首页 > 期刊 > 栏目列表 > 栏目 (Spectroscopy, imaging, and sensing using terahertz radiation)

摘要

Terahertz (THz) spectra of bentazon are determined within the range of 0.3?2.4 THz at room temperature. Density functional methods are used to compute the THz spectra using three different programs: Gaussian03 for isolated-molecule form, DMol3 and CRYSTAL09 for solid-state forms. Among the three, the computed THz spectrum of CRYSTAL09 shows better bond length and angle agreemen

PDF全文 Chinese Optics Letters | 2011,9(11):110011
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0 642 2218

摘要

We investigate the diffusion interaction and quantitative analysis of zinc dialkyldithiophosphate (ZDDP) mixed with lube base oil (LBO) at different concentrations using terahertz time-domain spectroscopy (THz-TDS). When the concentration exceeds 6.78%, the characteristic absorption peaks exhibit significantly shift, and the absorption coefficient peak value is nonlinear agains

PDF全文 Chinese Optics Letters | 2011,9(11):110010
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0 308 2237

摘要

An overview of the major techniques to generate and detect THz radiation so far, especially the major approaches to generate and detect coherent ultra-short THz pulses using ultra-short pulsed laser, has been presented. And also, this paper, in particularly, focuses on broadband THz spectroscopy and addresses on a number of issues relevant to generation and detection of broadba

PDF全文 Chinese Optics Letters | 2011,9(11):110008
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0 452 3041

摘要

We demonstrate two distinct emerging terahertz (THz) biomedical imaging techniques. One is based on the use of a new single frequency THz quantum cascade laser and the other is based on broadband THz time domain spectrocopy. The first method is employed to derive a metastasis lung tissue imaging at 3.7 THz with clear contrast between cancerous and healthy areas. The second appr

PDF全文 Chinese Optics Letters | 2011,9(11):110009
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0 465 2783

摘要

Ultrafast electromagnetic waves radiated from semiconductor material under high electric fields and photoexcited by femtosecond laser pulses have been recorded by using terahertz time domain spectroscopy (THz-TDS). The waveforms of these electromagnetic waves reflect the dynamics of the photoexcited carriers in the semiconductor material, thus, THz-TDS provides a unique opportu

PDF全文 Chinese Optics Letters | 2011,9(11):110007
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0 345 2719

摘要

Three time-resolved terahertz (THz) spectroscopy methods (optical-pump/THz-probe spectroscopy, THz-pump/THz-probe spectroscopy, and THz-pump/optical-probe spectroscopy) are reviewed. These are used to characterize ultrafast dynamics in photo- or THz-excited semiconductors, superconductors, nanomaterials, and other materials. In particular, the optical-pump/THz-probe spectroscop

PDF全文 Chinese Optics Letters | 2011,9(11):110006
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0 330 2962
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