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Title: Tunable orbital angular momentum in high-harmonic generation

Abstract

Optical vortices are currently one of the most intensively studied topics in optics. These light beams, which carry orbital angular momentum (OAM), have been successfully utilized in the visible and infrared in a wide variety of applications. Moving to shorter wavelengths may open up completely new research directions in the areas of optical physics and material characterization. Here, we report on the generation of extreme-ultraviolet optical vortices with femtosecond duration carrying a controllable amount of OAM. From a basic physics viewpoint, our results help to resolve key questions such as the conservation of angular momentum in highly nonlinear light–matter interactions, and the disentanglement and independent control of the intrinsic and extrinsic components of the photon’s angular momentum at short-wavelengths. Finally, the methods developed here will allow testing some of the recently proposed concepts such as OAM-induced dichroism, magnetic switching in organic molecules and violation of dipolar selection rules in atoms.

Authors:
 [1];  [1];  [2];  [3];  [4];  [1];  [3];  [5];  [6];  [4];  [6];  [6];  [2];  [7];  [2];  [4];  [8]
  1. Elettra-Sincrotrone Trieste,Trieste (Italy)
  2. Univ. of Nova Gorica, Nova Gorica (Slovenia)
  3. The Ohio State Univ., Columbus, OH (United States)
  4. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  5. Imagine Optic, Orsay (France)
  6. Institute of Photonics and Nanotechnologies, Padova (Italy)
  7. Univ. Paris-Sud, Orsay (France)
  8. Elettra-Sincrotrone Trieste,Trieste (Italy); Univ. of Nova Gorica, Nova Gorica (Slovenia)
Publication Date:
Research Org.:
Elettra-Sincrotrone Trieste,Trieste (Italy); The Ohio State Univ., Columbus, OH (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1361172
Alternate Identifier(s):
OSTI ID: 1362024
Grant/Contract Number:
FG02-04ER15614
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 8; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; high-harmonic generation; nonlinear optics; ultrafast photonics

Citation Formats

Gauthier, David, Ribič, P. Rebernik, Adhikary, G., Camper, A., Chappuis, C., Cucini, R., DiMauro, L. F., Dovillaire, G., Frassetto, F., Géneaux, R., Miotti, P., Poletto, L., Ressel, B., Spezzani, C., Stupar, M., Ruchon, T., and De Ninno, Giovanni. Tunable orbital angular momentum in high-harmonic generation. United States: N. p., 2017. Web. doi:10.1038/ncomms14971.
Gauthier, David, Ribič, P. Rebernik, Adhikary, G., Camper, A., Chappuis, C., Cucini, R., DiMauro, L. F., Dovillaire, G., Frassetto, F., Géneaux, R., Miotti, P., Poletto, L., Ressel, B., Spezzani, C., Stupar, M., Ruchon, T., & De Ninno, Giovanni. Tunable orbital angular momentum in high-harmonic generation. United States. doi:10.1038/ncomms14971.
Gauthier, David, Ribič, P. Rebernik, Adhikary, G., Camper, A., Chappuis, C., Cucini, R., DiMauro, L. F., Dovillaire, G., Frassetto, F., Géneaux, R., Miotti, P., Poletto, L., Ressel, B., Spezzani, C., Stupar, M., Ruchon, T., and De Ninno, Giovanni. Wed . "Tunable orbital angular momentum in high-harmonic generation". United States. doi:10.1038/ncomms14971. https://www.osti.gov/servlets/purl/1361172.
@article{osti_1361172,
title = {Tunable orbital angular momentum in high-harmonic generation},
author = {Gauthier, David and Ribič, P. Rebernik and Adhikary, G. and Camper, A. and Chappuis, C. and Cucini, R. and DiMauro, L. F. and Dovillaire, G. and Frassetto, F. and Géneaux, R. and Miotti, P. and Poletto, L. and Ressel, B. and Spezzani, C. and Stupar, M. and Ruchon, T. and De Ninno, Giovanni},
abstractNote = {Optical vortices are currently one of the most intensively studied topics in optics. These light beams, which carry orbital angular momentum (OAM), have been successfully utilized in the visible and infrared in a wide variety of applications. Moving to shorter wavelengths may open up completely new research directions in the areas of optical physics and material characterization. Here, we report on the generation of extreme-ultraviolet optical vortices with femtosecond duration carrying a controllable amount of OAM. From a basic physics viewpoint, our results help to resolve key questions such as the conservation of angular momentum in highly nonlinear light–matter interactions, and the disentanglement and independent control of the intrinsic and extrinsic components of the photon’s angular momentum at short-wavelengths. Finally, the methods developed here will allow testing some of the recently proposed concepts such as OAM-induced dichroism, magnetic switching in organic molecules and violation of dipolar selection rules in atoms.},
doi = {10.1038/ncomms14971},
journal = {Nature Communications},
number = ,
volume = 8,
place = {United States},
year = {Wed Apr 05 00:00:00 EDT 2017},
month = {Wed Apr 05 00:00:00 EDT 2017}
}

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Cited by: 7works
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  • Optical vortices are currently one of the most intensively studied topics in optics. These light beams, which carry orbital angular momentum (OAM), have been successfully utilized in the visible and infrared in a wide variety of applications. Moving to shorter wavelengths may open up completely new research directions in the areas of optical physics and material characterization. Here, we report on the generation of extreme-ultraviolet optical vortices with femtosecond duration carrying a controllable amount of OAM. From a basic physics viewpoint, our results help to resolve key questions such as the conservation of angular momentum in highly nonlinear light–matter interactions,more » and the disentanglement and independent control of the intrinsic and extrinsic components of the photon’s angular momentum at short-wavelengths. The methods developed here will allow testing some of the recently proposed concepts such as OAM-induced dichroism, magnetic switching in organic molecules and violation of dipolar selection rules in atoms.« less
  • We study high harmonic generation produced by twisted laser pulses, with orbital angular momentum in the relativistic regime, for pulse propagation in underdense plasma. We consider fast time scale processes associated with an ultra-short pulse, where the ion motion can be neglected. We use both analytical models and numerical simulations using a relativistic particle-in-cell code. The present description is valid for relativistic laser intensities, when the normalized field amplitude is much larger than one, a ≫ 1. We also discuss two distinct processes associated with linear and circular polarization. Using both analytical solutions and particle-in-cell simulations, we are able tomore » show that, for laser pulses in a well defined Laguerre-Gauss mode, angular momentum conservation is observed during the process of harmonic generation. Intensity modulation of the harmonic spectrum is also verified, as imposed by the nonlinear time-scale for energy transfer between different harmonics.« less
  • We experimentally demonstrate multiple copies of optical orbital angular momentum (OAM) states through quasi-phase-matched (QPM) second-harmonic (SH) generation in a 2D periodically poled LiTaO{sub 3} (PPLT) crystal. Since the QPM condition is satisfied by involving different reciprocal vectors in the 2D PPLT crystal, collinear and noncollinear SH beams carrying OAMs of l{sub 2} are simultaneously generated by the input fundamental beam with an OAM of l{sub 1}. The OAM conservation law (i.e., l{sub 2} = 2l{sub 1}) holds well in the experiment, which can tolerate certain phase-mismatch between the interacting waves. Our results provide an efficient way to obtain multiple copies ofmore » the wavelength-converted OAM states, which can be used to enhance the capacity in optical communications.« less
  • We experimentally demonstrate the plasmon-assisted second-harmonic generation of an optical orbital angular momentum (OAM) beam. Because of the shape resonance, the plasmons in a periodic array of rectangular metal holes greatly enhance the nonlinear optical conversion of an OAM state. The OAM conservation (i.e., 2l{sub 1} = l{sub 2} with l{sub 1} and l{sub 2} being the OAM numbers of the fundamental and second-harmonic waves, respectively) holds well under our experimental configuration. Our results provide a potential way to realize nonlinear optical manipulation of an OAM mode in a nano-photonic device.
  • A scheme to generate intense coherent light that carries orbital angular momentum (OAM) at the fundamental wavelength of an x-ray free-electron laser (FEL) is described. The OAM light is emitted as the dominant mode of the system until saturation provided that the helical microbunching imposed on the electron beam is larger than the shot-noise bunching that leads to self-amplified emission. Operating at the fundamental, this scheme is more efficient than alternate schemes that rely on harmonic emission, and can be applied to x-ray FELs without using external optical mode conversion elements.