Selective excitation and detection of higher-order doughnut laser modes as an incoherent superposition of two petals modes in a digital laser resonator

2015 ◽  
Author(s):  
Sandile Ngcobo ◽  
Teboh Bell ◽  
Igor A. Litvin ◽  
Darryl Naidoo ◽  
Kamel Ait-Ameur ◽  
...  
Keyword(s):  
Selective Excitation ◽  
Higher Order ◽  
Laser Resonator ◽  
Laser Modes

scholarly journals Efficient Electron Injection into Plasma Waves using Higher-Order Laser Modes

2006 ◽  
Author(s):  
P. Michel ◽  
C. B. Schroeder ◽  
B. A. Shadwick ◽  
E. Esarey ◽  
W. P. Leemans
Keyword(s):  
Electron Injection ◽  
Plasma Waves ◽  
Higher Order ◽  
Laser Modes

Selective excitation of higher order modes in hollow-core PCF via prism-coupling

2014 ◽  
Vol 39 (13) ◽  
pp. 3736 ◽  
Author(s):  
Barbara M. Trabold ◽  
David Novoa ◽  
Amir Abdolvand ◽  
Philip St.J. Russell
Keyword(s):  
Selective Excitation ◽  
Higher Order ◽  
Hollow Core ◽  
Higher Order Modes ◽  
Prism Coupling

scholarly journals Filtering higher-order laser modes using leaky plasma channels

2018 ◽  
Vol 25 (1) ◽  
pp. 013103 ◽  
Author(s):  
B. Z. Djordjević ◽  
C. Benedetti ◽  
C. B. Schroeder ◽  
E. Esarey ◽  
W. P. Leemans
Keyword(s):  
Higher Order ◽  
Plasma Channels ◽  
Laser Modes

scholarly journals Assessing the plasmonics of gold nano-triangles with higher order laser modes

2012 ◽  
Vol 3 ◽  
pp. 674-683 ◽  
Author(s):  
Laura E Hennemann ◽  
Andreas Kolloch ◽  
Andreas Kern ◽  
Josip Mihaljevic ◽  
Johannes Boneberg ◽  
...  
Keyword(s):  
Electric Field ◽  
Optical Microscope ◽  
Higher Order ◽  
Glass Substrates ◽  
Sers Substrates ◽  
Laser Focus ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
Laser Modes

Regular arrays of metallic nano-triangles – so called Fischer patterns – are fabricated by nano-sphere lithography. We studied such gold nano-triangle arrays on silicon or glass substrates. A series of different samples was investigated with a parabolic mirror based confocal microscope where the sample is scanned through the laser focus. By employing higher order laser modes (azimuthally and radially polarised laser beams), we can excite the Fischer patterns using either a pure in-plane (x,y) electric field or a strongly z-directional (optical axis of the optical microscope) electric field. We collected and evaluated the emitted luminescence and thereby investigated the respectively excited plasmonic modes. These varied considerably: firstly with the light polarisation in the focus, secondly with the aspect ratio of the triangles and thirdly with the employed substrate. Moreover, we obtained strongly enhanced Raman spectra of an adenine (sub-)monolayer on gold Fischer patterns on glass. We thus showed that gold Fischer patterns are promising surface-enhanced Raman scattering (SERS) substrates.

scholarly journals Digital laser for on-demand intracavity selective excitation of second harmonic higher-order modes

2020 ◽  
Vol 28 (11) ◽  
pp. 16907
Author(s):  
Teboho Bell ◽  
Mosima Kgomo ◽  
Sandile Ngcobo
Keyword(s):  
Second Harmonic ◽  
Selective Excitation ◽  
Higher Order ◽  
On Demand ◽  
Higher Order Modes

Higher-order fractal laser modes

2005 ◽  
Author(s):  
G.S. McDonald ◽  
G.H.C. New ◽  
G.P. Karman ◽  
J.P. Woerdman
Keyword(s):  
Higher Order ◽  
Laser Modes
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