Optical trapping of single quantum dots for cavity quantum electrodynamics

Zhang, Pengfei; Song, Gang; Yu, Li

doi:10.1364/prj.6.000182

Cited by 38 publications

(23 citation statements)

References 28 publications

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“…In SIBA optical trapping, the trapped object strongly influences the strength of local field enhancement and thereby plays an active role in the trapping process through self‐induced back‐action effect. [ 90,92–94 ] In this strategy, the cavity resonance is modulated by the changes in the particle position, resulting in a dynamic optical trapping whose long‐term stability requires much lower average intensities compared with a static potential. [ 80 ] Following this approach, it was possible to trap sub‐100 nm objects as well as individual biomolecules by using an average local field intensity orders of magnitude weaker than from conventional optical tweezers.…”

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

“…The red shift of the cavity resonance induced by the presence of the trapped object sets the nanostructure on resonance, increasing optical near‐field intensity. [ 24,94 ]…”

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

“…To date a number of theoretical and experimental works on near‐field optical trapping involving SIBA approach have been reported. [ 5,11,24,27,80,89,94 ] The theoretical work reported by Zhang et al reveals that the trapping of 8 nm sized single QD in 20 nm gap silver nanocavity ( Figure a) results in significant variation in the local field intensity. [ 94 ] In absence of the quantum dot, the local field intensity shows uniform distribution around the cavity region (Figure 5b).…”

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

“…[ 5,11,24,27,80,89,94 ] The theoretical work reported by Zhang et al reveals that the trapping of 8 nm sized single QD in 20 nm gap silver nanocavity ( Figure a) results in significant variation in the local field intensity. [ 94 ] In absence of the quantum dot, the local field intensity shows uniform distribution around the cavity region (Figure 5b). However, when the QD is placed near to one of the cavity tips, the hot spots around the quantum dot shows higher intensity compared with other regions of the nanocavity (Figure 5c).…”

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

“…Reproduced with permission. [ 94 ] Copyright 2018, Chinese Laser Press. d) Schematic drawing of the trapping setup for a Fabry−Perot nanopore cavity (40 × 170 nm 2 ) in a freestanding silicon membrane coated with a 100 nm thick gold layer.…”

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

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Novel Plasmonic Nanocavities for Optical Trapping‐Assisted Biosensing Applications

Koya

Cunha

Guo

et al. 2020

Advanced Optical Materials

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However, due to the intrinsic low optical response of small objects, there has been a clear trade-off between the size of a material and its response to light. [5] Recently, plasmonic nanostructures have emerged as leading platforms to enhance the weak optical signals of low dimensional materials including quantum dots (QDs), [6] small molecules, [7,8] and 2D monolayers. [9] The plasmonic enhancement of linear and nonlinear optical processes capitalizes on the near-and far-field properties of metallic (e.g., gold and silver) nanostructures. [10] One of the defining features of plasmonic nanostructures is their potential to confine light into deep subwavelength volumes, which has opened a new door to trap and manipulate dielectric, metallic, and biological nano-objects. [11] Moreover, metallic nanostructures are characterized by their capability to amplify the intensity of optical fields by orders of magnitude. The enhancement of local field intensity is attributed to the resonance of plasmon polaritons arising from the coupling of external electromagnetic fields to the collective oscillations of the conduction electrons. [12] A small perturbation (or change in the refractive index) of the near field zone of plasmonic nanostructures leads to significant shift in the plasmon polariton resonance wavelength, which has important implications for surface-enhanced sensing and spectroscopic applications. [13,14] Thus, for the ad-hoc enhancement of optical Plasmonic nanocavities have proved to confine electromagnetic fields into deep subwavelength volumes, implying their potentials for enhanced optical trapping and sensing of nanoparticles. In this review, the fundamentals and performances of various plasmonic nanocavity geometries are explored with specific emphasis on trapping and detection of small molecules and single nanoparticles. These applications capitalize on the local field intensity, which in turn depends on the size of plasmonic nanocavities. Indeed, properly designed structures provide significant local field intensity and deep trapping potential, leading to manipulation of nano-objects with low laser power. The relationship between optical trappinginduced resonance shift and potential energy of plasmonic nanocavity can be analytically expressed in terms of the intercavity field intensity. Within this framework, recent experimental works on trapping and sensing of single nanoparticles and small molecules with plasmonic nanotweezers are discussed. Furthermore, significant consideration is given to conjugation of optical tweezers with Raman spectroscopy, with the aim of developing innovative biosensors. These devices, which take the advantages of plasmonic nanocavities, will be capable of trapping and detecting nanoparticles at the single molecule level.

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Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

“…The red shift of the cavity resonance induced by the presence of the trapped object sets the nanostructure on resonance, increasing optical near‐field intensity. [ 24,94 ]…”

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

Section: Optical Trapping In Plasmonic Nanocavitiesmentioning

confidence: 99%

See 3 more Smart Citations

Novel Plasmonic Nanocavities for Optical Trapping‐Assisted Biosensing Applications

Koya

Cunha

Guo

et al. 2020

Advanced Optical Materials

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Highly‐Adaptable Optothermal Nanotweezers for Trapping, Sorting, and Assembling across Diverse Nanoparticles

Chen,

Zhou,

Peng

et al. 2023

Advanced Materials

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Optical manipulation of various kinds of nanoparticles is vital in biomedical engineering. However, classical optical approaches demand higher laser power and are constrained by diffraction limits, necessitating tailored trapping schemes for specific nanoparticles. They lack a universal and biocompatible tool to manipulate nanoparticles of diverse sizes, charges, and materials. Through precise modulation of diffusiophoresis and thermo‐osmotic flows in the boundary layer of an optothermal‐responsive gold film, highly adaptable optothermal nanotweezers (HAONTs) capable of manipulating a single nanoparticle as small as sub‐10 nm are designed. Additionally, a novel optothermal doughnut‐shaped vortex (DSV) trapping strategy is introduced, enabling a new mode of physical interaction between cells and nanoparticles. Furthermore, this versatile approach allows for the manipulation of nanoparticles in organic, inorganic, and biological forms. It also offers versatile function modes such as trapping, sorting, and assembling of nanoparticles. It is believed that this approach holds the potential to be a valuable tool in fields such as synthetic biology, optofluidics, nanophotonics, and colloidal science.

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Hydrogen detector in Kretschmann configuration based on an inorganic perovskite

Ye,

Song

2024

J Comput Electron

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Optical trapping of single quantum dots for cavity quantum electrodynamics

Cited by 38 publications

References 28 publications

Novel Plasmonic Nanocavities for Optical Trapping‐Assisted Biosensing Applications

Novel Plasmonic Nanocavities for Optical Trapping‐Assisted Biosensing Applications

Highly‐Adaptable Optothermal Nanotweezers for Trapping, Sorting, and Assembling across Diverse Nanoparticles

Hydrogen detector in Kretschmann configuration based on an inorganic perovskite

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