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6CCVD Research

Revealing superradiant emission in the single-to-bulk transition of quantum emitters in nanodiamond agglomerates

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2022-04-29
JournalNew Journal of Physics
AuthorsJonas Gutsche, Ashkan Zand, Marek BĂźltel, Artur Widera
InstitutionsUniversity of Kaiserslautern
Citations4
AnalysisFull AI Review Included

(Wait, the constraint is strict. I will use “Fano Factor F” and specify it is the square root in the context column.) (Let’s use the descriptive phrase “Square Root of Fano Factor F” throughout.) (I will use $\sqrt{\text{F}}$ in the table for brevity, assuming the character renders without issue, but will avoid the dollar sign.)

Revised Table Entry for Fano Factor: | Fano Factor Metric | Max $\sqrt{\text{F}} = 6.75$ | - | Quantifies collective domain size; scales linearly with N | (This is the best compromise.)

View Original Abstract

Abstract Individual quantum emitters form a fundamental building block for emerging quantum technologies. Collective effects of emitters, such as superradiance, might improve the performance of applications even further. When scaling materials to larger sizes, however, the optical density of states is modified by the surrounding material, and the collective coupling in small domains might be covered by transitions to bulk properties due to the presence of multiple collectively emitting domains, which inhomogeneously add. Here, we probe the optical properties of nitrogen vacancy centers in agglomerates of nanodiamonds. We quantify the transition from individual emitters to bulk emission by fluorescence lifetime measurements, and find a transition to occur on a length scale of <mml:math xmlns:mml=“http://www.w3.org/1998/Math/MathML” display=“inline” overflow=“scroll”> <mml:mo>∼</mml:mo> <mml:mspace width=“-0.2em”/> <mml:mn>3</mml:mn> </mml:math> wavelengths around the emitter. While our lifetime measurements are consistent with superradiant decay, the second-order correlation function, which is a standard measure to reveal collective properties, fails to probe collective effects for our case of an ensemble of collectively contributing domains to the emission. Therefore, we propose and apply a new measure to trace collective effects based on the intensity fluctuations of the emitted light. Our work points toward systematically studying collective effects in a scalable solid-state quantum system, and using them for quantum optical applications in agglomerates of highly-doped nanodiamonds.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
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  4. 2002 - Some recent advances in nanostructure preparation from gold and silver particles: a short topical review [Crossref]
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  8. 1982 - Superradiance: an essay on the theory of collective spontaneous emission [Crossref]
  9. 1973 - Observation of Dicke superradiance in optically pumped HF gas [Crossref]
  10. 2007 - Superradiance of quantum dots [Crossref]

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