.…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotubes for ultrafast fibre lasers

et al. 2016

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Carbon nanotubes (CNTs) possess both remarkable optical properties and high potential for integration in various photonic devices. We overview, here, recent progress in CNT applications in fibre optics putting particular emphasis on fibre lasers. We discuss fabrication and characterisation of different CNTs, development of CNTbased saturable absorbers (CNT-SA), their integration and operation in fibre laser cavities putting emphasis on stateof-the-art fibre lasers, mode locked using CNT-SA. We discuss new design concepts of high-performance ultrafast operation fibre lasers covering ytterbium (Yb), bismuth (Bi), erbium (Er), thulium (Tm) and holmium (Ho)-doped fibre lasers.

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“…Topological surface states are conducting, spin-locked, and protected by symmetry from backscattering by nonmagnetic impurities [10][11][12][13]. Bi 2 Se 3 is the prototypical TI (albeit doped in the asgrown samples), and has been intensively studied for its electronic, thermoelectric [14,15], and optical properties [16][17][18][19][20][21][22][23][24]. It has been proposed [25] that two-color injection currents can be injected by a laser pump and its second harmonic, and this was observed [26] in Bi 2 Se 3 thin films using a terahertz (THz) probe.…”

Section: Introductionmentioning

confidence: 99%

Identification of photocurrents in topological insulators

Bas¹,

Muniz²,

Babakiray³

et al. 2016

Opt. Express

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Optical injection and detection of charge currents can complement conventional transport and photoemission measurements without the necessity of invasive contact that may disturb the system being examined. This is a particular concern for the surface states of a topological insulator. In this work one-and two-color sources of photocurrents are examined in epitaxial, thin films of Bi2Se3. We demonstrate that optical excitation and terahertz detection simultaneously captures one-and twocolor photocurrent contributions, as previously not required in other material systems. A method is devised to isolate the two components, and in doing so each can be related to surface or bulk excitations through symmetry. This strategy allows surface states to be examined in a model system, where they have independently been verified with angle-resolved photoemission spectroscopy.

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Third order nonlinear optical property of Bi_2Se_3

Cited by 271 publications

References 29 publications

Solvothermal Synthesis and Ultrafast Photonics of Black Phosphorus Quantum Dots

Solvothermal Synthesis and Ultrafast Photonics of Black Phosphorus Quantum Dots

Carbon nanotubes for ultrafast fibre lasers

Identification of photocurrents in topological insulators

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