دورية أكاديمية
Demonstration of sub-luminal propagation of single-cycle terahertz pulses for particle acceleration
| العنوان: | Demonstration of sub-luminal propagation of single-cycle terahertz pulses for particle acceleration |
|---|---|
| المؤلفون: | Walsh, D.A., Lake, D.S., Snedden, E.W., Cliffe, M.J., Graham, D.M., Jamison, S.P. |
| سنة النشر: | 2017 |
| المجموعة: | Lancaster University: Lancaster Eprints |
| الوصف: | The sub-luminal phase velocity of electromagnetic waves in free space is generally unobtainable, being closely linked to forbidden faster than light group velocities. The requirement of sub-luminal phase-velocity in laser-driven particle acceleration schemes imposes a limit on the total acceleration achievable in free space, and necessitates the use of dispersive structures or waveguides for extending the field-particle interaction. We demonstrate a travelling source approach that overcomes the sub-luminal propagation limits. The approach exploits ultrafast optical sources with slow group velocity propagation, and a group-to-phase front conversion through nonlinear optical interaction. The concept is demonstrated with two terahertz generation processes, nonlinear optical rectification and current-surge rectification. We report measurements of longitudinally polarised single-cycle electric fields with phase and group velocity between 0.77c and 1.75c. The ability to scale to multi-megavolt-per-metre field strengths is demonstrated. Our approach paves the way towards the realisation of cheap and compact particle accelerators with femtosecond scale control of particles. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://eprints.lancs.ac.uk/id/eprint/125961/1/Walsh_travellingwaveTHz_NatComms2017.pdfTest; Walsh, D.A. and Lake, D.S. and Snedden, E.W. and Cliffe, M.J. and Graham, D.M. and Jamison, S.P. (2017) Demonstration of sub-luminal propagation of single-cycle terahertz pulses for particle acceleration. Nature Communications, 8 (1): 421. ISSN 2041-1723 |
| الإتاحة: | https://eprints.lancs.ac.uk/id/eprint/125961Test/ https://eprints.lancs.ac.uk/id/eprint/125961/1/Walsh_travellingwaveTHz_NatComms2017.pdfTest |
| حقوق: | creative_commons_attribution_4_0_international_license |
| رقم الانضمام: | edsbas.C355137 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |