A Homonuclear Molecule with a Permanent Electric Dipole Moment

Li, W.; Pohl, Thomas; Rost, Jan M.; Rittenhouse, Seth T.; Sadeghpour, H. R.; Nipper, J.; Butscher, Björn; Balewski, Jonathan B.; Bendkowsky, Vera; Löw, Robert; Pfau, Tilman

doi:10.1126/science.1211255

Cited by 161 publications

(195 citation statements)

References 33 publications

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“…The recent experimental progress in preparing, detecting and probing the properties of non-polar ultralong-range Rydberg molecules [11,14,[21][22][23] has opened the doorway for a variety of possibilities to create novel species where atoms, molecules and even mesoscopic quantum systems are bound to Rydberg atoms. Therefore, the understanding and control of the properties of these hybrid Rydberg systems is of essential importance.…”

Section: Discussionmentioning

confidence: 99%

Ultralong-range Rydberg molecules in combined electric and magnetic fields

Kurz

Schmelcher

2014

J. Phys. B: At. Mol. Opt. Phys.

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We investigate the impact of combined electric and magnetic fields on the structure of ultralongrange polar Rydberg molecules. Our focus is hereby on the parallel as well as the crossed field configuration taking into account both the s-wave and p-wave interactions of the Rydberg electron and the neutral ground state atom. We show the strong impact of the p-wave interaction on the ultralong-range molecular states for a pure B-field configuration. In the presence of external fields the angular degrees of freedom acquires vibrational character and we encounter two-and three-dimensional oscillatory adiabatic potential energy surfaces for the parallel and crossed field configuration, respectively. The equilibrium configurations of local potential wells can be controlled via the external field parameters for both field configurations depending of the specific degree of electronic excitation. This allows to tune the molecular alignment and orientation. The resulting electric dipole moment is in the order of several kDebye and the rovibrational level spacings are in the range of 2 − 250 MHz. Both properties are analyzed with of varying field strengths.

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Section: Discussionmentioning

confidence: 99%

Ultralong-range Rydberg molecules in combined electric and magnetic fields

Kurz

Schmelcher

2014

J. Phys. B: At. Mol. Opt. Phys.

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“…In molecules with a permanent dipole moment, the first term will dominate, and the higher-order terms can be neglected. However, many molecules have no dipole moment and do not exhibit dipolar transitions, 42 such as the homonuclear diatomic molecules (H 2 ), oxygen (O 2 ), and nitrogen (N 2 ). Larger molecules like carbon dioxide (CO 2 ), methane (CH 4 ), and benzene (C 6 H 6 ) also possess no dipole moment because of their symmetrical geometry.…”

mentioning

confidence: 99%

Extraordinary Light-Induced Local Angular Momentum near Metallic Nanoparticles

Alabastri¹,

Yang²,

Manjavacas

et al. 2016

ACS Nano

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The intense local field induced near metallic nanostructures provides strong enhancements for surfaceenhanced spectroscopies, a major focus of plasmonics research over the past decade. Here we consider that plasmonic nanoparticles can also induce remarkably large electromagnetic field gradients near their surfaces. Sizeable field gradients can excite dipole-forbidden transitions in nearby atoms or molecules and provide unique spectroscopic fingerprinting for chemical and bimolecular sensing. Specifically, we investigate how the local field gradients near metallic nanostructures depend on geometry, polarization, and wavelength. We introduce the concept of the local angular momentum (LAM) vector as a useful figure of merit for the design of nanostructures that provide large field gradients. This quantity, based on integrated fields rather than field gradients, is particularly well-suited for optimization using numerical grid-based full wave electromagnetic simulations. The LAM vector has a more compact structure than the gradient matrix and can be straightforwardly associated with the angular momentum of the electromagnetic field incident on the plasmonic structures.

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“…Since the first calculation of Rydberg molecular potential curves in 2000 by Greene and coworkers [10], Rydberg molecules have been extensively investigated both theoretically and experimentally [14][15][16][17] due to their extraordinary properties such as huge size, large dipole moment, weak bounding energy and long lifetime. In particular, in some fast developing area of quantum physics, Rydberg molecules are more suitable than Rydberg atoms for quantum manipulation with electric field [18,19].…”

Section: Introductionmentioning

confidence: 99%

“…For a better understanding of the mechanism and further manipulations of Rydberg molecules, coherent transfer of initially free pairs of Rb(5s) atoms to Rydberg molecules (Rb*+Rb) have been demonstrated experimentally [24]. Very recently permanent electric dipole moment of a homonuclear Rydberg molecule has been observed [18] to has the order of 1 Debye even for highly symmetric case of Rb(ns)+Rb(5s) which further pave the way for possible experimental manipulation of this type of molecules.…”

Section: Introductionmentioning

confidence: 99%