We propose a method to enhance the resolution and break the diffraction limit. The superresolution imaging is realized by incorporating total internal reflection (TIR) illumination with a passive spatial frequency shift mechanism. Meanwhile, TIR supplies a surface field with a limited penetration depth, which demonstrates that the axial resolution can be improved simultaneously. The superresolution capability is confirmed both theoretically and experimentally. Compared with microfiber-based former work, this idea possesses promising merits, providing a wider viewing field and a simpler configuration for variable illumination orientations, thereby implying abundant application potentials.
© 2013 Optical Society of America
Original Manuscript: May 10, 2013
Revised Manuscript: June 10, 2013
Manuscript Accepted: June 11, 2013
Published: July 9, 2013
Vol. 8, Iss. 8 Virtual Journal for Biomedical Optics
Xiang Hao, Cuifang Kuang, Yanghui Li, and Xu Liu, "Evanescent-wave-induced frequency shift for optical superresolution imaging," Opt. Lett. 38, 2455-2458 (2013)