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1/ƒ noise for intermittent quantum dots exhibits nonstationarity and critical exponents

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dc.contributor.authorSadegh, Sanaz, author
dc.contributor.authorBarkai, Eli, author
dc.contributor.authorKrapf, Diego, author
dc.contributor.authorIOP Publishing Ltd., publisher
dc.date.accessioned2007-01-03T05:47:54Z
dc.date.available2007-01-03T05:47:54Z
dc.date.issued2014-11
dc.description.abstractThe power spectrum of quantum dot (QD) fluorescence exhibits 1/ƒ β noise, related to the intermittency of these nanosystems. As in other systems exhibiting 1/ƒ noise, this power spectrum is not integrable at low frequencies, which appears to imply infinite total power. We report measurements of individual QDs that address this long-standing paradox. We find that the level of 1/ƒ β noise decays with the observation time. The change of the spectrum with time places a bound on the total power. These observations are in stark contrast with most measurements of noise in macroscopic systems which do not exhibit any evidence for non-stationarity. We show that the traditional description of the power spectrum with a single exponent β is incomplete and three additional critical exponents characterize the dependence on experimental time.
dc.description.sponsorshipPublished with support from the Colorado State University Libraries Open Access Research and Scholarship Fund.
dc.format.mediumborn digital
dc.format.mediumarticles
dc.identifier.bibliographicCitationSadegh, Sanaz, Eli Barkai, and Diego Krapf, 1/f Noise for Intermittent Quantum Dots Exhibits Nonstationarity and Critical Exponents. New Journal of Physics 16, no. 11 (November 2014): 1-15. http://dx.doi.org/10.1088/1367-2630/16/11/113054
dc.identifier.doihttps://dx.doi.org/10.1088/1367-2630/16/11/113054
dc.identifier.urihttp://hdl.handle.net/10217/88130
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartofOpen Access Research and Scholarship Fund (OARS)
dc.rights.licenseThis article is open access and distributed under the terms and conditions of the Creative Commons Attribution 3.0 Unported (CC BY 3.0).
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subjectnanocrystals
dc.subject1/ƒ noise
dc.subjectpower spectrum
dc.subjectblinking
dc.title1/ƒ noise for intermittent quantum dots exhibits nonstationarity and critical exponents
dc.typeText

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