Super-resolution imaging using the spatial-frequency filtered intensity fluctuation correlation

Generation of ideal thermal light in warm atomic vapor

“…Together with the detected photon rates of 3.4 × 10 5 counts/s, these results promise enhancement of a large number of applications in classical and quantum optics [8][9][10][11][12][13][14][15][16]. The presented source possesses several important advantages compared to conventional thermal light sources based on amplified spontaneous emission [12,[29][30][31] or parametric down conversion [10,26,28].…”

“…As such, this statistics naturally appears at thermal equilibrium. Ideal thermal radiation can be directly applied in diagnostics of quantum states and processes [8][9][10], enhancement of nonlinear effects and metrology [11][12][13], quantum imaging [14][15][16], generation of nonclassicality [17], or pioneering tests of quantum thermodynamics [18] and quantum key distribution [19].…”

“…Although such approach can emulate thermal light field with very high fidelity, it is technically limited in the achievable spectral bandwidths due to practically achievable disk rotation speeds, average grain spatial size and focal spot of the scattered laser beam to a few MHz range [23]. However, it is the actual spectral bandwidth which represents a crucial parameter for potential improvement of waste majority of applications of thermal light [8][9][10][11][12][13][14][15][16]. On one side it directly relates to the efficiency of various processes and on the other, it allows for increasing their repetition rates.…”

Modeling the behavior of signal-to-noise ratio for repeated snapshot imaging

“…Considering the identity of the two split beams used in traditional GI, second order auto-correlation of one beam should share the same merit of the cross correlation between the split beams from the same light source. Although the two characteristic properties of GI -'ghost' and super resolution -have been demonstrated by one-beam autocorrelation experiments [10,11], which shows that analysis on the second order autocorrelation should also apply to cross-correlation based GI, it has been pointed out that only the second order fluctuation correlation shares the exact same mechanism with GI [12].…”