Adaptive sampling dual terahertz comb spectroscopy using dual free-running femtosecond lasers

T Yasui, R Ichikawa, YD Hsieh, K Hayashi… - Scientific reports, 2015 - nature.com
Terahertz (THz) dual comb spectroscopy (DCS) is a promising method for high-accuracy,
high-resolution, broadband THz spectroscopy because the mode-resolved THz comb …

Real-time absolute frequency measurement of continuous-wave terahertz radiation based on dual terahertz combs of photocarriers with different frequency spacings

T Yasui, K Hayashi, R Ichikawa, H Cahyadi… - Optics …, 2015 - opg.optica.org
Real-time measurement of the absolute frequency of continuous-wave terahertz (CW-THz)
radiation is required for characterization and frequency calibration of practical CW-THz …

Ultra-broadband terahertz absorbers based on 4× 4 cascaded metal-dielectric pairs

Y Guo, L Yan, W Pan, B Luo, X Luo - Plasmonics, 2014 - Springer
We present an ultra-broadband metamaterial absorber in the terahertz regime based on the
proposed 4× 4 cascaded metal-dielectric pairs, which would help to reduce the demand for …

Terahertz comb spectroscopy traceable to microwave frequency standard

YD Hsieh, Y Iyonaga, Y Sakaguchi… - IEEE Transactions …, 2013 - ieeexplore.ieee.org
The fine-structured spectrum of a terahertz (THz) frequency comb has been observed using
asynchronous-optical-sampling THz time-domain spectroscopy with an extended time …

Computational investigation on the chiral differentiation of D-and L-penicillamine by β-cyclodextrin

F Huang, S Zhuang, W Liu, L Lin, L Sun - Spectrochimica Acta Part A …, 2021 - Elsevier
The identification of chiral penicillamine (Pen) is of great significance for clinical medication
safety. The host-guest systems formed by enantiomers and macromolecule can be applied …

High-precision frequency measurements in the THz spectral region using an unstabilized femtosecond laser

H Füser, R Judaschke, M Bieler - Applied Physics Letters, 2011 - pubs.aip.org
We perform high-precision frequency measurements in the THz frequency range using an
unstabilized femtosecond laser. A simple and flexible algorithm is used to correct the …

Tunable THz spectrum analyzer with hyperspectral resolution

X He, M Yao, C Qian, L Meng, X Liu, W Tang… - Chinese Optics …, 2024 - opg.optica.org
We present a tunable terahertz (THz) spectrum analyzer with hyperspectral resolution
formed from electrically tunable metamaterial and plasmonic structures. As few as eight …

Terahertz frequency combs: Theoretical aspects and applications

H Füser, M Bieler - Journal of Infrared, Millimeter, and Terahertz Waves, 2014 - Springer
We review recent work on THz frequency combs generated by femtosecond lasers. An
overview about the underlying theory and application examples for the analysis of THz …

Terahertz frequency counter with a fractional frequency uncertainty at the 10-17 level

H Ito, S Nagano, M Kumagai, M Kajita… - Applied Physics …, 2013 - iopscience.iop.org
We have developed an ultra-accurate THz frequency counter based on a photocarrier
frequency comb in a photoconductive antenna using a femtosecond-pulse mode-locked …

Terahertz frequency counter based on a semiconductor-superlattice harmonic mixer with four-octave measurable bandwidth and 16-digit precision

S Nagano, M Kumagai, H Ito, Y Hanado, T Ido - Metrologia, 2021 - iopscience.iop.org
We have developed a broadband and high-precision terahertz (THz) frequency counter
based on a semiconductor-superlattice harmonic mixer (SLHM). Comparison of two THz …