Breaking the Diffraction Barrier: Optical Microscopy on a Nanometric Scale. Betzig, E., Trautman, J. K., Harris, T. D., Weiner, J. S., & Kostelak, R. L. Science, 251(5000):1468--1470, March, 1991.
Breaking the Diffraction Barrier: Optical Microscopy on a Nanometric Scale [link]Paper  doi  abstract   bibtex   
In near-field scanning optical microscopy, a light source or detector with dimensions less than the wavelength (λ) is placed in close proximity (λ/50) to a sample to generate images with resolution better than the diffraction limit. A near-field probe has been developed that yields a resolution of ∼12 nm (∼λ/43) and signals ∼104- to 106-fold larger than those reported previously. In addition, image contrast is demonstrated to be highly polarization dependent. With these probes, near-field microscopy appears poised to fulfill its promise by combining the power of optical characterization methods with nanometric spatial resolution.
@article{betzig_breaking_1991,
	title = {Breaking the {Diffraction} {Barrier}: {Optical} {Microscopy} on a {Nanometric} {Scale}},
	volume = {251},
	copyright = {1991 by the American Association for the Advancement of Science},
	issn = {0036-8075, 1095-9203},
	shorttitle = {Breaking the {Diffraction} {Barrier}},
	url = {http://science.sciencemag.org/content/251/5000/1468},
	doi = {10.1126/science.251.5000.1468},
	abstract = {In near-field scanning optical microscopy, a light source or detector with dimensions less than the wavelength (λ) is placed in close proximity (λ/50) to a sample to generate images with resolution better than the diffraction limit. A near-field probe has been developed that yields a resolution of ∼12 nm (∼λ/43) and signals ∼104- to 106-fold larger than those reported previously. In addition, image contrast is demonstrated to be highly polarization dependent. With these probes, near-field microscopy appears poised to fulfill its promise by combining the power of optical characterization methods with nanometric spatial resolution.},
	language = {en},
	number = {5000},
	urldate = {2016-03-22TZ},
	journal = {Science},
	author = {Betzig, E. and Trautman, J. K. and Harris, T. D. and Weiner, J. S. and Kostelak, R. L.},
	month = mar,
	year = {1991},
	pmid = {17779440},
	pages = {1468--1470}
}

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