Search

Searching. Please wait…

Enhancing and tailoring light-matter interaction in the near-infrared by all-dielectric metasurfaces supporting silicon-slot quasi-bound state in the continuum modes

Abstract: Light-matter interaction is crucial in many application domains of nanophotonics, including biosensing, trapping at the nanoscale, nonlinear optics, and lasing. Many approaches, mainly based on photonic and plasmonic resonant structures, have been investigated to enhance and tailor the interaction, but those based on all-dielectric metasurfaces have several unique advantages: low loss, easy excitation and readout, possibility of engineering the optical field distribution with many degrees of freedom, and electric tuning. Here we show that properly designed all-dielectric metasurfaces can support silicon-slot quasi-bound states in the continuum modes resonating in the near-infrared, strongly confining light in air and, consequently, enhancing light-matter interaction. Some samples of the designed metasurface have been fabricated in a silicon-on-sapphire wafer by e-beam lithography and reactive ion etching. The optical characterization of the chip has confirmed the excitation of the quasi-bound state in the continuum resonant modes, with measured Q-factor values exceeding 700.

Other conference communications or articles related to authors from the University of Cantabria

 Authorship: Algorri J.F., Zografopoulos D.C., Ding Y., Dmitriev V., López-Higuera J.M., Sánchez-Pena J.M., Andreani L.C., Galli M., Dell'Olio F.,

 Congress: Laser Resonators, Microresonators, and Beam Control (25º : 2023 : San Francisco, California)

 Publisher: SPIE Society of Photo-Optical Instrumentation Engineers

 Publication date: 15/03/2023

 No. of pages: 3

 Publication type: Comunicación a Congreso

 DOI: 10.1117/12.2648765

 ISSN: 0277-786X,1996-756X

Authorship

ZOGRAFOPOULOS, DIMITRIOS C.

DING, YUNHONG

DMITRIEV, VICTOR

JOSE MANUEL SANCHEZ PENA

ANDREANI, LUCIO C.

GALLI, MATTÉO

DELL'OLIO, FRANCESCO