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Abstract
Observation of surface field excitation by an obliquely incident wave inside a cylindrical two-dimensional periodic surface lattice is a step forward toward THz Cherenkov amplifiers. Here we observe and discuss this phenomenon, investigating it using different approaches. The results are compared, and it is shown that an increase in the lattice contrast results in excitation of surface fields by an obliquely incident wave resulting in the eigenmode formation. Measurements were conducted by studying forward transmission of the signal, and it is shown that the measured gaps in the spectra are associated with the eigenmode formation rather than band gap establishment.
Original language | English |
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Article number | 141106 |
Number of pages | 4 |
Journal | Applied Physics Letters |
Volume | 102 |
Issue number | 14 |
DOIs | |
Publication status | Published - Apr 2013 |
Keywords
- Surface waves
- Cherenkov
- millimetre-wave
- millimetre-wave source
- periodic surface lattice
- cylindrical cavity
- THz
- THz electron-beam source
- wave coupling
- oblique incident wave
- free electron devices
- free electron amplifier
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Dive into the research topics of 'Surface field excitation by an obliquely incident wave'. Together they form a unique fingerprint.Projects
- 2 Finished
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Pathways to Impact Award
Littlejohn, D., Cross, A., Phelps, A. & Ronald, K.
EPSRC (Engineering and Physical Sciences Research Council)
1/08/10 → 31/03/11
Project: Research
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Generation of high power, high frequency radiation using high brightness pseudospark-sourced beam
Cross, A., He, W., Phelps, A., Ronald, K. & Zhang, L.
EPSRC (Engineering and Physical Sciences Research Council)
1/10/08 → 31/03/12
Project: Research
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Periodic structures manufactured by 3D printing for electron beam excitation of coherent sub-Terahertz radiation
Alan Phelps (Keynote speaker)
30 Sep 2016Activity: Talk or presentation types › Invited talk
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Invited Seminar at Indian Physics Association, Pilani, India "Periodic surface lattice sources of mm-wave/THz radiation"
Alan Phelps (Invited speaker)
8 Mar 2014Activity: Talk or presentation types › Invited talk
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Ivan Konoplev
Alan Phelps (Host)
1 Jan 2012 → 31 Dec 2015Activity: Hosting a visitor types › Hosting an academic visitor