کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9786246 | 1512668 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Towards a FAST CARS anthrax detector: coherence preparation using simultaneous femtosecond laser pulses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Maximizing the molecular response to coherent anti-Stokes Raman spectroscopy (CARS) requires optimizing the preparation of a vibrational quantum coherence. We simulate the amount of laser-induced coherence prepared in a three-level system modeled after dipicolinic acid (DPA), a marker molecule for bacterial spores. The level spacings and decoherence times were chosen to agree with experimental data observed from DPA. Nearly-maximal vibrational coherences can be induced for 150 fs optical pulses, despite the very fast dephasing rates of the electronic transitions. It is also shown that pulse propagation effects play an important role in the development of coherence throughout an extended sample, due to nonlinear index effects of the molecule at the laser frequencies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optics Communications - Volume 244, Issues 1â6, 3 January 2005, Pages 423-430
Journal: Optics Communications - Volume 244, Issues 1â6, 3 January 2005, Pages 423-430
نویسندگان
G. Beadie, Z.E. Sariyanni, Y.V. Rostovtsev, T. Opatrny, J. Reintjes, M.O. Scully,