Articolo in rivista, 2020, ENG, 10.1364/OPTICA.403558

Electrically controlled waveguide polariton laser

Suarez-Forero, D. G.; Riminucci, F.; Ardizzone, V.; De Giorgi, M.; Dominici, L.; Todisco, F.; Lerario, G.; Pfeiffer, L. N.; Gigli, G.; Ballarini, D.; Sanvitto, D.

Inst Nanotechnol; Univ Salento; Lawrence Berkeley Natl Lab; Princeton Univ

Exciton-polaritons are mixed light-matter particles offering a versatile solid state platform to study many-body physical effects. In this work, we demonstrate an electrically controlled polariton laser, in a compact, easy-to-fabricate and integrable configuration, based on a semiconductor waveguide. Interestingly, we show that polariton lasing can be achieved in a system without a global minimum in the polariton energy-momentum dispersion. The cavity modes for the laser emission are obtained by adding couples of specifically designed diffraction gratings on top of the planar waveguide, forming an in-plane Fabry-Perot cavity. It is due to the waveguide geometry that we can apply a transverse electric field to finely tune the laser energy and quality factor of the cavity modes. Remarkably, we exploit the system sensitivity to the applied electric field to achieve an electrically controlled population of coherent polaritons. The precise control that can be reached with the manipulation of the grating properties and of the electric field provides strong advantages to this device in terms of miniaturization and integrability, two main features for the future development of coherent sources for polaritonic technologies. (c) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Optica 7 (11), pp. 1579–1586

Keywords

waveguide, polariton laser, grating, solid state, nanopatterning, Exciton-polaritons, electrical control

CNR authors

Lerario Giovanni, Suarez Forero Daniel Gustavo, Riminucci Fabrizio, Ardizzone Vincenzo, Sanvitto Daniele, Ballarini Dario, Gigli Giuseppe, Dominici Lorenzo, Todisco Francesco

CNR institutes

ID: 441884

Year: 2020

Type: Articolo in rivista

Creation: 2021-01-13 21:52:18.000

Last update: 2021-04-06 20:07:48.000

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:441884

DOI: 10.1364/OPTICA.403558

ISI Web of Science (WOS): 000593180100002