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Device and method for generating attosecond pulse by using multi-color field and nano-tip action

A nano-tip, pulse technology, applied in nonlinear optics, instruments, optics, etc., can solve the problem of not having supercontinuum, and achieve the effect of improving pulse intensity

Inactive Publication Date: 2019-03-26
SHANTOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Although the existing technology can generate high-order harmonics, its harmonic spectrum is discrete and does not have the properties of a supercontinuum, and the resulting attosecond pulse chain is not a single attosecond pulse as we expect

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  • Device and method for generating attosecond pulse by using multi-color field and nano-tip action
  • Device and method for generating attosecond pulse by using multi-color field and nano-tip action

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Embodiment Construction

[0018] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0019] refer to figure 1 , the specific embodiment adopts the following technical solutions: a device for generating attosecond pulses by using the multicolor field and the nano-tip, including a laser 1, a reflector 2, a cluster 3, an electrostatic generating field 4, a nano-tip 5 and an aluminum foil 6, and the laser 1. The polarized light generated by 1 adjusts the optical path through the reflector 2, and the two beams of linearly polarized light are adjusted to the same propagation direction and polarization direction through the beam collector 3. The nano-tip 5 is placed under two strong short laser pulses and an electrostatic field. The laser The strong linear polarized light generated by 1 interacts with the metal nano-tip 5 to generate hig...

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Abstract

The invention discloses a device and method for generating an attosecond pulse by using a multi-color field and a nano-tip action. Laser devices, a reflector, a buncher, an electrostatic generation field, a nano tip and an aluminum foil are arranged. The light paths of polarized laser generated by the laser devices are adjusted by a reflector; the buncher adjusts the two beams of linear polarizedlight to be in a same propagation direction and polarization direction. The nano tip is arranged under two strong short laser pulses and an electrostatic field. Strong linearly polarized light generated by the laser devices acts with the metal nano tip to generate higher harmonics; and then the aluminum foil is used for screening effective frequency components to form a single attosecond pulse. According to the invention, two linearly polarized electrical fields with the parallel polarization directions in a parallel two-color state and one electrostatic field with the proper intensity are employed; and the nano tip is arranged in the fields to obtain higher harmonics including one super-continuous spectrum, so that a pure isolated attosecond pulse is obtained with the pulse width of 120 attoseconds.

Description

technical field [0001] The present invention relates to the technical field of attosecond pulses, in particular to a device and method for generating attosecond pulses by using the interaction of multi-color fields and nano-tips. Background technique [0002] Light is a very common and important physical phenomenon, and a flash process can be described as a light pulse. For coherent light, due to the coherence of each spectral component (light of different colors) contained in it, the phase difference of each component is fixed, so pulse modulation and compression can be realized, thereby obtaining coherent light pulses with extremely short duration , breaking through the limitations of mechanical and electronic shutters, and becoming a real carrier for creating extreme physical time scales. As soon as the laser appeared, people couldn't wait to shorten the pulse. On the one hand, it is the interest in the study of ultrafast phenomena, and on the other hand, it is the pursu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/35
CPCG02F1/353G02F1/354
Inventor 杨玮枫杨士栋
Owner SHANTOU UNIV
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