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RESEARCH PRODUCT
Controlling ground-state rotational dynamics of molecules by shaped femtosecond laser pulses
Olivier FaucherEdouard HertzMaurice RenardBruno Lavorelsubject
Wave packetOPTICALlaw.inventionsymbols.namesakeOpticsINDUCED POLARIZATION SPECTROSCOPYGAS-MIXTURESlawSTOKES-RAMAN SCATTERINGCOHERENCETEMPERATUREPhysicsINTERFERENCEbusiness.industryOrder (ring theory)Rotational–vibrational spectroscopyLaserPHASE MODULATIONAtomic and Molecular Physics and OpticsCENTRIFUGEFemtosecondsymbolsAtomic physicsGround stateRaman spectroscopybusinessExcitationQUANTUM CONTROLGENERATIONdescription
We report controlled excitation of ground-state rotational wave packet by pulse-shaping technique. The experiment is conducted in nitrogen $({\mathrm{N}}_{2})$ at room temperature and atmospheric pressure. A femtosecond laser pulse produces rotational coherences in the vibronic ground state of ${\mathrm{N}}_{2}$ through an impulsive Raman process. The laser pulse is tailored using a spatial light modulator producing spectral phase modulation. Periodic phase steps are applied in order to control the excitation of specific rotational Raman transitions. The outcome is the modification of the relative excitation between odd and even rotational states which allows the control of the symmetry and rephasing period of the wave packet.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-04-08 |