Nano-imaging photoresponse in a moiré unit cell of minimally twisted bilayer graphene

Hesp, Niels C. H.; Torre, Iacopo; Ruiz, David Barcons; Sheinfux, Hanan Herzig; Watanabe, Kenji; Taniguchi, Takashi; Kumar, Roshan Krishna

doi:10.1038/s41467-021-21862-5

Cited by 55 publications

(38 citation statements)

References 58 publications

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“…Graphene, an amazing carbon-related two-dimensional nanomaterial with distinct electrical, thermal, and mechanical properties, has become extremely popular in biomedical field since its discovery in 2004 [73]. This newly proposed material possesses large surface area, great biocompatibility, good stability, distinctive thermal and optical properties, and superb conductivity [74].…”

Section: Graphene-based Nanomaterialsmentioning

confidence: 99%

Multifunctional inorganic nanomaterials for cancer photoimmunotherapy

Tang

Zhang

et al. 2022

Cancer Communications

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Phototherapy and immunotherapy in combination is regarded as the ideal therapeutic modality to treat both primary and metastatic tumors. Immunotherapy uses different immunological approaches to stimulate the immune system to identify tumor cells for targeted elimination. Phototherapy destroys the primary tumors by light irradiation, which induces a series of immune responses through triggering immunogenic cancer cell death. Therefore, when integrating immunotherapy with phototherapy, a novel anti-cancer strategy called photoimmunotherapy (PIT) is emerging. This synergistic treatment modality can not only enhance the effectiveness of both therapies but also overcome their inherent limitations, opening a new era for the current anti-cancer therapy. Recently, the advancement of nanomaterials affords a platform for PIT. From all these nanomaterials, inorganic nanomaterials stand out as ideal mediators in PIT due to their unique physiochemical properties. Inorganic nanomaterials can not only serve as carriers to transport immunomodulatory agents in immunotherapy owing to their excellent drug-loading capacity but also function as photothermal agents or photosensitizers in phototherapy because of their great optical characteristics. In this review, the recent advances of multifunctional inorganic nanomaterial-mediated drug delivery and their contributions to cancer PIT will be highlighted.

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Section: Graphene-based Nanomaterialsmentioning

confidence: 99%

Multifunctional inorganic nanomaterials for cancer photoimmunotherapy

Tang

Zhang

et al. 2022

Cancer Communications

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“…Despite extensive studies on twisted bilayer graphene, based on transport and scanning techniques, and several interesting theoretical predictions [256][257][258][259][260] , a complete study of its optical properties 261,262 , in particular at low temperatures, where the symmetry-broken states arise is still lacking. In this context, nanophotonics probes like s-SNOM 261,262 and spectroscopy are ideal candidates since they are able to conjugate high spatial resolution (down to ≈ 10nm), with energies that are matching the expected optical features, often in the mid-Infrared or Terahertz (THz) frequency ranges (cf. Figure 7a-b).…”

Section: Moiré Systemsmentioning

confidence: 99%

“…The curved arrows indicate the light impinging on the tip (coming from the laser) as well as the scattered light (going to the detector). Adapted from ref262 . b: 2D plots of the energy loss function L(q, ω) at θ = 1.05°.…”

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confidence: 99%

Quantum Nanophotonics in Two-Dimensional Materials

et al. 2021

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The field of 2D materials-based nanophotonics has been growing at a rapid pace, triggered by the ability to design nanophotonic systems with in-situ control 1 , unprecedented degrees of freedom, and to build material heterostructures from bottom up with atomic precision 2 . A wide palette of polaritonic classes [3][4][5][6] have been identified, comprising ultra-confined optical fields, even approaching characteristic length-scales of a single atom 7 . These advances have been a real boost for the emerging field of quantum nanophotonics, where the quantum mechanical nature of the electrons and/or polaritons and their interactions become relevant. Examples include, quantum nonlocal effects [8][9][10][11] , ultrastrong light-matter interactions [11][12][13][14][15][16] , Cherenkov radiation 13,17,18 , access to forbidden transitions 11 , hydrodynamic effects [19][20][21] , single-plasmon nonlinearities 22,23 , polaritonic quantization 24 , topological effects etc. 3,4 . In addition to these intrinsic quantum nanophotonic phenomena, the 2D material system can also be used as a sensitive probe for the quantum properties of the material that carries the nanophotonics modes, or quantum materials in its vicinity. Here, polaritons act as a probe for otherwise invisible excitations, e.g. in superconductors 25 , or as a new tool to monitor the existence of Berry curvature in topological materials and superlattice effects in twisted 2D materials.In this article, we present an overview of the emergent field of 2D-material quantum nanophotonics, and provide a future perspective on the prospects of both fundamental emergent phenomena and emergent quantum technologies, such as quantum sensing, single-photon sources and quantum emitters manipulation. We address four main implications (cf. Figure 1): i) quantum sensing, featuring polaritons to probe superconductivity and explore new electronic transport hydrodynamic behaviours, ii) quantum technologies harnessing single-photon generation, manipulation and detection using 2D materials, iii) polariton engineering with quantum materials enabled by twist angle and stacking order control in van der Waals heterostructures and iv) extreme light-matter interactions enabled by the strong confinement of light at atomic level by 2D materials, which provide new tools to manipulate light fields at the nano-scale (e.g., quantum chemistry 26 , nonlocal effects, high Purcell enhancement).

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“…b. Indirect lattice matching between materials with very different lattice constants for epitaxial integration c. Wafer bonding, using a thin film of amorphous material d. polycrystaline integration on a substrate e. integration based on 2D materials, wher ethe weak out of plane bonding allows different materials to couple without lattice matching f. recent demonstration of integration of 2D materials with optoelectronically active graphene, from reference [179] sible in this platform [192,193]. Other materials, such as black phosphorous [194] and platinum diselenide [195] show potential for detection of infrared light.…”

Section: D Materialsmentioning

confidence: 99%

Perspective: Phonon polaritons for infrared optoelectronics

Gubbin,

De Liberato,

Folland

2021

Preprint

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In recent years there has been significant fundamental research into phonon polaritons, owing to their ability to compress light to extremely small dimensions, low-losses, and ability to support anisotropic propagation. In this perspective, after briefly reviewing the present state of mid-infrared optoelectronics, we will assess the potential of phonon-polariton based nanophotonics for infrared (3-100µm) light sources, detectors and modulators. These will operate in the Reststrahlen region where conventional semiconductor light sources become ineffective. Drawing on the results from the past few years, we will sketch some promising paths to create such devices and we will evaluate their practical advantages and disadvantages when compared to other approaches to infrared optoelectronics.

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Nano-imaging photoresponse in a moiré unit cell of minimally twisted bilayer graphene

Cited by 55 publications

References 58 publications

Multifunctional inorganic nanomaterials for cancer photoimmunotherapy

Multifunctional inorganic nanomaterials for cancer photoimmunotherapy

Quantum Nanophotonics in Two-Dimensional Materials

Perspective: Phonon polaritons for infrared optoelectronics

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