TY - GEN
T1 - Propagation characteristics of free-space terahertz electromagnetic pulses
AU - Chung, Young Seek
AU - Son, Joo Hiuk
AU - Cheon, Changyul
AU - Hahn, Song Yop
N1 - Publisher Copyright:
© 1999 IEEE.
PY - 1999
Y1 - 1999
N2 - Free-space terahertz electromagnetic pulses driven by femtosecond lasers have been utilized for studying the far-infrared and transient characteristics of various materials and applied to the terahertz imaging. Those experiments can be significantly improved by optimizing the terahertz pulse characteristics such as the pulse width, dispersion, frequency spectrum, etc. However, the characteristics have yet been studied theoretically because they are determined not only by the transport dynamics of photoconductivity generated carriers but also by the antenna and guiding structures. Using finite-difference time-domain (FD-TD) techniques, we characterize the dispersion properties of terahertz pulses at various spatial positions, for example, in the near- and far-field regions, and at the on- and off-axis points. We also consider the carrier transport effect on the dispersion.
AB - Free-space terahertz electromagnetic pulses driven by femtosecond lasers have been utilized for studying the far-infrared and transient characteristics of various materials and applied to the terahertz imaging. Those experiments can be significantly improved by optimizing the terahertz pulse characteristics such as the pulse width, dispersion, frequency spectrum, etc. However, the characteristics have yet been studied theoretically because they are determined not only by the transport dynamics of photoconductivity generated carriers but also by the antenna and guiding structures. Using finite-difference time-domain (FD-TD) techniques, we characterize the dispersion properties of terahertz pulses at various spatial positions, for example, in the near- and far-field regions, and at the on- and off-axis points. We also consider the carrier transport effect on the dispersion.
UR - http://www.scopus.com/inward/record.url?scp=0033331713&partnerID=8YFLogxK
U2 - 10.1109/CLEOPR.1999.814688
DO - 10.1109/CLEOPR.1999.814688
M3 - Conference contribution
AN - SCOPUS:0033331713
T3 - CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics
SP - 1111
EP - 1112
BT - CLEO/Pacific Rim 1999 - Pacific Rim Conference on Lasers and Electro-Optics
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 1999 Pacific Rim Conference on Lasers and Electro-Optics, CLEO/Pacific Rim 1999
Y2 - 30 August 1999 through 3 September 1999
ER -