Enhancement and electric charge-assisted tuning of nonlinear light generation in bipolar plasmonics

Wei Ding, Liangcheng Zhou, Stephen Y. Chou

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We propose and experimentally demonstrate a new plasmonic nonlinear light generation (NLG) structure, termed plasmonic-enhanced, charge-assisted second-harmonic generator (p-CASH), that not only achieves high second-harmonic generation (SHG) enhancement (76-fold), large SHG tunability by bias (8%/V), wide tuning range (280%), 7.8 × 10-9 conversion efficiency, and high stability but also exhibits a SHG tuning, that is bipolar rather than unipolar, not due to the third-order nonlinear polarization term, hence fundamentally different from the classic electric field induced SHG-tuning (EFISH). We propose a new SHG tuning mechanism: the second-order nonlinear polarization term enhanced by plasmonic effects, changed by charge injection and negative oxygen vacancies movement, and is nearly 3 orders of magnitude larger than EFISH. p-CASH is a bipolar parallel-plate capacitor with thin layers of plasmonic nanostructures, a TiOx (semiconductor and nonlinear) and a SiO 2 (insulator) sandwiched between two electrodes. Fabrication of p-CASH used nanoimprint on 4″ wafer and is scalable to wallpaper-sized areas. The new structure, new properties, and new understanding should open up various new designs and applications of NLG in various fields.

Original languageEnglish (US)
Pages (from-to)2822-2830
Number of pages9
JournalNano Letters
Volume14
Issue number5
DOIs
StatePublished - May 14 2014

Fingerprint

Electric charge
electric charge
Harmonic generation
harmonic generators
harmonic generations
Tuning
tuning
augmentation
Electric fields
Polarization
Charge injection
electric fields
Oxygen vacancies
polarization
parallel plates
Conversion efficiency
Nanostructures
capacitors
Capacitors
insulators

All Science Journal Classification (ASJC) codes

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

Cite this

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title = "Enhancement and electric charge-assisted tuning of nonlinear light generation in bipolar plasmonics",
abstract = "We propose and experimentally demonstrate a new plasmonic nonlinear light generation (NLG) structure, termed plasmonic-enhanced, charge-assisted second-harmonic generator (p-CASH), that not only achieves high second-harmonic generation (SHG) enhancement (76-fold), large SHG tunability by bias (8{\%}/V), wide tuning range (280{\%}), 7.8 × 10-9 conversion efficiency, and high stability but also exhibits a SHG tuning, that is bipolar rather than unipolar, not due to the third-order nonlinear polarization term, hence fundamentally different from the classic electric field induced SHG-tuning (EFISH). We propose a new SHG tuning mechanism: the second-order nonlinear polarization term enhanced by plasmonic effects, changed by charge injection and negative oxygen vacancies movement, and is nearly 3 orders of magnitude larger than EFISH. p-CASH is a bipolar parallel-plate capacitor with thin layers of plasmonic nanostructures, a TiOx (semiconductor and nonlinear) and a SiO 2 (insulator) sandwiched between two electrodes. Fabrication of p-CASH used nanoimprint on 4″ wafer and is scalable to wallpaper-sized areas. The new structure, new properties, and new understanding should open up various new designs and applications of NLG in various fields.",
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Enhancement and electric charge-assisted tuning of nonlinear light generation in bipolar plasmonics. / Ding, Wei; Zhou, Liangcheng; Chou, Stephen Y.

In: Nano Letters, Vol. 14, No. 5, 14.05.2014, p. 2822-2830.

Research output: Contribution to journalArticle

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