Terahertz (THz) radiation occupies a very large portion of the electromagnetic spectrum and has generated much recent interest due to its ability to penetrate deep into many organic materials without the damage associated with ionizing radiation such as x-rays. One path for generating copious amount of tunable narrow-band THz radiation is based on the Smith–Purcell free-electron laser (SPFEL) effect. In this paper we propose a simple concept for a compact two-stage tunable SPFEL operating in the super-radiant regime capable of radiating at the fundamental bunching frequency. We demonstrate its capabilities and performances using the conformal finite-difference time-domain electromagnetic solver VORPAL.

1.
M.
Tonouchi
,
Nat. Photonics
1
,
97
(
2007
).
2.
H. L.
Andrews
and
C. A.
Brau
,
Phys. Rev. ST Accel. Beams
7
,
070701
(
2004
).
3.
V.
Kumar
and
K. -J.
Kim
,
Phys. Rev. E
73
,
026501
(
2006
).
4.
J. M.
Wachtel
,
J. Appl. Phys.
50
,
49
(
1979
).
5.
H. L.
Andrews
and
C. A.
Brau
,
Phys. Rev. ST Accel. Beams
12
,
080703
(
2009
).
6.
J.
Gardelle
,
L.
Courtois
,
P.
Modin
, and
J. T.
Donohue
,
Phys. Rev. ST Accel. Beams
12
,
110701
(
2009
).
7.
S. J.
Smith
and
E. M.
Purcell
,
Phys. Rev.
92
,
1069
(
1953
).
8.
H. L.
Andrews
,
C. H.
Boulware
,
C. A.
Brau
, and
J. D.
Jarvis
,
Proceedings of the 26th International Free Electron Laser Conference
, Trieste, Italy, 29 August–3 September
2004
, p.
278
281
.
9.
D.
Li
,
K.
Imasaki
,
Z.
Yang
, and
G. S.
Park
,
Appl. Phys. Lett.
88
,
201501
(
2006
).
10.
A.
Kesar
,
R.
Marsh
, and
R.
Temkin
,
Phys. Rev. ST Accel. Beams
9
,
022801
(
2006
).
11.
Y.
Li
and
K. -J.
Kim
,
Appl. Phys. Lett.
92
,
014101
(
2008
).
12.
Z.
Shi
,
Z.
Yang
,
F.
Lan
,
X.
Gao
,
Z.
Liang
, and
D.
Li
,
Nucl. Instrum. Methods Phys. Res. A
607
,
367
(
2009
).
13.
C.
Nieter
and
J. R.
Cary
,
J. Comput. Phys.
196
,
448
(
2004
).
14.
J. T.
Donohue
and
J.
Gardelle
,
Phys. Rev. ST Accel. Beams
8
,
060702
(
2005
).
15.
C. R.
Prokop
,
P.
Piot
,
M. C.
Lin
, and
P.
Stoltz
,
Proceedings of the 31st Free Electron Laser Conference
, Liverpool, UK, 23–28 August
2009
p.
180
183
.
16.
H. P.
Freund
and
T. M.
Abu-Elfadl
,
IEEE Trans. Plasma Sci.
32
,
1015
(
2004
).
17.
J. S.
Nodvick
and
D. S.
Saxon
,
Phys. Rev.
96
,
180
(
1954
).
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