Antenna model for wire lasers.
An antenna model is proposed for long (L >> A) lasers with subwavelength cross sections (wire lasers). It is shown that the far-field pattern of the wire lasers is determined by the ratio of the wavelength to the length. The radiation of the wire laser is predicted to be concentrated in a narrow beam theta approximately radical(2lambda/L) for laser modes where the longitudinal phase velocity is in synchronism with the velocity of light in air. Experimental results obtained using a terahertz quantum cascade wire laser are in agreement with the model.
Orlova
E E
EE
Institute for Physics of Microstructures, Russian Academy of Sciences, Nishny Novgorod GSP-105. orlova@ipm.sci-nnov.ru
Hovenier
J N
JN
Klaassen
T O
TO
Kasalynas
I
I
Adam
A J L
AJ
Gao
J R
JR
Klapwijk
T M
TM
Williams
B S
BS
Kumar
S
S
Hu
Q
Q
Reno
J L
JL