首页 > 期刊 > 栏目列表 > 栏目 (Ultrafast Phenomena in Physics, Chemistry, and Biology)

摘要

We perform ultrafast transient absorption spectroscopy of oxy-hemoglobin by a pump-probe method with ultrashort laser pulses. Negative time-range of the observed traces, where the pump pulse precedes the probe pulse, is analyzed to study the electronic coherence dynamics between the excited state and the ground state, and the vibrational coherence in the electronic excited stat

PDF全文 Chinese Optics Letters | 2011,9(s1):s10605
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0 326 1797

摘要

Pulses with a tunable central wavelength from 278-310 nm reaching <27 fs duration and >1 \mu J energy are generated by non-collinear four-wave mixing in a 0.5-mm CaF2 crystal.

PDF全文 Chinese Optics Letters | 2011,9(s1):s10604
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0 322 1548

摘要

The pulse broadening and communication capacity in atmospheric turbulent and disperse channels are investigated. Models on pulse broadening are proposed, and the simulated results for a typical atmospheric condition and configuration are provided. The results show that the capacity of the system is affected mainly by atmospheric dispersion rather than atmospheric turbulence. Th

PDF全文 Chinese Optics Letters | 2011,9(s1):s10603
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0 354 2651

摘要

Cylindrical vector beams are described by the representation formalism of finite electromagnetic beams in free space. This is achieved by factorizing the field vector into a mapping matrix and a Jones-like vector. The vectorial property of a finite beam can be described by a degree of freedom of the mapping matrix that can be determined by the azimuthal angle of a fixed unit ve

PDF全文 Chinese Optics Letters | 2011,9(s1):s10602
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0 416 2475

摘要

We observe the instantaneous frequency and amplitude modulations of the C-C stretching mode with a central frequency of 1343 cm?1 in a poly (substituted thiophene) using 6.3 fs laser pulses by the method of real-time vibrational spectroscopy. Spectrogram analysis shows that both amplitude and instantaneous frequency of the mode with a central frequency of about 1343 cm?1 are mo

PDF全文 Chinese Optics Letters | 2011,9(s1):s10601
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0 300 1705
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