Ultrafast Coherent Control of Spin Precession Motion by Terahertz Magnetic Pulses

Nakajima, Makoto; Yamaguchi, Keita; Suemoto, Tohru

doi:10.12693/aphyspola.121.343

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…By adjusting the delay time of the THz pulse pair, it is possible to selectively enhance or diminish a certain spin mode. Then, these authors demonstrated the energy transfer between spin waves and photon spin systems in dual-pulse coherent control [184]. A single pulse to achieve coherent control is based on the birefringence effect of the material [185].…”

Section: Spintronics Metasurfacementioning

confidence: 99%

A Review of THz Modulators with Dynamic Tunable Metasurfaces

et al. 2019

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Terahertz (THz) radiation has received much attention during the past few decades for its potential applications in various fields, such as spectroscopy, imaging, and wireless communications. To use terahertz waves for data transmission in different application systems, the efficient and rapid modulation of terahertz waves is required and has become an in-depth research topic. Since the turn of the century, research on metasurfaces has rapidly developed, and the scope of novel functions and operating frequency ranges has been substantially expanded, especially in the terahertz range. The combination of metasurfaces and semiconductors has facilitated both new opportunities for the development of dynamic THz functional devices and significant achievements in THz modulators. This paper provides an overview of THz modulators based on different kinds of dynamic tunable metasurfaces combined with semiconductors, two-dimensional electron gas heterostructures, superconductors, phase-transition materials, graphene, and other 2D material. Based on the overview, a brief discussion with perspectives will be presented. We hope that this review will help more researchers learn about the recent developments and challenges of THz modulators and contribute to this field.

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Section: Spintronics Metasurfacementioning

confidence: 99%

A Review of THz Modulators with Dynamic Tunable Metasurfaces

et al. 2019

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Magnetic pulses enable multidimensional optical spectroscopy of dark states

Oviedo-Casado

Šanda

Hauer

et al. 2020

The Journal of Chemical Physics

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The study and manipulation of low dipole moment quantum states have been challenging due to their inaccessibility by conventional spectroscopic techniques. Controlling the spin in such states requires unfeasible strong magnetic fields to overcome typical decoherence rates. However, the advent of terahertz technology and its application in magnetic pulses opens up a new scenario. In this article, we focus on an electron–hole pair model to demonstrate that it is possible to control the precession of the spins and to modify the transition rates to different spin states. Enhancing transitions from a bright state to a dark state with different spins means that the latter can be revealed by ordinary spectroscopy. We propose a modification of the standard two-dimensional spectroscopic scheme in which a three pulse sequence is encased in a magnetic pulse. Its role is to drive transitions between a bright and a dark spin state, making the latter susceptible to spectroscopic investigation.

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Ultrafast Coherent Control of Spin Precession Motion by Terahertz Magnetic Pulses

Cited by 2 publications

References 11 publications

A Review of THz Modulators with Dynamic Tunable Metasurfaces

A Review of THz Modulators with Dynamic Tunable Metasurfaces

Magnetic pulses enable multidimensional optical spectroscopy of dark states

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