Metasurface-stabilized optical microcavities.

Autor: Ossiander M; John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, MA, 02138, USA. mossiander@g.harvard.edu., Meretska ML; John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, MA, 02138, USA., Rourke S; John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, MA, 02138, USA.; University of Waterloo, Waterloo, ON, N2L 3G1, Canada., Spägele C; John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, MA, 02138, USA., Yin X; John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, MA, 02138, USA., Benea-Chelmus IC; John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, MA, 02138, USA.; Hybrid Photonics Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland., Capasso F; John A. Paulson School of Engineering and Applied Sciences, Harvard University, 29 Oxford St, Cambridge, MA, 02138, USA. capasso@seas.harvard.edu.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Feb 27; Vol. 14 (1), pp. 1114. Date of Electronic Publication: 2023 Feb 27.
DOI: 10.1038/s41467-023-36873-7
Abstrakt: Cavities concentrate light and enhance its interaction with matter. Confining to microscopic volumes is necessary for many applications but space constraints in such cavities limit the design freedom. Here we demonstrate stable optical microcavities by counteracting the phase evolution of the cavity modes using an amorphous Silicon metasurface as cavity end mirror. Careful design allows us to limit the metasurface scattering losses at telecom wavelengths to less than 2% and using a distributed Bragg reflector as metasurface substrate ensures high reflectivity. Our demonstration experimentally achieves telecom-wavelength microcavities with quality factors of up to 4600, spectral resonance linewidths below 0.4 nm, and mode volumes below [Formula: see text]. The method introduces freedom to stabilize modes with arbitrary transverse intensity profiles and to design cavity-enhanced hologram modes. Our approach introduces the nanoscopic light control capabilities of dielectric metasurfaces to cavity electrodynamics and is industrially scalable using semiconductor manufacturing processes.
(© 2023. The Author(s).)
Databáze: MEDLINE
Externí odkaz: