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Terahertz (THz) radiation, which is electromagnetic radiation in a
frequency int- val from 0.3 to 10 THz (1 mm-30 ?m wavelength), is
the next frontier in science and technology. This band occupies a
large portion of the electromagnetic sp- trum between the infrared
and microwave bands. Basic research, new initiatives, and
developments in advanced sensing and imaging technology with regard
to the THz band remain unexplored compared to the relatively
well-developed science and technology in the microwave and optical
frequencies. Historically, THz technologies were used mainly within
the astronomy c- munity for studying the background of cosmic
far-infrared radiation, and by the laser-fusion community for the
diagnostics of plasmas. Since the ?rst demonstration of THz wave
time-domain spectroscopy in the late 1980s, there has been a series
of signi?cant advances (particularly in recent years) as more
intense THz sources and higher sensitivity detectors provide new
opportunities for understanding the basic science in the THz
frequency range.
Terahertz (THz) radiation, which is electromagnetic radiation in a
frequency int- val from 0.3 to 10 THz (1 mm-30 ?m wavelength), is
the next frontier in science and technology. This band occupies a
large portion of the electromagnetic sp- trum between the infrared
and microwave bands. Basic research, new initiatives, and
developments in advanced sensing and imaging technology with regard
to the THz band remain unexplored compared to the relatively
well-developed science and technology in the microwave and optical
frequencies. Historically, THz technologies were used mainly within
the astronomy c- munity for studying the background of cosmic
far-infrared radiation, and by the laser-fusion community for the
diagnostics of plasmas. Since the ?rst demonstration of THz wave
time-domain spectroscopy in the late 1980s, there has been a series
of signi?cant advances (particularly in recent years) as more
intense THz sources and higher sensitivity detectors provide new
opportunities for understanding the basic science in the THz
frequency range.
As a bridge between electronics and photonics, terahertz science
and technology has made tremendous progress in the past decades.
While terahertz wave generation from gas, solid and plasma with
femtosecond laser excitation has been widely used, terahertz liquid
photonics is a newly emerging topic in recent years. This book
includes the most recent experimental results, theoretical
analysis, and simulated calculations on terahertz emission and
detection from liquid materials under ultrashort-pulse laser
excitation, providing readers a comprehensive understanding of
current developments in terahertz liquid photonics. By comparing
with traditional sources, distinctive properties of terahertz wave
generation from liquids are discussed in detail, which provides a
new perspective in exploring laser-matter interactions.
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