First-principles simulations for excitation of currents in linear carbon chains under femtosecond laser pulse irradiation

Su, Gaoshi; Jiang, Lan; Wang, Feng; Qu, Liangti; Lu, Yongfeng

doi:10.1016/j.physleta.2016.05.022

Cited by 3 publications

(3 citation statements)

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“…Such currents in a material can be induced using high-intensity laser pulses of ultrashort time durations. Several bulk materials such as crystalline silicon, carbon chains, diamonds, CaB 6 , and so forth were investigated for these peculiar nonlinear optical properties. − In the crystalline silicon and quartz, it was shown that these materials could be transformed into highly conducting metals for a very short time because of induced currents. ,,− For example, Schiffrin et al demonstrated that the ac conductivity of fused silica reversibly increases by 18 orders of magnitude within 1 fs . The attosecond dynamics in silica reveals that it can be used as an alternative material for fast switching electronics. − A laser shape-dependent electron excitation in CaB 6 was studied by Jiao et al A linear carbon chain with odd and even number of atoms show different trends in induced currents with the application of femtosecond laser .…”

Section: Introductionmentioning

confidence: 99%

“…33−35 A laser shape-dependent electron excitation in CaB 6 was studied by Jiao et al 26 A linear carbon chain with odd and even number of atoms show different trends in induced currents with the application of femtosecond laser. 28 In 2D materials, such as phosphorene and MoS 2 , the laser-induced electron dynamics and ultrafast photonics has been studied. 36,37 Phosphorene shows remarkable nonlinear saturable absorption useful in the generation of ultrashort pulses mainly because of high nonlinear refractive index.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Several bulk materials such as crystalline silicon, carbon chains, diamonds, CaB 6 , and so forth were investigated for these peculiar nonlinear optical properties. − In the crystalline silicon and quartz, it was shown that these materials could be transformed into highly conducting metals for a very short time because of induced currents. ,,− For example, Schiffrin et al demonstrated that the ac conductivity of fused silica reversibly increases by 18 orders of magnitude within 1 fs . The attosecond dynamics in silica reveals that it can be used as an alternative material for fast switching electronics. − A laser shape-dependent electron excitation in CaB 6 was studied by Jiao et al A linear carbon chain with odd and even number of atoms show different trends in induced currents with the application of femtosecond laser . In 2D materials, such as phosphorene and MoS 2 , the laser-induced electron dynamics and ultrafast photonics has been studied. , Phosphorene shows remarkable nonlinear saturable absorption useful in the generation of ultrashort pulses mainly because of high nonlinear refractive index. − Recently, the possibility of using phosphorene as ultrafast optical switches have been discussed.…”

Section: Introductionmentioning

confidence: 99%

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Nonlinear Polarization and Low-Dissipation Ultrafast Optical Switching in Phosphorene

Shinde

Singh

2018

J. Phys. Chem. C

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Fundamental limits to the computation using silicon-based devices stimulate other emerging and viable alternatives. Manipulation of the electrical and optical properties with the ultrafast and intense electric fields offers one of such alternatives. Here, we study the interaction of high-intensity pulsed femtosecond laser of various intensities and carrier frequencies with a monolayer phosphorene using the real-time real-space time-dependent density functional theory. The nonlinear induced currents are entirely reversible but are phase-shifted compared to low-intensity lights within the period of incident laser. We observe optical Kerr effect associating the changes in the number of free charge carriers with the change in the refractive index of the material, which subsequently characterizes the material’s ability of dielectric switching. The transient changes in refractive index are reversible up to a certain threshold, suggesting that the properties can be switched on the timescale of an optical period, enabling the possibility of operating solid-state electronic devices at optical frequencies. The amount of irreversibly transferred energy into the system is found to be much smaller than that of the state-of-the-art metal–oxide field-effect transistor, thereby making phosphorene a promising candidate for high-speed electronics.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nonlinear Polarization and Low-Dissipation Ultrafast Optical Switching in Phosphorene

Shinde

Singh

2018

J. Phys. Chem. C

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Electrons dynamics control by shaping femtosecond laser pulses in micro/nanofabrication: modeling, method, measurement and application

et al. 2017

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During femtosecond laser fabrication, photons are mainly absorbed by electrons, and the subsequent energy transfer from electrons to ions is of picosecond order. Hence, lattice motion is negligible within the femtosecond pulse duration, whereas femtosecond photon-electron interactions dominate the entire fabrication process. Therefore, femtosecond laser fabrication must be improved by controlling localized transient electron dynamics, which poses a challenge for measuring and controlling at the electron level during fabrication processes. Pump-probe spectroscopy presents a viable solution, which can be used to observe electron dynamics during a chemical reaction. In fact, femtosecond pulse durations are shorter than many physical/chemical characteristic times, which permits manipulating, adjusting, or interfering with electron dynamics. Hence, we proposed to control localized transient electron dynamics by temporally or spatially shaping femtosecond pulses, and further to modify localized transient materials properties, and then to adjust material phase change, and eventually to implement a novel fabrication method. This review covers our progresses over the past decade regarding electrons dynamics control (EDC) by shaping femtosecond laser pulses in micro/nanomanufacturing: (1) Theoretical models were developed to prove EDC feasibility and reveal its mechanisms; (2) on the basis of the theoretical predictions, many experiments are conducted to validate our EDC-based femtosecond laser fabrication method. Seven examples are reported, which proves that the proposed method can significantly improve fabrication precision, quality, throughput and repeatability and effectively control micro/nanoscale structures; (3) a multiscale measurement system was proposed and developed to study the fundamentals of EDC from the femtosecond scale to the nanosecond scale and to the millisecond scale; and (4) As an example of practical applications, our method was employed to fabricate some key structures in one of the 16 Chinese National S&T Major Projects, for which electron dynamics were measured using our multiscale measurement system.

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Ab initio insights on the ultrafast strong-field dynamics of anatase TiO2

S. B.,

Lokamani,

Ramakrishna

et al. 2023

Phys. Rev. B

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First-principles simulations for excitation of currents in linear carbon chains under femtosecond laser pulse irradiation

Cited by 3 publications

References 44 publications

Nonlinear Polarization and Low-Dissipation Ultrafast Optical Switching in Phosphorene

Nonlinear Polarization and Low-Dissipation Ultrafast Optical Switching in Phosphorene

Electrons dynamics control by shaping femtosecond laser pulses in micro/nanofabrication: modeling, method, measurement and application

Ab initio insights on the ultrafast strong-field dynamics of anatase TiO2

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