TY - JOUR

T1 - Nanoscale Broadband Deep-Ultraviolet Light Source from Plasmonic Nanoholes

AU - Shi, Liping

AU - Andrade, José R.C.

AU - Yi, Juemin

AU - Marinskas, Marius

AU - Reinhardt, Carsten

AU - Almeida, Euclides

AU - Morgner, Uwe

AU - Kovacev, Milutin

N1 - Funding information: The authors thank funding supports from Deutsche For-schungsgemeinschaft (DFG; KO 3798/4-1) and from German Research Foundation under Germany’s Excellence Strategy-EXC-2123 and Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC 2122, Project ID 390833453); Lower Saxony through “Quanten und Nano-metrologie” (QUANOMET, Project Nanophotonik). C.R. is grateful for the funding support from “Hochpraezises Laser-drucken von Nanopartikel Metaoberflaechen for die Kontrolle von Licht, Sensorik und Nanolaser” - “High-Precision Laser Printing of Nanoparticle Metasurfaces for Control of Light, Sensors, and Nanolaser” (RE3012/4-1). “Silber-Nanodraht-Hyperlinsen” - “Silver Nanowire Hyperlenses” (RE3012/2-1).

PY - 2019/4/17

Y1 - 2019/4/17

N2 - We employ a broadband Ti:sapphire femtosecond oscillator to simultaneously launch two localized surface plasmon modes in rectangular plasmonic nanoholes. The resonant frequencies of these two modes match well with our laser spectrum. As a result, the nanoholes do not only efficiently boost the third harmonic radiation intensity, but also significantly broaden the harmonic's bandwidth, producing a nanoscale deep-ultraviolet light source in the range of 240 to 300 nm. Due to the involvement of two modes, the third harmonic beam becomes elliptically polarized and reaches its maximum intensity when laser polarization direction is 60° with respect to the long edges, rather than the commonly used 90°.

AB - We employ a broadband Ti:sapphire femtosecond oscillator to simultaneously launch two localized surface plasmon modes in rectangular plasmonic nanoholes. The resonant frequencies of these two modes match well with our laser spectrum. As a result, the nanoholes do not only efficiently boost the third harmonic radiation intensity, but also significantly broaden the harmonic's bandwidth, producing a nanoscale deep-ultraviolet light source in the range of 240 to 300 nm. Due to the involvement of two modes, the third harmonic beam becomes elliptically polarized and reaches its maximum intensity when laser polarization direction is 60° with respect to the long edges, rather than the commonly used 90°.

KW - Babinet-inverted metasurfaces

KW - broadband deep-ultraviolet

KW - nonlinear plasmonics

KW - substrate-free plasmonic nanoapertures

KW - third harmonic generation

UR - http://www.scopus.com/inward/record.url?scp=85063140926&partnerID=8YFLogxK

U2 - 10.1021/acsphotonics.9b00127

DO - 10.1021/acsphotonics.9b00127

M3 - Article

AN - SCOPUS:85063140926

VL - 6

SP - 858

EP - 863

JO - ACS Photonics

JF - ACS Photonics

SN - 2330-4022

IS - 4

ER -