In recent years, coherent effects in atomic and molecular systems have been studied extensively, especially in several new classes of effects, such as lasing without inversion (LWI), electromagnetically induced transparency (EIT), coherent population trapping (CPT), AC Stark effect and Autler-Townes (AT) splitting in multilevel systems. The AC stark effect and Autler-Townes splitting in molecules have only been investigated recently. We demonstrate AC stark effect and Autler-Townes (AT) splitting in a lithium molecule using cw multi-photon spectroscopy. The excited upper level of the $G^{1}\\Pi_{g}$ is prepared by the optical-optical double resonance (OODR) excitation. The OODR line is split in the presence of a third coupling laser, which couples the upper level to an another intermediate level when the coupling laser is on or near resonance transition. The AT line shape consists of the superposition of $|M_{J}|$ components which have been resolved for $G^{1}\\Pi_{g}(v=12, J=3,f)$ . We find that the AT splittingis linearly proportional to $|M_{J}|$ , which allows the excitation of molecules with a selected $|M_{J}|$ level. The AC Stark shift of the OODR line is observed when the coupling laser is detuned from the resonance transition.In recent years, coherent effects in atomic and molecular systems have been studied extensively, especially in several new classes of effects, such as lasing without inversion (LWI), electromagnetically induced transparency (EIT), coherent population trapping (CPT), AC Stark effect and Autler-Townes (AT) splitting in multilevel systems. The AC stark effect and Autler-Townes splitting in molecules have only been investigated recently. We demonstrate AC stark effect and Autler-Townes (AT) splitting in a lithium molecule using cw multi-photon spectroscopy. The excited upper level of the $G^{1}\\Pi_{g}$ is prepared by the optical-optical double resonance (OODR) excitation. The OODR line is split in the presence of a third coupling laser, which couples the upper level to an another intermediate level when the coupling laser is on or near resonance transition. The AT line shape consists of the superposition of $|M_{J}|$ components which have been resolved for $G^{1}\\Pi_{g}(v=12, J=3,f)$. We find that the AT splittingis linearly proportional to $|M_{J}|$, which allows the excitation of molecules with a selected $|M_{J}|$ level. The AC Stark shift of the OODR line is observed when the coupling laser is detuned from the resonance transition.

Jan 1, 19990 citations

Optical Stark deceleration of cold molecules

P. F. Barker

Bulletin of the American Physical SocietyJun 8, 20070 citations

Autler–Townes splitting and the AC Stark effect in nonpolar molecules: Prospects for all-optical alignment

A. M. Lyyra, J. Qi, F. C. Spano

This paper describes an extension of the familiar coherence effects from atomic systems to the molecular regime. Such effects are inherent in the interaction of multiple laser fields with molecular systems. We have observed AutlerTownes splitting and the AC Stark shift in diatomic Lithium using the continuous wave all-optical triple resonance (AOTR) techniques. By using the AutlerTownes effect, we have partially resolved the magnetic sublevels of a molecular rovibrational level in a Doppler broadened sample, allowing all-optical alignment of the angular momentum in excited states of nonpolar molecules. The AutlerTownes effect in a molecular system extends the rovibrational state selectivity of the AOTR excitation technique to magnetic sublevels. PACS Nos.: 33.40tf, 42.50HzThis paper describes an extension of the familiar coherence effects from atomic systems to the molecular regime. Such effects are inherent in the interaction of multiple laser fields with molecular systems. We have observed AutlerTownes splitting and the AC Stark shift in diatomic Lithium using the continuous wave all-optical triple resonance (AOTR) techniques. By using the AutlerTownes effect, we have partially resolved the magnetic sublevels of a molecular rovibrational level in a Doppler broadened sample, allowing all-optical alignment of the angular momentum in excited states of nonpolar molecules. The AutlerTownes effect in a molecular system extends the rovibrational state selectivity of the AOTR excitation technique to magnetic sublevels. PACS Nos.: 33.40tf, 42.50Hz

Canadian Journal of PhysicsJan 1, 20011 citation

AC Stark effect in a spin-orbit mixed quantum states in a five-level molecular system coupled by three lasers

Jianbing Qi

Bulletin of the American Physical SocietyMay 24, 20160 citations

Observation of the Resonant Stark Effect at Optical Frequencies

Felix Schuda, Carlos R. Stroud, Michael Hercher

Elsevier eBooksJan 1, 19830 citations

G^{1}\\Pi_{g}

is prepared by the optical-optical double resonance (OODR) excitation. The OODR line is split in the presence of a third coupling laser, which couples the upper level to an another intermediate level when the coupling laser is on or near resonance transition. The AT line shape consists of the superposition of

|M_{J}|

components which have been resolved for

G^{1}\\Pi_{g}(v=12, J=3,f)

. We find that the AT splittingis linearly proportional to

|M_{J}|

, which allows the excitation of molecules with a selected

|M_{J}|

level. The AC Stark shift of the OODR line is observed when the coupling laser is detuned from the resonance transition.