Dielectric relaxation of the extended hydration sheathe of DNA in the THz frequency region

Nonmonotonic Hydration Behavior of Bovine Serum Albumin in Alcohol/Water Binary Mixtures: A Terahertz Spectroscopic Investigation

“…[48,49] In brief, a7 80 nm Er-doped fiber laser [< 100 fs pulse width (FWHM), 100 MHz repetition rate] was split into pump and probe beams of nearly equal power ( % 10 mW) by using ap olarizing beam splitter.T he pump beam excited the THz emitter antenna and produced THz radiation having ab andwidth of about 3.0 THz (> 60 dB). [48,49] In brief, a7 80 nm Er-doped fiber laser [< 100 fs pulse width (FWHM), 100 MHz repetition rate] was split into pump and probe beams of nearly equal power ( % 10 mW) by using ap olarizing beam splitter.T he pump beam excited the THz emitter antenna and produced THz radiation having ab andwidth of about 3.0 THz (> 60 dB).…”

“…THz time-domain spectroscopy (TTDS) measurements were performed with ac ommercial THz spectrophotometer (TERA K8, Menlo Systems) and ad etailed description of this spectrophotometer can be found in our earlier publications. [48,49] In brief, a7 80 nm Er-doped fiber laser [< 100 fs pulse width (FWHM), 100 MHz repetition rate] was split into pump and probe beams of nearly equal power ( % 10 mW) by using ap olarizing beam splitter.T he pump beam excited the THz emitter antenna and produced THz radiation having ab andwidth of about 3.0 THz (> 60 dB). This THz radiation after transmitting through the sample was focused on aT Hz detector antenna that was gated by the probe laser beam.…”

Controllable terahertz conductivity in single walled carbon nanotube/polymer composites

“…The frequency dependent complex refractive index and the complex dielectric constants for the composite films are deduced by numerically solving Fresnel's transmission coefficient for each film by using the THz transmission spectra. 25,26 Special care has also been taken account for the thickness distribution of different films during calculation of frequency dependent optical properties. The difference between the theoretical (ðH theory ðxÞ) and experimental whereñðxÞ is the complex refractive index with nðxÞ as its real part and kðxÞ as its imaginary part,ẽðxÞ is the complex dielectric constant of the system, e 1 is the infinite dielectric constant, e 0 is the permittivity of free space, x is the angular frequency of radiation, andrðxÞ is the complex conductivity of the system with r real ðxÞ and r ima ðxÞ representing its real and imaginary parts, respectively.…”

Experimental studies of the possibilities of diagnosing caries in the solid tissues of a tooth by means of terahertz radiation

“…3 If one simultaneously uses information concerning the reflection spectra of a substance and concerning the temporal shapes of the reflected pulses in the THz region, it is possible to obtain an image that allows one to determine the internal structure and composition of an object composed of several layers of dielectrics. 5,6 As has been mentioned, THz radiation can be used for biomedical diagnosis 1,7-15 -in particular, to diagnose carious damage of teeth. [9][10][11][12][13][14][15] Caries is a widespread disease, and therefore early detection of latent caries is very important, since timely intervention can prevent its development at an early stage.…”