Enhancing Purcell’s factor of plasmonic bowtie nano-antennas for quantum dot emitters of InGaN/GaN in green band

Document Type : Full length research Paper

Authors

1 Academic member

2 Golestan blvd.

Abstract

In this work, plasmonic bowtie nano-antennas (as two opposite nano-prisms) for enhancing the electric field and Purcell’s factor of InGaN/GaN quantum dot emitters have been designed. To this end, at first, gold, silver, copper, and aluminum bowties have been investigated. The primary results showed aluminum bowties are more suitable for low wavelength excitations near the green band. Then, the size, gap, and substrate of aluminum bowties have been examined. The results showed aluminum nano-antennas with the length of 63.6 nm, the thickness of 30 nm, top angle of 300, and gap of 20 nm, when are grown on GaN/glass as substrate, results in a Purcell;s factor of 81 with a resonance wavelength of 535 nm. Replacing the AlN/glass with GaN/glass substrate, results in a Purcell’s factor of 86.3 and resonance wavelength of 495 nm.

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References

 
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History

  • Receive Date: 30 May 2015
  • Revise Date: 01 October 2015
  • Accept Date: 26 January 2016

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