Pseudomomentum transfer from evanescent waves to atoms measured by saturated absorption spectroscopy

Matsudo, Tatsuo; Takahara, Y.; Hori, Hirokazu; Sakurai, Tsunehisa

doi:10.1016/s0030-4018(97)00420-3

Cited by 27 publications

(30 citation statements)

References 12 publications

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“…which is described by the canonical momentum (3.9) and is observed experimentally [31][32][33]. Comparing equations (3.8)-(3.10), together with the singular character of the canonical Abraham-type momentum P A [65], confirms that the canonical picture is more natural for the description of the Minkowski-type wave momentum, while the kinetic approach is more suitable for the characterization of the Abraham-type energy fluxes, see table 1.…”

Section: Energy Group Velocity and Momentum Of Sppssupporting

confidence: 53%

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Optical momentum and angular momentum in complex media: from the Abraham–Minkowski debate to unusual properties of surface plasmon-polaritons

2017

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We examine the momentum and angular momentum (AM) properties of monochromatic optical fields in dispersive and inhomogeneous isotropic media, using the Abraham-and Minkowski-type approaches, as well as the kinetic (Poynting-like) and canonical (with separate spin and orbital degrees of freedom) pictures. While the kinetic Abraham-Poynting momentum describes the energy flux and the group velocity of the wave, the Minkowski-type quantities, with proper dispersion corrections, describe the actual momentum and AM carried by the wave. The kinetic Minkowski-type momentum and AM densities agree with phenomenological results derived by Philbin. Using the canonical spinorbital decomposition, previously used for free-space fields, we find the corresponding canonical momentum, spin and orbital AM of light in a dispersive inhomogeneous medium. These acquire a very natural form analogous to the Brillouin energy density and are valid for arbitrary structured fields. The general theory is applied to a non-trivial example of a surface plasmon-polariton (SPP) wave at a metal-vacuum interface. We show that the integral momentum of the SPP per particle corresponds to the SPP wave vector, and hence exceeds the momentum of a photon in the vacuum. We also provide the first accurate calculation of the transverse spin and orbital AM of the SPP. While the intrinsic orbital AM vanishes, the transverse spin can change its sign depending on the SPP frequency. Importantly, we present both macroscopic and microscopic calculations, thereby proving the validity of the general phenomenological results. The microscopic theory also predicts a transverse magnetization in the metal (i.e. a magnetic moment for the SPP) as well as the corresponding direct magnetization current, which provides the difference between the Abraham and Minkowski momenta.

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Section: Energy Group Velocity and Momentum Of Sppssupporting

confidence: 53%

“…(iv) SPPs exhibit non-trivial momentum and AM properties, including super-momentum [31][32][33][34][35] and transverse spin AM [35, 41-43, 46, 65-68].…”

Section: About This Workmentioning

confidence: 99%

Optical momentum and angular momentum in complex media: from the Abraham–Minkowski debate to unusual properties of surface plasmon-polaritons

2017

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“…(10), (15), (36)), energy flow (Eqs. (17), (19)) and its group velocity (11), orbital (28) and spin (30) parts of the electromagnetic momentum, spin (23), (25) and orbital (34), (37) angular momenta in the TM SPP fields. Additionally, the SPP-induced magnetization of the conductive medium 2 is phenomenologically described by Eqs.…”

Section: Discussion and Illustrationsmentioning

confidence: 99%

Electromagnetic dynamical characteristics of a surface plasmon-polariton

Bekshaev

Mikhaylovskaya

2019

Optik

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We consider an electromagnetic field near the interface between two media with arbitrary real frequency-dependent permittivities and permeabilities, under conditions supporting the surface plasmon-polariton (SPP) propagation. The dispersion of the electric and magnetic properties is taken into account based on the recent approach for description of the spin and momentum of electromagnetic field in complex media [Phys. Rev. Lett. 119, 073901 (2017); New J. Phys., 19, 123014 (2017)]. It involves the Minkowski momentum decomposition into spin and orbital parts with the dispersion-modified permittivities and permeabilities. Explicit expressions are derived for spatial densities of the energy, energy flow, spin and orbital momenta and angular momenta of the transverse-magnetic (TM) SPP field. The expressions are free from nonphysical singularities; the only singular contribution describes a strictly localized surface part of the spin momentum that can be associated with the magnetization current in the conductive component of the SPP-supporting structure. On this ground, a phenomenological theory of the SPP-induced magnetization (predicted earlier based on the simplified microscopic approach) is outlined. Possible modifications and generalizations, including the transverse-electric (TE) SPP waves, are discussed. IntroductionDuring the past decades, a significant interest has been attracted to the study of localized optical fields associated with interfacial regions between nanostructured metals and dielectrics [1][2][3][4][5][6]. Especially, the running evanescent surface waves (surface plasmon-polaritons, SPP) are intensively investigated in connection with the optical nano-probing and precise optical manipulation. Additionally, the SPP fields pave new ways for the light wave-guiding, switching and controlling by sub-wavelength elements, which is crucial for further microminiaturizing of optical information devices and systems. Many applications are stimulated by the unique dynamical properties of the evanescent waves and SPPs, in particular, the transverse spin and momentum [7-9], the special spin-momentum locking [9,10], nonreciprocity and unidirectional propagation [9][10][11][12].Earlier, the wide application of SPP-based techniques was restricted by the rather special requirements to materials that support efficient SPP generation and propagation [2][3][4][5]. However, with advent of a novel class of engineered composite materials, including the metamaterials, lefthanded materials, sculptured films, etc. [4,[13][14][15][16], almost any combination of the electric and magnetic parameters in the optical frequency range is becoming available [4,10,[17][18][19], which offers additional and unexpected possibilities for the research and applications. As a rule, exclusive properties of new materials are accompanied by the strong dispersion (frequency dependence of the

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“…These quantities are due, respectively, to the invariance under spatial parallel-displacement and rotational transform of a specific local atom-plus-surface system. We have already reported an experimental demonstration of pseudo-momentum transfer from evanescent waves to atoms via resonant absorption process near a planar dielectric surface by means of a high-resolution laser spectroscopy at the Cs-D 2 line (Matsudo et al, 1997;Matsudo et al, 1998). In these experiments, the atomic motion, i.e.…”

Section: Properties Of Optical Near-field Interactions and Observationsmentioning

confidence: 99%

State‐selective optical near‐field resonant ionization spectroscopy of atoms near a dielectric surface

Ohdaira

Kijima

Terasawa

et al. 2001

Journal of Microscopy

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SummarySpin-sensitive optical near-field microscopy and spectroscopy are proposed based on the study on the conserved quantities in optical near-field interactions of atoms with dielectric surfaces. A two-step photoionization spectra of Cs atoms resolving hyperfine structures are demonstrated near a planar dielectric surface by using evanescent waves. These techniques of state/spin-selective excitation and highly sensitive detection, combined with the techniques of optical pumping, will open up possibilities of space-and polarization-sensitive detection of optical near-fields using atomic probes. This novel method provides us with a useful technique for the observation of polarization nature of the optical near-field and controlling the spin states of mesoscopic electronic systems.

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Pseudomomentum transfer from evanescent waves to atoms measured by saturated absorption spectroscopy

Cited by 27 publications

References 12 publications

Optical momentum and angular momentum in complex media: from the Abraham–Minkowski debate to unusual properties of surface plasmon-polaritons

Optical momentum and angular momentum in complex media: from the Abraham–Minkowski debate to unusual properties of surface plasmon-polaritons

Electromagnetic dynamical characteristics of a surface plasmon-polariton

State‐selective optical near‐field resonant ionization spectroscopy of atoms near a dielectric surface

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