Rapid-phase modulation of terahertz radiation for high-speed terahertz imaging and spectroscopy.
Rapid voltage-controlled phase modulation of cw terahertz (THz) radiation is demonstrated. By transmitting an infrared beam through a lithium niobate phase modulator the phase of the THz radiation, which is generated by the photomixing of two infrared beams, can be directly modulated through a 2pi phase shift. The 100 kHz modulation rate that is demonstrated with this technique is approximately 3 orders of magnitude faster than what can be achieved by mechanical scanning.
Sinyukov
Alexander M
AM
Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.
Liu
Zhiwei
Z
Hor
Yew Li
YL
Su
Ke
K
Barat
Robert B
RB
Gary
Dale E
DE
Michalopoulou
Zoi-Heleni
ZH
Zorych
Ivan
I
Federici
John F
JF
Zimdars
David
D