Quantum Plasmonic Immunoassay Sensing

Kongsuwan, Nuttawut; Xiong, X.; Bai, Peng; You, Jia-Bin; Png, Ching Eng; Wu, Lin; Hess, Ortwin

doi:10.1021/acs.nanolett.9b01137

Cited by 70 publications

(71 citation statements)

References 65 publications

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“…This study also unveils rich and intricate multi-modal interactions with a single quantum emitter and has the potential to aid the design of quantum plasmonic experiments, such as quantum computing with DNA-origami-controlled qubits 24 and quantum plasmonic immunoassay sensing. 47…”

Section: Discussionmentioning

confidence: 99%

Plasmonic Nanocavity Modes: From Near-Field to Far-Field Radiation

et al. 2020

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In the past decade, advances in nanotechnology have led to the development of plasmonic nanocavities which facilitate light-matter strong coupling in ambient conditions. The most robust example is the nanoparticle-on-mirror (NPoM) structure whose geometry is controlled with subnanometer precision. The excited plasmons in such nanocavities are extremely sensitive to the exact morphology of the nanocavity, giving rise to unexpected optical behaviors. So far, most theoretical and experimental studies on such nanocavities have been based solely on their scattering and absorption properties. However, these methods do not provide a complete optical description of a NPoM. Here, the NPoM is treated as an open non-conservative system supporting a set of photonic quasinormal modes (QNMs). By investigating the morphology-dependent 1 arXiv:1910.02273v1 [physics.optics] 5 Oct 2019 optical properties of nanocavities, we propose a simple yet comprehensive nomenclature based on spherical harmonics and report spectrally overlapping bright and dark nanogap eigenmodes. The near-field and far-field optical properties of NPoMs are explored and reveal intricate multi-modal interactions. Introduction Metallic nanostructures have the ability to confine light below the diffraction limit via the collective excitation of conduction electrons, called localized surface plasmons. Through recent advances in nanofabrication techniques, gaps of just 1-2 nm between nanostructures have been achieved. 1,2 At such extreme nanogaps, the plasmonic modes of two nanostructures hybridize to allow an unprecedented light confinement, 3,4 making coupled nanostructures an ideal platform for field-enhanced spectroscopy, 5,6 photocatalysis 7 and nano-optoelectronics. 8One such nanostructure is the nanoparticle-on-mirror (NPoM) geometry where a nanoparticle is separated from an underlying metal film by a molecular mono-layer. 9,10 This geometry (which resembles the prototypical dimer but is more reliable and robust to fabricate) has attracted considerable interest since it enables light-matter strong-coupling of a single molecule at room temperature, 11 and it has many potential applications, including biosensing 12 and quantum information. 13,14 A wide range of theoretical and experimental studies have been conducted to investigate the optical properties of NPoM nanocavities. 12,15,16 Several studies examine resonances of NPoMs 17-21 and their influence on optical emission of single molecules in the nanogaps. [22][23][24] However, most studies on the nanocavities have so far described their optical response via a scattering method and infer their resonances from resulting far-field spectral peaks. Although

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Section: Discussionmentioning

confidence: 99%

Plasmonic Nanocavity Modes: From Near-Field to Far-Field Radiation

et al. 2020

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“…It should be emphasized here that, from a theoretical point of view, absorption cross-section or photoluminescence spectrum could provide more accurate information to identify the interaction regime between emitters and cavity, especially for the transition regime from weak to strong coupling [33,35]. In our case, plexcitonic systems are in the ultrastrong coupling regime; hence, the scattering cross-section is good enough to reveal the information of an interaction regime.…”

Section: Ultrastrong Coupling To Antenna Modementioning

confidence: 77%

“…The antenna mode in c-NCoM has multiple hot spots and these hot spots are located at the upper corners of the nanocubes, which are more easily accessible to enhance various physical or chemical processes such as sensing or catalysis, e.g. the recently proposed quantum plasmonic immunoassay sensing [33]. Additionally, the optical resonance of the antenna mode, as well as its strong field enhancement, is less sensitive to the gap size (see Supplementary Section S1), which makes it easier to be used in many practical applications.…”

Section: Antenna Modementioning

confidence: 99%

Ultrastrong coupling in single plexcitonic nanocubes

et al. 2019

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Light-matter strong coupling is defined when the coupling strength exceeds the losses in the system, whereas ultrastrong coupling is not simply strong coupling with even larger coupling strength. Instead, ultrastrong coupling regime arises when the coupling strength is comparable to the transition frequency in the system. At present, ultrastrong light-matter interactions have been achieved in superconducting circuits, semiconductor polaritons, and organic molecules, where these systems are typically at the micrometer scale. In this work, we investigated ultrastrong coupling in a nanoparticle plexcitonic system, i.e. a single gold nanocube coated with quantum emitters and positioned on a gold film. We observed a normalized coupling rate η ~ 0.12 to the antenna mode in such coated nanocube-on-mirror (c-NCoM) configuration at the multilayer emitter level. In contrast to the gap mode that squeezes all the optical fields into the gap region, the antenna mode in c-NCoM provides multiple exterior hot spots at the upper corners of the nanocube, which can be exploited for qubit entanglement within a single nanocube. The concurrence between adjacent emitters is estimated up to 0.6. This theoretical study establishes a promising route toward building a scalable quantum network using single plexcitonic nanocubes as quantum nodes.

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“…Beyond the development of new quantum materials, another emerging area of research couples quantum emitters with plasmonic materials (e.g., quantum plasmonic sensing), which promises significant improvement in measurement sensitivity. [ 186 ] Further advances in the development of both quantum sensing materials and strategies are anticipated to expand the accessibility and efficacy of quantum sensing technologies for energy‐relevant applications.…”

Section: Quantum Sensingmentioning

confidence: 99%

Quantum Sensing for Energy Applications: Review and Perspective

et al. 2021

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On its revolutionary threshold, quantum sensing is creating potentially transformative opportunities to exploit intricate quantum mechanical phenomena in new ways to make ultrasensitive measurements of multiple parameters. Concurrently, growing interest in quantum sensing has created opportunities for its deployment to improve processes pertaining to energy production, distribution, and consumption. Safe and secure utilization of energy is dependent upon addressing challenges related to material stability and function, secure monitoring of infrastructure, and accuracy in detection and measurement. A summary of well‐established and emerging quantum sensing materials and techniques, as well as the corresponding sensing platforms that have been developed for their deployment is provided here. Specifically, the enhancement of existing advanced sensing technologies with quantum methods and materials is focused on, enabling the realization of an unprecedented level of sensitivity, placing an emphasis on relevance to the energy industry. The review concludes with a discussion on high‐value applications of quantum sensing to the energy sector, as well as remaining barriers to sensor deployment.

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Quantum Plasmonic Immunoassay Sensing

Cited by 70 publications

References 65 publications

Plasmonic Nanocavity Modes: From Near-Field to Far-Field Radiation

Plasmonic Nanocavity Modes: From Near-Field to Far-Field Radiation

Ultrastrong coupling in single plexcitonic nanocubes

Quantum Sensing for Energy Applications: Review and Perspective

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