Waveguide-based dielectric resonance structure: a theoretical analysis to change cell–substrate separation by a repulsive optical force

Hassanzadeh, Abdollah; Azami, Darya

doi:10.1364/josab.33.001971

Cited by 1 publication

(2 citation statements)

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“…In this paper, we are interested in p-polarisation since it has non-trivial longitudinal field vector, so from here we set E s = 0 and for simplicity set E p = 1 and n 1 = 1, but it is straightforward to discuss the general case (E s , E p = 0, and n 1 ≥ 1) using our approach. Note that (8) to (14) can also be derived directly from Maxwell's equations. We can see that there is phase difference between the transverse z component of the field vector and the longitudinal x component.…”

Section: Electromagnetic Fields Near Interfaces With Dissipationmentioning

confidence: 99%

“…After Ashkin's experiments, many interesting setups for optical manipulation have been proposed. Some of them function in the optical near field using evanescent waves and surface plasmon polaritons [8][9][10][11][12][13][14][15]. The optical near field has peculiar properties such as steep intensity gradients, large wavevectors compared to propagating field, and transverse circular polarisation.…”

Section: Introductionmentioning

confidence: 99%

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Dissipation effect on optical force and torque near interfaces

Oue

2019

J. Opt.

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The Fresnel-Snell law, which is one of the fundamental laws in optics and gives insights on the behaviour of light at interfaces, is violated if there exists dissipation in the transmitting media. In order to overcome this problem, we extend the angle of refraction from a real number to a complex number. We use this complexangle approach to analyse the behaviour of light at interfaces between lossy media and lossless media. We reveal that dissipation makes the wavenumber of the light exceed the maximum allowed at lossless interfaces. This is surprising because, in general, dielectric loss only change the intensity profiles of the light, so this excess wavenumber cannot be produced in the bulk even if there exists dielectric loss. Additionally, anomalous circular polarisation emerges with dissipation. The direction of the anomalous circular polarisation is transverse, whereas without dissipation the direction of circular polarisation has to be longitudinal. We also discuss how the excess wavenumber can increase optical force and how the anomalous circular polarisation can generate optical transverse torque. This novel state of light produced by dissipation will pave the way for a new generation of optical trapping and manipulation. ‡ Present address:

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Section: Electromagnetic Fields Near Interfaces With Dissipationmentioning

confidence: 99%