scholarly journals Optimal coherent control of coherent anti-Stokes Raman scattering: Signal enhancement and background elimination

2012 ◽  
Vol 136 (14) ◽  
pp. 144114 ◽  
Author(s):  
Fang Gao ◽  
Feng Shuang ◽  
Junhui Shi ◽  
Herschel Rabitz ◽  
Haifeng Wang ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Coherent Control ◽  
Signal Enhancement ◽  
Background Elimination ◽  
Anti Stokes ◽  
Scattering Signal

Time-Domain Coherent Anti-Stokes Raman Scattering Signal Detection for Terahertz Vibrational Spectroscopy Using Chirped Femtosecond Pulses

2010 ◽  
Vol 3 (7) ◽  
pp. 072401 ◽  
Author(s):  
Masahiko Tani ◽  
Toshiyuki Koizumi ◽  
Hisashi Sumikura ◽  
Mariko Yamaguchi ◽  
Kohji Yamamoto ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Signal Detection ◽  
Vibrational Spectroscopy ◽  
Time Domain ◽  
Femtosecond Pulses ◽  
Anti Stokes ◽  
Scattering Signal

SELECTIVE EXCITATION OF COHERENT ANTI-STOKES RAMAN SCATTERING VIA PHASE STEP MODULATION

2013 ◽  
Vol 22 (01) ◽  
pp. 1350002 ◽  
Author(s):  
SHUWU XU ◽  
YUNXIA HUANG ◽  
XIANMING JI
Keyword(s):  
Raman Scattering ◽  
Pulse Shaping ◽  
Coherent Control ◽  
Energy Levels ◽  
Selective Excitation ◽  
Phase Step ◽  
Shaping Technique ◽  
Large Bandwidth ◽  
Promising Solution ◽  
Anti Stokes

It is known that femtosecond coherent anti-Stokes Raman scattering (CARS) method suffers from the drawback of poor selectivity between neighboring Raman energy levels due to the large bandwidth of the pulses. Quantum coherent control based on the ultrashort pulse shaping technique is a promising solution. In this paper, we propose a simple approach to realize the selective excitation of CARS spectra by shaping both the probe and pump pulses with the π phase step. By phase step modulation of the probe pulse, we show that the CARS signals between neighboring Raman energy levels can be greatly narrowed and differentiated, and then selective excitation can be realized by modulating both the probe and pump pulses. Finally, the mechanism of the selective excitation by population transfer is briefly discussed.

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