All-Optical Coherent Control of Ultrafast Injection Photocurrent in Multilayer Rhenium Disulfide Under Two-Color Light Excitation

IF 9.8 1区 物理与天体物理 Q1 OPTICS
Leidong Xing, Xueqin Cao, Fan Wang, Yayan Xi, Guorong Xu, Xinyi Xue, Yanqing Ge, Yuanyuan Huang, Xinlong Xu
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引用次数: 0

Abstract

Quantum coherence by electronic quantum interference (QI) is significant to generate macroscopic photocurrent without heterostructures in both bulk and low-dimensional materials. However, the coherent injection photocurrent by QI in low-dimensional materials can be veiled by other linear or nonlinear optical effects. Herein, the coherent ultrafast injection photocurrent is investigated by coherent terahertz (THz) wave generation in multilayer rhenium disulfide (ReS2) at the nanometer scale under two-color light excitation. It is observed that the THz radiation can be controlled by adjusting the relative phase between the two-color lights under normal incidence. The experimental results demonstrate that the THz radiation of ReS2 is ascribed to the injection photocurrent from the electronic coherence of QI effect. However, the injection photocurrent is veiled by the nonlinear polarization, shift current, and drift current under oblique incidence. A method is proposed to isolate the pure injection photocurrent from these optical responses, based on the THz amplitude dependences on the pump power, incident polarization angle, and the relative phase between the two-color lights. This work not only provides an all-optical non-contact method for understanding the quantum photocurrent in ReS2 but also promotes the quantum coherent control for solid-state quantum devices.

Abstract Image

双色光激励下多层二硫化铼超快注入光电流的全光相干控制
电子量子干涉(QI)的量子相干性对于在体维和低维材料中产生无异质结构的宏观光电流都具有重要意义。然而,QI在低维材料中的相干注入光电流可能被其他线性或非线性光学效应所掩盖。本文研究了双色光激发下多层二硫化铼(ReS2)在纳米尺度上产生相干太赫兹(THz)波的相干超快注入光电流。结果表明,在正常入射下,通过调节两色光之间的相对相位可以控制太赫兹辐射。实验结果表明,ReS2的太赫兹辐射是由QI效应的电子相干注入的光电流引起的。然而,在斜入射下,注入光电流被非线性极化、移位电流和漂移电流所掩盖。基于太赫兹幅值与泵浦功率、入射偏振角和双色光之间的相对相位的关系,提出了一种从这些光响应中分离纯注入光电流的方法。这项工作不仅为理解ReS2中的量子光电流提供了一种全光非接触方法,而且促进了固态量子器件的量子相干控制。
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来源期刊
CiteScore
14.20
自引率
5.50%
发文量
314
审稿时长
2 months
期刊介绍: Laser & Photonics Reviews is a reputable journal that publishes high-quality Reviews, original Research Articles, and Perspectives in the field of photonics and optics. It covers both theoretical and experimental aspects, including recent groundbreaking research, specific advancements, and innovative applications. As evidence of its impact and recognition, Laser & Photonics Reviews boasts a remarkable 2022 Impact Factor of 11.0, according to the Journal Citation Reports from Clarivate Analytics (2023). Moreover, it holds impressive rankings in the InCites Journal Citation Reports: in 2021, it was ranked 6th out of 101 in the field of Optics, 15th out of 161 in Applied Physics, and 12th out of 69 in Condensed Matter Physics. The journal uses the ISSN numbers 1863-8880 for print and 1863-8899 for online publications.
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