  We present a novel method to synthesize non-trivial speckles that can enable
superresolving second-order correlation imaging. The speckles acquire a unique
anti-correlation in the spatial intensity fluctuation by introducing the blue
noise spectrum to the input light fields through amplitude modulation.
Illuminating objects with the blue noise speckle patterns can lead to a
sub-diffraction limit imaging system with a resolution more than three times
higher than first-order imaging, which is comparable to the resolving power of
ninth order correlation imaging with thermal light. Our method opens a new
route towards non-trivial speckle generation by tailoring amplitudes of the
input light fields and provides a versatile scheme for constructing
superresolving imaging and microscopy systems without invoking complicated
higher-order correlations.
