Bragg-matching characterization of atomic coherence gratings in an electromagnetically induced transparency solid with a confocal scheme

High visibility first-order subwavelength interference based on light pulse storage via electromagnetically induced transparency

“…Three beams from a Coherent 899 dye ring laser operating at ~605.78 nm served as the signal beam E S , the coupling beam E C and the readout beam E R with their respective power of 16 mW, 30 mW and 30 mW. These beams could be temporally modulated in intensity and shifted in frequency independently by the corresponding acousto-optic modulators (not shown here), and they were polarized linearly and in parallel in such a way to guarantee an efficient EIT effect and storage efficiency 39 . A double-slit was placed at the front focal plane of lens L1.…”

“…We assume that the light field amplitude in the transverse dimension of the rear focal plane of lens L1, i.e., the transverse distribution of light field in the Pr:YSO crystal, is E j ( x , y ) (j = S , C , R , S ′) for the input signal, the coupling, the readout and the retrieved output signal beams, respectively. Under the paraxial approximation and after a light-pulse storage and retrieval process based on the EIT effect, the field amplitude of the retrieved output signal beam E S ′ ( x , y ) can be written as 38 , 39 : where the superscript ‘*’ denotes the complex conjugate, and ( x , y ) are the transverse coordinates in the rear focal plane of lens L1. Note that the relative light field distribution in the transverse dimension in our case is temporally stable in the rear focal plane of lens L1, therefore we drop the variables z and t in the expression of light field amplitude for clarity.…”

Multiplexed image storage by electromagnetically induced transparency in a solid

“…However, all of these classical techniques are not suitable for quantum state storage, as they apply dissipative or amplifying elements [14,15]. Hence, multiplexed storage of light pulses based on coherent light-matter processes from the background of quantum optics (e.g., EIT) gained considerable attention in recent years [16][17][18][19].…”

Superresolved optical imaging through higher-order spatial frequency harmonic generation without beating the diffraction limit of light

“…Three beams from a Coherent 899 dye ring laser operating at ∼ 605.78 nm served as the probe beam Ω S , the coupling beam Ω C and the readout beam Ω R with their respective power of 16 mW, 30 mW and 30 mW. These beams could be temporally modulated in intensity and shifted in frequency independently by the corresponding acousto-optic modulators (not shown here), and they were polarized linearly and in parallel in such a way to guarantee an efficient EIT effect and storage efficiency [25]. A 5-µs probe pulse, after transmitted through an object at the front focal plane of lens L1, became the object beam and interacted with the coupling beam in the Pr 3+ :YSO crystal under the EIT condition in the confocal Fourier plane, and the object field carrying the Fourier spatial frequency of the object was stored in Pr 3+ :YSO crystal by adiabatically switching off the coupling field.…”

“…Assuming that the light field amplitude on the confocal Fourier plane is E j (x, y) (j=S, C, R, S ′ ) for the object, the coupling, the readout and the retrieved signal beams, respectively. After a light-pulse storage and retrieval process under the phase-matching condition, the field amplitude of the retrieved signal beam E S ′ (x, y), that is also U F (x, y), can be written as [23,25]:…”