Theoretical Investigation of Optical Detection and Recognition of Single Biological Molecules Using Coherent Dynamics of Exciton-Plasmon Coupling

Sadeghi, Seyed M.; Hood, Brady; Patty, Kira D.; Mao, Chuanbin

doi:10.1021/jp405651b

Cited by 12 publications

(6 citation statements)

References 29 publications

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“…Note that one of the major obstacles that limits coherent manipulation of spin valley is known to be the lifetime of exciton valley polarization, which is few hundreds of femtoseconds. − A major feature of the results presented in this paper is that they are obtained when decoherence time of exciton valley is considered to be 400 fs. Additionally, this study draws a clear disparity with the recent reports regarding coherent effect in hybrid systems consisting of semiconductor quantum dots (QDs) and mANTs. − …”

mentioning

confidence: 62%

Intervalley Quantum Coherence Transfer and Coherently-Induced Chiral Plasmon Fields in WS₂–Metallic Nanoantenna Systems

Sadeghi

2019

ACS Photonics

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We theoretically show that when a hybrid system consisting of a transition metal dichalcogenide monolayer (WS2) and an achiral metallic nanoantenna interacts with a circularly polarized laser field, plasmonically mediated coherently induced processes can transfer quantum coherence from one valley (K or K′) to another. This leads to spin-valley-dependent plasmon field enhancement and coherently driven energy transfer from the WS2 monolayer to the nanoantenna. For the case when the incident laser is right circularly polarized (σ+), we study intervalley transfer of excitation and polarization from K to K′ valleys while mapping the evolution of the Stokes vectors associated with the emission of the WS2 monolayer. This is done as we explore the impact of variation of the laser frequency and intensity on K–K′ coupling. Our results show a formation of collective quantum states and an abrupt transition between these states at a certain frequency. We demonstrate that, as such a transition happens, the Stokes vector follows a unique trace that depicts a large degree of control over the valley quantum coherence. This includes an abrupt change in the valley coherent superposition, which causes an outburst of energy transfer from the WS2 monolayer to the nanoantenna.

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mentioning

confidence: 62%

Intervalley Quantum Coherence Transfer and Coherently-Induced Chiral Plasmon Fields in WS₂–Metallic Nanoantenna Systems

Sadeghi

2019

ACS Photonics

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“…In particular, we associate such a field-effect passivation to the transfer of hot electrons from metal thin films to Si layer in the presence of the Si/Al oxide charge barrier. The results of this paper offer a fresh perspective of plasmonic effects which can improve applications of QDs for single photon emitters [17], quantum sensors [18,19], and various other optical devices based on QDs.…”

Section: Introductionmentioning

confidence: 98%

Semiconductor quantum dot super-emitters: spontaneous emission enhancement combined with suppression of defect environment using metal-oxide plasmonic metafilms

Sadeghi

Wing²,

Gutha³

et al. 2017

Nanotechnology

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We demonstrate that a metal-oxide plasmonic metafilm consisting of a Si/Al oxide junction in the vicinity of a thin gold layer can quarantine excitons in colloidal semiconductor quantum dots against their defect environments. This process happens while the plasmon fields of the gold layer enhance spontaneous emission decay rates of the quantum dots. We study the emission dynamics of such quantum dots when the distance between the Si/Al oxide junction and the gold thin layer is varied. The results show that for distances less than a critical value the lifetime of the quantum dots can be elongated while they experience intense plasmon fields. This suggests that the metal-oxide metafilm can keep photo-excited electrons in the cores of the quantum dots, suppressing their migration to the surface defect sites. This leads to suppression of Auger recombination, offering quantum dot super-emitters with emission that is enhanced not only by the plasmon fields (Purcell effect), but also by strong suppression of the non-radiative decay caused by the defect sites.

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“…The quantum phase-dependent changes in the coherent excitonplasmon coupling provide the capability of detecting and distinguishing adsorption or detachment of target molecules. A similar structure has also been considered for optical detection and recognition of single biological molecules [485]. Adsorption of a specific molecule to the nanorod results in the ultrafast upheaval of coherent dynamics of the system, that turns off the blockage of energy transfer between the quantum dot and the nanorod.…”

Section: Quantum Plasmonic Sensing Based On Emitter-plasmon Couplingmentioning

confidence: 99%

“…A similar structure has also been considered for optical detection and recognition of single biological molecules. 543 Adsorption of a specific molecule to the nanorod results in the ultrafast upheaval of coherent dynamics of the system, that turns off the blockage of energy transfer between the quantum dot and the nanorod. The emission of the system is thus strongly modified depending on the adsorption event.…”

Section: Quantum Plasmonic Phase Sensingmentioning

confidence: 99%

Quantum Plasmonic Sensors

et al. 2021

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The extraordinary sensitivity of plasmonic sensors is well known in the optics and photonics community. These sensors exploit simultaneously the enhancement and the localization of electromagnetic fields close to the interface between a metal and a dielectric. This enables, for example, the design of integrated biochemical sensors at scales far below the diffraction limit. Despite their practical realization and successful commercialization, the sensitivity and associated precision of plasmonic sensors are starting to reach their fundamental classical limit given by quantum fluctuations of light -known as the shot-noise limit. To improve the sensing performance of these sensors beyond the classical limit, quantum resources are increasingly being employed. This area of research has become known as 'quantum plasmonic sensing' and it has experienced substantial activity in recent years for applications in chemical and biological sensing. This review aims to cover both plasmonic and quantum techniques for sensing, and shows how they have been merged to enhance the performance of plasmonic sensors beyond traditional methods. We discuss the general framework developed for quantum plasmonic sensing in recent years, covering the basic theory behind the advancements made, and describe the important works that made these advancements. We also describe several key works in detail, highlighting their motivation, the working principles behind them, and their future impact. The intention of the review is to set a foundation for a burgeoning field of research that is currently being explored out of intellectual curiosity and for a wide range of practical applications in biochemistry, medicine, and pharmaceutical research.

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Theoretical Investigation of Optical Detection and Recognition of Single Biological Molecules Using Coherent Dynamics of Exciton-Plasmon Coupling

Cited by 12 publications

References 29 publications

Intervalley Quantum Coherence Transfer and Coherently-Induced Chiral Plasmon Fields in WS₂–Metallic Nanoantenna Systems

Intervalley Quantum Coherence Transfer and Coherently-Induced Chiral Plasmon Fields in WS₂–Metallic Nanoantenna Systems

Semiconductor quantum dot super-emitters: spontaneous emission enhancement combined with suppression of defect environment using metal-oxide plasmonic metafilms

Quantum Plasmonic Sensors

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Theoretical Investigation of Optical Detection and Recognition of Single Biological Molecules Using Coherent Dynamics of Exciton-Plasmon Coupling

Cited by 12 publications

References 29 publications

Intervalley Quantum Coherence Transfer and Coherently-Induced Chiral Plasmon Fields in WS2–Metallic Nanoantenna Systems

Intervalley Quantum Coherence Transfer and Coherently-Induced Chiral Plasmon Fields in WS2–Metallic Nanoantenna Systems

Semiconductor quantum dot super-emitters: spontaneous emission enhancement combined with suppression of defect environment using metal-oxide plasmonic metafilms

Quantum Plasmonic Sensors

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Product

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About

Intervalley Quantum Coherence Transfer and Coherently-Induced Chiral Plasmon Fields in WS₂–Metallic Nanoantenna Systems

Intervalley Quantum Coherence Transfer and Coherently-Induced Chiral Plasmon Fields in WS₂–Metallic Nanoantenna Systems