Superresolution based on coherent thermal radiation with selective information.

Area of Science:

• Optical microscopy
• Superresolution imaging
• Quantum optics

Background:

• Traditional optical microscopy is limited by the Abbe diffraction limit.
• Previous superresolution techniques often focused on maximizing information capacity.
• The role of information zone selection in surpassing diffraction limits requires further investigation.

Purpose of the Study:

• To reexamine overlooked superresolution methods in optical microscopy.
• To demonstrate that maximizing information capacity is not essential for surpassing the Abbe diffraction limit.
• To propose a novel approach for achieving superresolution in one-dimensional systems.

Main Methods:

• Analysis of information capacity and spatial resolution in one-dimensional systems.
• Far-field imaging with selective information zone selection.
• Utilizing coherent thermal radiative sources and surface phonon polaritons.
• Employing a dielectric microsphere to enhance phase differences.

Main Results:

• Superresolution beyond the Abbe diffraction limit is achievable without maximizing information capacity.
• λ/2.6 superresolution demonstrated for two coherent thermal radiative sources.
• Superresolution better than λ/4 achieved using a dielectric microsphere.
• The proposed method is applicable to 1D arrays of thermal radiative sources.

Conclusions:

• Selective information zone selection is a viable strategy for superresolution imaging.
• The presented method offers a practical approach to enhance spatial resolution in thermal imaging.
• This work provides new insights into overcoming the fundamental limits of optical resolution.