Single state NH(X 3Σ−,v=0,J,N) preparation for state-to-state studies

Abstract

A new method is presented to examine state-to-state rotational energy transfer in ground state NH(X 3Σ−,v=0,J,N). NH(X 3Σ−) is generated via state selective stimulated emission pumping using the strongly forbidden NH(a 1Δ→X 3Σ−) intercombination transition around 794 nm after foregoing photodissociation of HN3 at a wavelength of 266 nm. Products are detected by laser induced fluorescence (LIF). Chemically relevant collision dynamics including spatial processes can be studied for the first time in v=0 of the electronic ground state. State-to-state rate constants for inelastic collisions of NH(X 3Σ−,v=0,J=3,N=3) with Ne are presented.

Population transfer of a NaH molecule via stimulated Raman adiabatic passage

“…In recent years, controlling the population transfer of atoms and molecules has attracted great interest from researchers for important applications in quantum computing [1], collision dynamics [2,3], molecular spectroscopy [4,5] and the optical control of chemical processes [6][7][8]. Several schemes have been proposed to steer coherent population transfer, such as adiabatic passage by light-induced potentials (APLIP) [9,10], stimulated Raman adiabatic passage (STIRAP) [11][12][13][14][15][16][17][18][19] and rapid adiabatic passage (RAP) [20].…”

Isotope Effects on Two-Photon Population Transfer Processes of HF and DF

“…Population transfer between two quantum states has been extensively studied in recent years for the important applications in molecular spectroscopy [1], chemical reaction dynamics [2], collision dynamics [3], and so on. Therefore, to obtain an efficient population transfer (close to 100%) from an initial state to a target state, various techniques are proposed, including the stimulated Raman adiabatic passage (STIRAP) [4], the temporal coherent control [5], the chirped adiabatic passage [6] etc.…”

Ultrashort-pulse-train pump and dump excitation of a diatomic molecule

“…Molecular dynamics can be controlled and monitored by laser pulses, which can guide the molecule from an initial state toward a final target state [1]. Preparing a molecule in a predetermined internal energy state finds application in quantum computing [2], molecular spectroscopy [3], collision dynamics [4], photochemistry [5], among others. Several methods to control molecular dynamics have been proposed, but those that rely on short pulses offer a significant advantage by avoiding losses induced by spontaneous emission.…”