Surface Plasmon Radiation Forces

Volpe, Giovanni; Quidant, Romain; Badenes, G.; Petrov, Dmitri

doi:10.1103/physrevlett.96.238101

Cited by 270 publications

(215 citation statements)

References 34 publications

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“…A special feature of the BS detection compared to the FS case is that the same lens is used both for trapping and for collecting the scattering light. In the literature, the use of the BS light for position and force detection is mentioned [26][27][28][29][30][31] but, contrary to the FS light detection, has not been discussed extensively.…”

Section: Introductionmentioning

confidence: 99%

“…This occurs, for example, in biophysical applications where one of the two faces of a sample holder needs to be coated with some specific material 26 or in plasmonics applications where a plasmon wave needs to be coupled to one of the faces of the holder. 28 Furthermore, the BS mode of operation makes it easier to combine the optical trap with other techniques such as atomic force microscopy, which requires access to one side of the holder. A special feature of the BS detection compared to the FS case is that the same lens is used both for trapping and for collecting the scattering light.…”

Section: Introductionmentioning

confidence: 99%

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Backscattering position detection for photonic force microscopy

Volpe

Kozyreff

Petrov

2007

Journal of Applied Physics

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An optically trapped particle is an extremely sensitive probe for the measurement of pico-and femto-Newton forces between the particle and its environment in microscopic systems ͑photonic force microscopy͒. A typical setup comprises an optical trap, which holds the probe, and a position sensing system, which uses the scattering of a beam illuminating the probe. Usually the position is accurately determined by measuring the deflection of the forward-scattered light transmitted through the probe. However, geometrical constraints may prevent access to this side of the trap, forcing one to make use of the backscattered light instead. A theory is presented together with numerical results that describes the use of the backscattered light for position detection. With a Mie-Debye approach, we compute the total ͑incident plus scattered͒ field and follow its evolution as it is collected by the condenser lenses and projected onto the position detectors and the responses of position sensitive detectors and quadrant photodetectors to the displacement of the probe in the optical trap, both in forward and backward configurations. We find out that in the case of backward detection, for both types of detectors the displacement sensitivity can change sign as a function of the probe size and is null for some critical sizes. In addition, we study the influence of the numerical aperture of the detection system, polarization, and the cross talk between position measurements in orthogonal directions. We finally discuss how these features should be taken into account in experimental designs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Backscattering position detection for photonic force microscopy

Volpe

Kozyreff

Petrov

2007

Journal of Applied Physics

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“…Figure 3a,c shows the schematic of the corresponding experiment using the total internal reflection at a glass prism. For this numerical experiment, we use parameters corresponding to real experiments manipulating particles with evanescent fields (for example see refs [57][58][59][60][61][62]. Namely, we consider radiation with the wavelength l ¼ 650 nm, a gold particle (e p ¼ À 12.2 þ 3i, m p ¼ 1) in water (e ¼ 1.77, m ¼ 1), and near-critical total internal reflection (the angle of incidence is y ¼ 51°¼ y c þ 1.5°) from the interface between heavy flint glass (e 1 ¼ 3.06, m 1 ¼ 1) and water.…”

Section: Article Nature Communications | Doi: 101038/ncomms4300mentioning

confidence: 99%

Extraordinary momentum and spin in evanescent waves

2014

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Momentum and spin represent fundamental dynamic properties of quantum particles and fields. In particular, propagating optical waves (photons) carry momentum and longitudinal spin determined by the wave vector and circular polarization, respectively. Here we show that exactly the opposite can be the case for evanescent optical waves. A single evanescent wave possesses a spin component, which is independent of the polarization and is orthogonal to the wave vector. Furthermore, such a wave carries a momentum component, which is determined by the circular polarization and is also orthogonal to the wave vector. We show that these extraordinary properties reveal a fundamental Belinfante's spin momentum, known in field theory and unobservable in propagating fields. We demonstrate that the transverse momentum and spin push and twist a probe Mie particle in an evanescent field. This allows the observation of 'impossible' properties of light and of a fundamental field-theory quantity, which was previously considered as 'virtual'.

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“…1), [6]. The relaxation time τ is also directly related to the "corner frequency" that is found in the frequency-response curve (power spectrum) commonly used for analyzing optical-tweezers experiments f c = (πτ ) −1 [10,11]. Note that, from the power spectrum, it is possible to extract only the corner frequency f c , which is a function of KD, and these two parameters cannot be extracted separately as in our formalism.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Dynamic analysis of a diffusing particle in a trapping potential

Lindner

Nir²,

Vivante³

et al. 2013

Phys. Rev. E

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The dynamics of a diffusing particle in a potential field is ubiquitous in physics, and it plays a pivotal role in single-molecule studies. We present a formalism for analyzing the dynamics of diffusing particles in harmonic potentials at low Reynolds numbers using the time evolution of the particle probability distribution function. We demonstrate the power of the formalism by simulation and by measuring and analyzing a nanobead tethered to a single DNA molecule. It allows one to simultaneously extract all the parameters that describe the system, namely, the diffusion coefficient and the restoring-force constant.

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Surface Plasmon Radiation Forces

Cited by 270 publications

References 34 publications

Backscattering position detection for photonic force microscopy

Backscattering position detection for photonic force microscopy

Extraordinary momentum and spin in evanescent waves

Dynamic analysis of a diffusing particle in a trapping potential

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