Communication modes in scalar diffraction
2008 (English)In: Optik (Stuttgart), ISSN 0030-4026, Vol. 119, no 3, 103-111 p.Article in journal (Refereed) Published
The communication modes are a useful concept in studies of optical resolution, wave propagation, and image synthesis. We present an overview of earlier results on the communication modes in scalar diffraction theory. Besides the general theory, the modes are reviewed for the far-field and Fresnel regimes, and new eigenequations are derived for wide-angle diffraction. We prove a conjugate relationship between the transmitting and receiving modes in a general symmetric system. We also suggest an approximate method for far-field and Fresnel domain propagation, in which propagation amounts to a rotation of each mode in the complex plane. The main focus is on the near-field communication modes, where we present numerical examples of the modes and coupling strengths for a near-field geometry with a sub-wavelength size receiving domain. These results provide insights, for example, into the understanding of near-field scanning probe techniques.
Place, publisher, year, edition, pages
2008. Vol. 119, no 3, 103-111 p.
wave optics; diffraction; propagation; optical information; near fields
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-10276DOI: 10.1016/j.ijleo.2006.07.009ISI: 000253496600001ScopusID: 2-s2.0-38549134300OAI: oai:DiVA.org:kth-10276DiVA: diva2:213891
QC 201008022009-04-292009-04-292010-12-06Bibliographically approved