Parallel and selective trapping in a patterned plasmonic landscape
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TLDR
In this paper, surface plasmons (SP) at metal/dielectric interfaces are used to trap single dielectric beads under non-focused illumination with considerably reduced laser intensity compared with conventional optical tweezers.Abstract:
The implementation of optical tweezers1 at a surface opens a huge potential towards the elaboration of future lab-on-a-chip devices entirely operated with light2. The transition from conventional three-dimensional (3D) tweezers to 2D is made possible by exploiting evanescent fields bound at interfaces3,4,5. In particular, surface plasmons (SP) at metal/dielectric interfaces are expected to be excellent candidates to relax the requirements on incident power and to achieve subwavelength trapping volumes6,7. Here, we report on novel 2D SP-based optical tweezers formed by finite gold areas fabricated at a glass surface. We demonstrate that SP enable stable trapping of single dielectric beads under non-focused illumination with considerably reduced laser intensity compared with conventional optical tweezers. We show that the method can be extended to parallel trapping over any predefined pattern. Finally, we demonstrate how SP tweezers can be designed to selectively trap one type of particles out of a mixture, acting as an efficient optical sieve.read more
Citations
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Plasmofluidic single-molecule surface-enhanced Raman scattering from dynamic assembly of plasmonic nanoparticles
Partha Pratim Patra,Rohit Chikkaraddy,Ravi P. N. Tripathi,Arindam Dasgupta,G. V. Pavan Kumar +4 more
TL;DR: By utilizing dual excitation of plasmons at metal-fluid interface, this work creates interacting assemblies of metal nanoparticles, which may be further harnessed in dynamic lithography of dispersed nanostructures and have implications in realizing optically addressable, plasmofluidic, single-molecule detection platforms.
Journal ArticleDOI
Plasmon nano-optical tweezers
TL;DR: A review of plasmon-based optical traps can be found in this paper, which summarizes the recent advances in the emerging field and discusses the potential applications to bioscience and quantum optics.
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Nanoplasmonics: past, present, and glimpse into future
TL;DR: Fundamental theoretical ideas in nanoplasmonics are reviewed and selected experimental developments are reviewed, including fundamentals, nanolocalization of optical energy and hot spots, ultrafast nanoplAsmonics and control of the spatiotemporal Nanolocalized fields.
Journal ArticleDOI
Optical trapping and manipulation of nanostructures
Onofrio M. Maragò,Philip H. Jones,Pietro Giuseppe Gucciardi,Giovanni Volpe,Andrea C. Ferrari +4 more
TL;DR: The state-of-the-art in optical trapping at the nanoscale is reviewed, with an emphasis on some of the most promising advances, such as controlled manipulation and assembly of individual and multiple nanostructures, force measurement with femtonewton resolution, and biosensors.
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Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides.
TL;DR: An approach to optofluidic transport that overcomes limitations, using sub-wavelength liquid-core slot waveguides, and provides the ability to handle extended biomolecules directly.
References
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Journal ArticleDOI
Surface plasmon subwavelength optics
TL;DR: By altering the structure of a metal's surface, the properties of surface plasmons—in particular their interaction with light—can be tailored, which could lead to miniaturized photonic circuits with length scales that are much smaller than those currently achieved.
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Probing Single Molecules and Single Nanoparticles by Surface-Enhanced Raman Scattering
Shuming Nie,Steven R. Emory +1 more
TL;DR: In this article, surface-enhanced Raman scattering was used to detect single molecules and single nanoparticles at room temperature with the use of surface enhanced Raman, and the intrinsic Raman enhancement factors were on the order of 10 14 to 10 15, much larger than the ensemble-averaged values derived from conventional measurements.
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A revolution in optical manipulation
TL;DR: This research presents the next generation of single-beam optical traps, which promise to take optical tweezers out of the laboratory and into the mainstream of manufacturing and diagnostics and even become consumer products.
Journal ArticleDOI
Single Silver Nanoparticles as Real-Time Optical Sensors with Zeptomole Sensitivity
TL;DR: In this article, the authors demonstrate the localized surface plasmon resonance λmax response of individual Ag nanoparticles to the formation of a monolayer of small-molecule adsorbates.
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Surface-Plasmon-Enhanced Optical Forces in Silver Nanoaggregates
Hongxing Xu,Mikael Käll +1 more
TL;DR: It is shown that single molecules can be trapped at junctions between closely spaced nanoparticles, which are simultaneously pulled together by optical forces and could significantly influence surface-enhanced Raman scattering and related spectroscopies under normal experimental conditions and contribute to single-molecule sensitivity.