Compact fiber-coupled terahertz spectroscopy system pumped at 800 nm wavelength.

Photonic terahertz (THz) technology using femtosecond (fs) lasers has a great potential in a wide range of applications, such as non-destructive testing of objects or spectroscopic identification of chemical substances. For industrial purposes, a THz system has to be compact and easily implementable into the particular application. Therefore, fiber-coupled THz systems are the key to a widespread use of THz technology.

High-speed terahertz time-domain spectroscopy of cyclotron resonance in pulsed magnetic field.

We present time-resolved cyclotron resonance spectra of holes in p-Ge measured during single magnetic field pulses by using a rapid-scanning, fiber-coupled terahertz time-domain spectroscopy system. The key component of the system is a rotating monolithic delay line featuring four helicoid mirror surfaces. It allows measurements of THz spectra at up to 250 Hz repetition rate.

Self-concept: a cross-cultural study.

Self-concept differences between 190 American and 98 Danish 5th and 6th grade suburban students were examined in light of known societal and educational differences. Danish males and American females reported significantly higher self-confidence in personal attributes; American students reported higher achieving in school scores than Danish students. Results are discussed in the contex of cultural differences; further areas of investigation are offered.