Patent ID: 6097532
Filing Date: 2000-08-01
Classification: G02F

Abstract:
A method for producing electromagnetically induced transparency in atoms of an isotope having nonzero nuclear spin, the method comprising the steps of:a) selecting the isotope such that the atoms of the isotope have electronic levels (.vertline.1>, .vertline.2>, and .vertline.3>, wherein:I) level .vertline.1> has the lowest energy of levels .vertline.1>, .vertline.2> and .vertline.3>;II) a transition between level .vertline.2> and level .vertline.1> is dipole forbidden;III) a transition between level .vertline.1> and level .vertline.3> is dipole allowed;IV) a transition between level .vertline.2> and level .vertline.3> is dipole allowed; andV) at least one of levels .vertline.1>, .vertline.2> and .vertline.3> is hyperfine split;VI) levels .vertline.1>, .vertline.2>, and .vertline.3> each have a center of gravity, hereinafter referred to as COG .vertline.1>, COG.vertline.2>, and COG .vertline.3>, respectively;b) applying to the atoms a coupling beam, wherein the coupling beam is substantially resonant with a first transition that extends between the COG .vertline.2> and the COG .vertline.3>;c) applying to the atoms a probe beam, wherein the probe beam is substantially resonant with a second transition that extends between the COG .vertline.1> and the COG .vertline.3>.