Tuneable Excitonic Integrated Circuits
Lead Research Organisation:
UNIVERSITY OF EXETER
Department Name: Physics and Astronomy
Abstract
This project is a fundamental science exploration of novel ways to manipulate and confine quasiparticles known as excitons emerging in atomically thin (2D) semiconductors and their heterostructures, with the aim to demonstrate the control over fluxes of these hydrogen-like bosonic particles and therefore open a pathway to the study of excitons in controllable potential profiles. This studies are cornerstone to pioneer the on-chip bosonic counterpart of quantum electronics and novel macroscopic quantum states. At the same time the on-chip control of excitons dynamics and flow may offer radically new approaches to interface efficient photon-based signal communication to electron-based signal processing technologies. In this proposal we will undertake the timely and ambitious search for radically novel physical concepts needed to enable the development of tuneable excitonic integrated circuits working in ambient conditions.
2D semiconductors transition metal dichalcogenides (TMDC) typically have an exciton binding energy exceeding the room temperature thermal energy. In addition, their photo-physical properties can be tuned by controlling the electrostatic doping, the dielectric environment and stacking sequences of materials assembled in so-called van der Waals heterostructures leading to the observation of long lived interlayer excitons consisting of spatially separated electron-hole pairs in 2D heterostructures, Moiré excitons, a high-temperature macroscopic state corresponding to the condensation of interlayer excitons akin to a condensate of atoms and the electric field control of interlayer excitons in heterostructures. Whilst 2D systems are an ideally suited platform for exploring the novel fundamental science of excitons, the ambitious and timely quest at the core of this project will have to overcome four main challenges. Can an exciton effective pressure be engineered in 2D materials to displace these charge neutral quasiparticles which do not respond to an electric field? Is there any new type of exciton with a non-zero electric dipole and a sufficiently large oscillator strength to enable room temperature electrical tuneability in 2D heterostructures? Which 2D materials are better suited for tuneable excitonic integrated circuits working in ambient conditions? Are there ways to control the exciton lifetimes?
This proposal will pioneer answers and solutions to the aforementioned challenges to accomplish a step change in the control of excitons in integrated circuits operating in ambient conditions. This timely and ambitious goal will be accomplished by exploring novel fundamental science of the physics of excitons in some of the most promising material systems for the on-chip control of exciton fluxes such as atomically thin semiconductors.
2D semiconductors transition metal dichalcogenides (TMDC) typically have an exciton binding energy exceeding the room temperature thermal energy. In addition, their photo-physical properties can be tuned by controlling the electrostatic doping, the dielectric environment and stacking sequences of materials assembled in so-called van der Waals heterostructures leading to the observation of long lived interlayer excitons consisting of spatially separated electron-hole pairs in 2D heterostructures, Moiré excitons, a high-temperature macroscopic state corresponding to the condensation of interlayer excitons akin to a condensate of atoms and the electric field control of interlayer excitons in heterostructures. Whilst 2D systems are an ideally suited platform for exploring the novel fundamental science of excitons, the ambitious and timely quest at the core of this project will have to overcome four main challenges. Can an exciton effective pressure be engineered in 2D materials to displace these charge neutral quasiparticles which do not respond to an electric field? Is there any new type of exciton with a non-zero electric dipole and a sufficiently large oscillator strength to enable room temperature electrical tuneability in 2D heterostructures? Which 2D materials are better suited for tuneable excitonic integrated circuits working in ambient conditions? Are there ways to control the exciton lifetimes?
This proposal will pioneer answers and solutions to the aforementioned challenges to accomplish a step change in the control of excitons in integrated circuits operating in ambient conditions. This timely and ambitious goal will be accomplished by exploring novel fundamental science of the physics of excitons in some of the most promising material systems for the on-chip control of exciton fluxes such as atomically thin semiconductors.
Organisations
People |
ORCID iD |
Saverio Russo (Principal Investigator) |
Publications
Durante O
(2023)
Subthreshold Current Suppression in ReS2 Nanosheet-Based Field-Effect Transistors at High Temperatures.
in ACS applied nano materials
Ilyakov I
(2023)
Ultrafast Tunable Terahertz-to-Visible Light Conversion through Thermal Radiation from Graphene Metamaterials
in Nano Letters
Intonti K
(2023)
Hysteresis and Photoconductivity of Few-Layer ReSe 2 Field Effect Transistors Enhanced by Air Pressure
in Advanced Electronic Materials
Intonti K
(2023)
Temperature-Dependent Conduction and Photoresponse in Few-Layer ReS2.
in ACS applied materials & interfaces
Leontis I
(2023)
Sharp ballistic p-n junction at room temperature using Zn metal doping of graphene
in 2D Materials
Peimyoo N
(2021)
Electrical tuning of optically active interlayer excitons in bilayer MoS2.
in Nature nanotechnology
Pelella A
(2023)
Two-dimensional a-In2Se3 field effect transistor for wide-band photodetection and non-volatile memory
in Journal of Physics and Chemistry of Solids
Description | We have discovered a new mechanism for the fast exciton manipulation in 2D layered perovskites which we have submitted for publication to a high profile journal |
Exploitation Route | It can enable ultra-fast imaging technologies with sub-wavelength pixel size |
Sectors | Electronics Energy |
Description | The data acquired on the manipulation of excitons in emerging 2D perovskites are attracting the attention of a wider community of technology industries keen to exploit the exciton-enhanced light-matter interaction in these materials for sensing. Hence, owing to the data and findings of this project, I have been able to apply for follow-on funding of industry led consortium with Monozukuri Ltd and a second consortium on the use of these sensors applied to the construction sector. In addition, findings on the interaction of materials with high-energy radiation have led to an Innovate UK project on medical applications. |
First Year Of Impact | 2023 |
Sector | Digital/Communication/Information Technologies (including Software),Environment,Healthcare |