Progressive Self-Boosting Anapole-Enhanced Deep-Ultraviolet Third Harmonic during Few-Cycle Laser Radiation

authored by: Liping Shi, Andrey B. Evlyukhin, Carsten Reinhardt, Ihar Babushkin, Vladimir A. Zenin, Sven Burger, Radu Malureanu, Boris N. Chichkov, Uwe Morgner, Milutin Kovacev
Abstract: Nanoantennas made of high-index semiconductors with a strong nonlinearity and supported optical Mie-type resonances offer a promising alternative platform for nonlinear nanophotonics. In this Letter, we employ an array of amorphous silicon nanodisks with varying diameters to produce a broadband deep-ultraviolet third harmonic of a few-cycle Ti:sapphire oscillator. Ultrashort light pulses efficiently deposit their energy at the center of the disks where the electric field is strongly amplified by the anapole states. This leads to a progressive material modification in an extreme multishot (>1010 pulses) and a rather low fluence (<10-3 J/cm2) regime, drastically differing from other known mechanisms, such as nonthermal plasma annealing or thermal melting-induced recrystallization. We suggest that the material modification is due to femtosecond laser-induced excitation of dangling bonds, which leads to a gradual boosting of the third harmonic conversion efficiency and broadening of its spectral bandwidth.
Organisation(s): Institute of Quantum Optics
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
QuantumFrontiers
External Organisation(s): Bremen University of Applied Sciences
Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy im Forschungsbund Berlin e.V. (MBI)
University of Southern Denmark
Zuse Institute Berlin (ZIB)
Technical University of Denmark
Type: Article
Journal: ACS PHOTONICS
Volume: 7
Pages: 1655-1661
No. of pages: 7
ISSN: 2330-4022
Publication date: 15.07.2020
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Biotechnology, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
Electronic version(s): https://doi.org/10.1021/acsphotonics.0c00753 (Access: Closed)

BibTeX

@article{1bfa50e3c0894e47909c13e8fd1d24a5,
title = "Progressive Self-Boosting Anapole-Enhanced Deep-Ultraviolet Third Harmonic during Few-Cycle Laser Radiation",
abstract = "Nanoantennas made of high-index semiconductors with a strong nonlinearity and supported optical Mie-type resonances offer a promising alternative platform for nonlinear nanophotonics. In this Letter, we employ an array of amorphous silicon nanodisks with varying diameters to produce a broadband deep-ultraviolet third harmonic of a few-cycle Ti:sapphire oscillator. Ultrashort light pulses efficiently deposit their energy at the center of the disks where the electric field is strongly amplified by the anapole states. This leads to a progressive material modification in an extreme multishot (>1010 pulses) and a rather low fluence (<10-3 J/cm2) regime, drastically differing from other known mechanisms, such as nonthermal plasma annealing or thermal melting-induced recrystallization. We suggest that the material modification is due to femtosecond laser-induced excitation of dangling bonds, which leads to a gradual boosting of the third harmonic conversion efficiency and broadening of its spectral bandwidth.",
keywords = "all-dielectric nanoantennas, anapole mode, deep-ultraviolet, few-cycle laser, silicon photonics, third harmonic generation, ultrafast nonlinear optics",
author = "Liping Shi and Evlyukhin, {Andrey B.} and Carsten Reinhardt and Ihar Babushkin and Zenin, {Vladimir A.} and Sven Burger and Radu Malureanu and Chichkov, {Boris N.} and Uwe Morgner and Milutin Kovacev",
note = "Funding Information: The authors thank funding supports from Deutsche Forschungsgemeinschaft (DFG; KO 3798/4-1) and from the German Research Foundation under Germany{\textquoteright}s Excellence Strategy EXC-2123, Germany{\textquoteright}s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453) and Germany{\textquoteright}s Excellence Strategy within The Berlin Mathematics Research Center MATH+ (EXC-2046/1, Project ID 390685689), and the Lower Saxony through “Quanten und Nanometrologie” (QUANOMET, Project Nanophotonik). V.A.Z. acknowledges financial support from Villum Fonden (Grant No. 16498). The authors thank Dr. R{\'e}mi Colom from Zuse Institute Berlin for supporting numerical simulations. C.R. acknowledges the funding supports from DFG (German Research Foundation, Project ID RE3012/4-1 and RE3012/2-1).",
year = "2020",
month = jul,
day = "15",
doi = "10.1021/acsphotonics.0c00753",
language = "English",
volume = "7",
pages = "1655--1661",
journal = "ACS PHOTONICS",
issn = "2330-4022",
publisher = "American Chemical Society",
number = "7",
}