Dinamika Internal dan Gaya Radiasi pada Molekul Diatomik akibat Interaksi dengan Sinar Laser

Abstract

Laser cooling of molecules is difficult to implement because of the complex internal structure. Ultracold molecules could potentially be used for a variety of applications and simulations. In this study simulated laser cooling by doppler cooling method on a molecule is described with three energy levels. Changes in the internal dynamics of the molecule and the radiation force examined with variations in the rate of spontaneous emission A2. Optimum radiation force can be achieved when the ratio of the spontaneous emission rate of a given A2 ≥ A1. This is consistent with the internal dynamics which discusses the distribution of the electron population towards stability faster and radiation force obtained with a large order. In theory the emission rate comparison A2 to A1 is 0.52412. This condition is at A2 < A1, it means that the molecule is more difficult cooled because the internal dynamics require a longer time to reach the level of stability and the resulting radiation force is smaller. Given strong laser field affects the frequency of the electrons in the molecule to transition to a certain energy level. For radiation force, the dipole force would be worth a minimum and a maximum value when the scattering force detuning at zero. Radiation force can reduce the effects of thermal motion of molecules in the molecular cooling processes, so it can be used in laser cooling.