Polar molecules in selected quantum states can be guided, decelerated and trapped using electric fields created by microstructured electrodes on a chip. Here we demonstrate that transitions between two vibrational quantum states can be induced while the molecules are trapped above the chip. We use CO molecules, prepared in the J = 1 rotational level of the a a(3)Pi(1), v = 0 state and induce the transition to either the J = 1 or the J = 2 level in the vibrationally excited a(3)Pi(1), v = 1 state with pulsed, narrowband IR radiation. First, the vibrational excitation is studied using CO molecules in a freely propagating molecular beam, in a well-defined homogeneous electric field. Then, we demonstrate that the IR radiation can be coupled to CO molecules that are trapped less than 50 mu m above the chip by guiding molecules in the v = 0 level to the center of the chip where they are pumped to the v = 1 level. The molecules remain trapped and are then guided off the chip and state-selectively detected.

Vibrationally exciting molecules trapped on a microchip / Abel, Mj; Marx, S; Meijer, G; Santambrogio, Gabriele. - In: MOLECULAR PHYSICS. - ISSN 0026-8976. - 110:15-16(2012), pp. 1829-1837. [10.1080/00268976.2012.683885]

Vibrationally exciting molecules trapped on a microchip

SANTAMBROGIO, GABRIELE
2012

Abstract

Polar molecules in selected quantum states can be guided, decelerated and trapped using electric fields created by microstructured electrodes on a chip. Here we demonstrate that transitions between two vibrational quantum states can be induced while the molecules are trapped above the chip. We use CO molecules, prepared in the J = 1 rotational level of the a a(3)Pi(1), v = 0 state and induce the transition to either the J = 1 or the J = 2 level in the vibrationally excited a(3)Pi(1), v = 1 state with pulsed, narrowband IR radiation. First, the vibrational excitation is studied using CO molecules in a freely propagating molecular beam, in a well-defined homogeneous electric field. Then, we demonstrate that the IR radiation can be coupled to CO molecules that are trapped less than 50 mu m above the chip by guiding molecules in the v = 0 level to the center of the chip where they are pumped to the v = 1 level. The molecules remain trapped and are then guided off the chip and state-selectively detected.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11696/29439
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