Continuous-wave frequency upconversion with a molecular optomechanical nanocavity.

Autor: Chen W; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland., Roelli P; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland., Hu H; Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan 430205, China., Verlekar S; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland., Amirtharaj SP; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland., Barreda AI; Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, 07745 Jena, Germany., Kippenberg TJ; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland., Kovylina M; Nanophotonics Technology Center, Universitat Politècnica de València, 46022 Valencia, Spain., Verhagen E; Center for Nanophotonics, AMOLF, 1098 XG Amsterdam, Netherlands., Martínez A; Nanophotonics Technology Center, Universitat Politècnica de València, 46022 Valencia, Spain., Galland C; Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2021 Dec 03; Vol. 374 (6572), pp. 1264-1267. Date of Electronic Publication: 2021 Dec 02.
DOI: 10.1126/science.abk3106
Abstrakt: Coherent upconversion of terahertz and mid-infrared signals into visible light opens new horizons for spectroscopy, imaging, and sensing but represents a challenge for conventional nonlinear optics. Here, we used a plasmonic nanocavity hosting a few hundred molecules to demonstrate optomechanical transduction of submicrowatt continuous-wave signals from the mid-infrared (32 terahertz) onto the visible domain at ambient conditions. The incoming field resonantly drives a collective molecular vibration, which imprints a coherent modulation on a visible pump laser and results in upconverted Raman sidebands with subnatural linewidth. Our dual-band nanocavity offers an estimated 13 orders of magnitude enhancement in upconversion efficiency per molecule. Our results demonstrate that molecular cavity optomechanics is a flexible paradigm for frequency conversion leveraging tailorable molecular and plasmonic properties.
Databáze: MEDLINE
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