Terahertz image of a gingko leaf taken at 2.7 THz (right) and visible optical image taken with an 8 bit CCD camera for comparison (left). From Ref. 41. Copyright © 2005 by Elsevier B. V. Reprinted by permission of Elsevier B. V.
Two-dimensional real-time terahertz imaging system using the EO sampling technique. From Ref. 42. Copyright © 1999 by IEEE. Reprinted by permission of IEEE.
Frequency-dependent spatial resolution of one-dimensional terahertz images. Each frequency component was extracted from a terahertz pulse measurement after Fourier transformation. “Integrated” refers to the amplitude from the whole frequency components of a pulse. From Ref. 44. Copyright © 2004 by Optical Society of Korea. Reprinted by permission of Optical Society of Korea.
A typical terahertz time-domain spectroscopy system consisting of a femtosecond laser, generator, detector, and delay line.
(a) Measured terahertz pulses without (solid line) and with (dashed line) the sample under study. (b) Spectral amplitudes and phases of terahertz pulses obtained from a fast Fourier transformation. From Ref. 17. Copyright © 2007 by American Institute of Physics. Reprinted by permission of American Institute of Physics.
Refractive indices and power absorptions of water (open circles) and electrolytes in LB medium (solid squares). The solid lines represent the modified double Debye model fits. From Ref. 17. Copyright © 2007 by American Institute of Physics. Reprinted by permission of American Institute of Physics.
Temperature-dependent power absorptions and refractive indices of water.
Absorption spectra of poly[C]-poly[G] films with thicknesses of (a) and (b) and modeling results. From Ref. 59. Copyright © 2003 by Institute of Physics Publishing. Reprinted by permission of Institute of Physics Publishing.
Transmission spectra of nucleobases: (a) adenine, (b) guanine, (c) cytosine, (d) uracil, and (e) thymine. From Ref. 64. Copyright © 2005 by Elsevier B. V. Reprinted by permission of Elsevier B. V.
Absorption spectra for Trp-Gly, Gly-Trp, Gly-Gly-Val, and Val-Gly-Gly (Trp, tryptopan; Gly, glycine; Val, valine) obtained at 77 K. From Ref. 72. Copyright © 2003 by Elsevier B. V. Reprinted by permission of Elsevier B. V.
(a) Photomicrograph and (b) terahertz image for invasive ductal carcinoma illustrate the method of comparing shapes of tumor regions [black outline in (a)]. Delineated regions (red) for (c) photomicrograph and (d) terahertz image. From Ref. 80. Copyright © 2006 by RSNA. Reprinted by permission of RSNA.
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