How Long to Read Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces

How Long Does it Take to Read Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces?

It takes the average reader 2 hours and 14 minutes to read Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces by Yi Luo

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Description

Laser-induced electron emission from nanostructures offers a platform to coherently control electron dynamics in ultrashort spatiotemporal scales, making it important to both fundamental research and a broad range of applications, such as to ultrafast electron microscopy, diffraction, attosecond electronics, strong-field nano-optics, tabletop particle accelerators, free electron lasers, and novel nanoscale vacuum devices. This thesis analytically studies nonlinear ultrafast photoelectron emission from biased metal surfaces, by solving the time-dependent Schrodinger equation exactly. Our study provides better understanding of the ultrafast control of electrons and offers useful guidance for the future design of ultrafast nanoelectronics.First, we present an analytical model for photoemission driven by two-color laser fields. We study the electron energy spectra and emission current modulation under various laser intensities, frequencies, and relative phase between the two lasers. We find strong modulation for both the energy spectra and emission current (with a modulation depth up to 99%) due to the interference effect of the two-color lasers. Using the same input parameter, our theoretical prediction for the photoemission current modulation depth (93.9%) is almost identical to the experimental measurement (94%). Next, to investigate the role of dc field, we construct an analytical model for two-color laser induced photoemission from dc biased metal surfaces. We systematically examine the combined effects of a dc electric field and two-color laser fields. We find the strong modulation in two-color photoemission persists even with a strong dc electric field. In addition, the dc field opens up more tunneling emission channels and thus increases the total emission current. Application of our model to time-resolved photoelectron spectroscopy is also demonstrated, showing the dynamics of the n-photon excited states depends strongly on the applied dc field.We then propose to utilize two lasers of the same frequency to achieve the interference modulation of photoemission by their relative phase. This is motivated by the easier access to single-frequency laser pairs than two-color lasers in experiments. We find a strong current modulation (> 90%) can be achieved with a moderate ratio of the laser fields (

How long is Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces?

Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces by Yi Luo is 133 pages long, and a total of 33,649 words.

This makes it 45% the length of the average book. It also has 41% more words than the average book.

How Long Does it Take to Read Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces Aloud?

The average oral reading speed is 183 words per minute. This means it takes 3 hours and 3 minutes to read Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces aloud.

What Reading Level is Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces?

Theoretical Modeling of Ultrafast Optical-field Induced Photoelectron Emission from Biased Metal Surfaces is suitable for students ages 10 and up.

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