Efficient Upper-Excited State Fluorescence in an Organic Hyperbolic Metamaterial

Yufei Shen, Yixin Yan, Alyssa N. Brigeman, Hoyeon Kim, Noel Christopher Giebink

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Upper-excited state emission is not usually observed from molecules owing to competition with much faster nonradiative relaxation pathways; however, it can be made more efficient by modifying the photonic density of states to enhance the radiative decay rate. Here, we show that embedding the small molecule zinc tetraphenylporphyrin (ZnTPP) in a hyperbolic metamaterial enables an ∼18-fold increase in fluorescence intensity from the second singlet excited state (S2) relative to that from the lowest singlet excited state (S1). By varying the number of periods in the HMM stack, we are able to systematically tune the ZnTPP fluorescence spectrum from red (dominated by emission from S1) to blue (dominated by emission from S2) with an instrument-limited decay lifetime <10 ps. Our results are consistent with a broadband Purcell enhancement in the radiative rate of both transitions predicted via transfer matrix modeling and point to a general opportunity to harness upper-excited states for spectrally tunable, ultrafast fluorescence via radiative decay engineering.

Original languageEnglish (US)
Pages (from-to)1693-1698
Number of pages6
JournalNano letters
Volume18
Issue number3
DOIs
StatePublished - Mar 14 2018

Fingerprint

Metamaterials
Excited states
Fluorescence
fluorescence
excitation
Zinc
zinc
harnesses
Molecules
decay
embedding
Photonics
decay rates
molecules
engineering
photonics
broadband
life (durability)
augmentation
zinc tetraphenylporphyrin

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Shen, Yufei ; Yan, Yixin ; Brigeman, Alyssa N. ; Kim, Hoyeon ; Giebink, Noel Christopher. / Efficient Upper-Excited State Fluorescence in an Organic Hyperbolic Metamaterial. In: Nano letters. 2018 ; Vol. 18, No. 3. pp. 1693-1698.
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Efficient Upper-Excited State Fluorescence in an Organic Hyperbolic Metamaterial. / Shen, Yufei; Yan, Yixin; Brigeman, Alyssa N.; Kim, Hoyeon; Giebink, Noel Christopher.

In: Nano letters, Vol. 18, No. 3, 14.03.2018, p. 1693-1698.

Research output: Contribution to journalArticle

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AU - Shen, Yufei

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AU - Brigeman, Alyssa N.

AU - Kim, Hoyeon

AU - Giebink, Noel Christopher

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