Quantum photonics with layered 2D materials

Turunen, Mikko T.; Brotons‐Gisbert, Mauro; Dai, Yunyun; Wang, Yadong; Scerri, Eleanor; Bonato, Cristian; Jöns, Klaus D.; Sun, Zhipei; Gerardot, Brian D.

doi:10.1038/s42254-021-00408-0

Cited by 142 publications

(91 citation statements)

References 300 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Spin-defects in host crystals can be fundamental building blocks for quantum technologies, such as computing, sensing or communication [1][2][3]. For instance, color centers in diamond have been investigated since the early 1980s, of which the nitrogen vacancy center (NV) is the most prominent example [4,5].…”

Section: Introductionmentioning

confidence: 99%

Spin-defect characteristics of single sulfur vacancies in monolayer $\text{MoS}_2$

Hötger¹,

Amit²,

Klein³

et al. 2022

Preprint

View full text Add to dashboard Cite

Single spin defects in 2D transition-metal dichalcogenides are natural spin-photon interfaces for quantum applications. Here we report high-field magneto-photoluminescence spectroscopy from three emission lines (Q1, Q2 and Q*) of He-ion induced sulfur vacancies in monolayer MoS2. Analysis of the asymmetric PL lineshapes in combination with the diamagnetic shift of Q1 and Q2 yields a consistent picture of localized emitters with a wavefunction extent of ∼3.5 nm. The distinct valley-Zeeman splitting in out-of-plane B-fields and the brightening of dark states through in-plane Bfields necessitates spin-valley selectivity of the defect states and lifted spin-degeneracy at zero field. Comparing our results to ab-initio calculations identifies the nature of Q1 and Q2 and suggests that Q* is the emission from a chemically functionalized defect. Analysis of the optical degree of circular polarization reveals that the Fermi level is a parameter that enables the tunability of the emitter. These results show that defects in 2D semiconductors may be utilized for quantum technologies.

show abstract

Section: Introductionmentioning

confidence: 99%

Spin-defect characteristics of single sulfur vacancies in monolayer $\text{MoS}_2$

Hötger¹,

Amit²,

Klein³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…The source may comprise a solid state laser attenuated to the single photon level, photon pair sources [92] or single photon emitters (such as semiconductor quantum dots [93,94] or diamond NV centres [95] or defects in 2D materials [96,97]). 2D materials are very appealing for on-chip quantum devices for quantum integrated photonic circuits, because of the ease and low-cost of integration with the Si and SiN photonic platforms, and because emitters, modulators, and detectors are all based on the same material platform [98,99].…”

Section: Quantum Communicationmentioning

confidence: 99%

Materials and devices for fundamental quantum science and quantum technologies

Polini¹,

Giazotto²,

Fong³

et al. 2022

Preprint

View full text Add to dashboard Cite

Technologies operating on the basis of quantum mechanical laws and resources such as phase coherence and entanglement are expected to revolutionize our future. Quantum technologies are often divided into four main pillars: computing, simulation, communication, and sensing & metrology. Moreover, a great deal of interest is currently also nucleating around energy-related quantum technologies. In this Perspective, we focus on advanced superconducting materials, van der Waals materials, and moiré quantum matter, summarizing recent exciting developments and highlighting a wealth of potential applications, ranging from high-energy experimental and theoretical physics to quantum materials science and energy storage.

show abstract

“…Semiconductor quantum dots [5,6] and color centers in diamond [7] are currently the main candidates among quantum emitters in the solid-state. However, monolayers of transition metal dichalcogenides (TMDCs) encounter increasing interest, due to the ease and flexibility in engineering their photonic properties and their straight-forward integration in photonic devices [8][9][10][11]. Single-photon emission from trapped excitons in atomically thin crystals was initially confirmed in monolayers of WSe 2 [12][13][14][15][16] and later complemented using WS 2 [17], MoS 2 [18,19] and MoTe 2 [20].…”

Section: Introductionmentioning

confidence: 99%

Atomically-thin Single-photon Sources for Quantum Communication

Gao¹,

Helversen²,

Antón-Solanas³

et al. 2022

Preprint

View full text Add to dashboard Cite

To date, quantum communication widely relies on attenuated lasers for secret key generation. In future quantum networks fundamental limitations resulting from their probabilistic photon distribution must be overcome by using deterministic quantum light sources. Confined excitons in monolayers of transition metal dichalcogenides (TMDCs) constitute a novel type of emitter for quantum light generation. These atomically-thin solid-state sources show appealing prospects for large-scale and low-cost device integration, meeting the demands of quantum information technologies. Here, we pioneer the practical suitability of TMDC devices in quantum communication. We employ a WSe2 monolayer single-photon source to emulate the BB84 protocol in a quantum key distribution (QKD) setup and achieve raw key rates of up to 66.95 kHz and antibunching values down to 0.034 -a performance competitive with QKD experiments using semiconductor quantum dots or color centers in diamond. Our work opens the route towards wider applications of quantum information technologies using TMDC single-photon sources.

show abstract

Quantum photonics with layered 2D materials

Cited by 142 publications

References 300 publications

Spin-defect characteristics of single sulfur vacancies in monolayer $\text{MoS}_2$

Spin-defect characteristics of single sulfur vacancies in monolayer $\text{MoS}_2$

Materials and devices for fundamental quantum science and quantum technologies

Atomically-thin Single-photon Sources for Quantum Communication

Contact Info

Product

Resources

About