Details
| Original language | English |
|---|---|
| Pages (from-to) | 1655-1661 |
| Number of pages | 7 |
| Journal | ACS PHOTONICS |
| Volume | 7 |
| Issue number | 7 |
| Early online date | 16 Jun 2020 |
| Publication status | Published - 15 Jul 2020 |
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
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Biochemistry, Genetics and Molecular Biology(all)
- Biotechnology
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: ACS PHOTONICS, Vol. 7, No. 7, 15.07.2020, p. 1655-1661.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Progressive Self-Boosting Anapole-Enhanced Deep-Ultraviolet Third Harmonic during Few-Cycle Laser Radiation
AU - Shi, Liping
AU - Evlyukhin, Andrey B.
AU - Reinhardt, Carsten
AU - Babushkin, Ihar
AU - Zenin, Vladimir A.
AU - Burger, Sven
AU - Malureanu, Radu
AU - Chichkov, Boris N.
AU - Morgner, Uwe
AU - Kovacev, Milutin
N1 - Funding Information: The authors thank funding supports from Deutsche Forschungsgemeinschaft (DFG; KO 3798/4-1) and from the German Research Foundation under Germany’s Excellence Strategy EXC-2123, Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453) and Germany’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. Rémi 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).
PY - 2020/7/15
Y1 - 2020/7/15
N2 - 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.
AB - 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.
KW - all-dielectric nanoantennas
KW - anapole mode
KW - deep-ultraviolet
KW - few-cycle laser
KW - silicon photonics
KW - third harmonic generation
KW - ultrafast nonlinear optics
UR - http://www.scopus.com/inward/record.url?scp=85089094758&partnerID=8YFLogxK
U2 - 10.1021/acsphotonics.0c00753
DO - 10.1021/acsphotonics.0c00753
M3 - Article
AN - SCOPUS:85089094758
VL - 7
SP - 1655
EP - 1661
JO - ACS PHOTONICS
JF - ACS PHOTONICS
SN - 2330-4022
IS - 7
ER -