Enhancement and reproducibility of high quality factor, one-dimensional photonic crystal/photonic wire (1D PhC/PhW) microcavities

N. Nawi, Burhanuddin Yeop Majlis, M. A. Mahdi, R. M. De La Rue, M. Lonĉar, Md Zain Ahmad Rifqi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Background: The production of compact and multi-functional photonic devices has become a topic of major research activity in recent years. Devices have emerged that can be used for functional requirements in high speed optical data processing, filtering, nonlinear optical functions such as all-optical switching - and many other applications. The combination of photonic crystal (PhC) structures consisting of a single row of holes embedded in a narrow photonic wire (PhW) waveguide realised in high index-contrast materials is a possible contender for provision of a range of compact devices on a single chip. This trend has been motivated by the availability of a silicon technology that can support monolithic integration to form fully functional devices on CMOS chips. Results: We have successfully demonstrated experimentally an enhancement of the quality factor of a one-dimensional (1D) photonic crystal/photonic wire (PhC/PhW) microcavity that can exhibit resonance quality factor (Q-factor) values as high as 800,000 - together with a low modal volume of approximately 0.5 (λ/n)3. These results are based on the use of a mode matching approach previously used for device design - through the engineering of tapered hole sections within and outside the cavity - and were achieved without removing the silica cladding layer below the silicon waveguide core. The simulation results obtained in this case also agree with the experimental results obtained. Conclusions: In this work we have demonstrated that the mode matching, as light enters the photonic crystal structure, can be further enhanced through the use of careful fine tuning of the third hole, t3 of the tapered hole region outside the cavity. The Q-factor value obtained was approximately four times greater than that achieved in our previous work on a similar structure.

Original languageEnglish
Article number6
JournalJournal of the European Optical Society
Volume14
Issue number1
DOIs
Publication statusPublished - 1 Dec 2018

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Q factors
wire
photonics
augmentation
crystals
chips
optical data processing
waveguides
cavities
crystal structure
silicon
optical switching
availability
CMOS
tuning
high speed
engineering
silicon dioxide
trends
requirements

Keywords

  • Integrated optics
  • Nanophotonic
  • Photonic crystal

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Enhancement and reproducibility of high quality factor, one-dimensional photonic crystal/photonic wire (1D PhC/PhW) microcavities. / Nawi, N.; Yeop Majlis, Burhanuddin; Mahdi, M. A.; De La Rue, R. M.; Lonĉar, M.; Ahmad Rifqi, Md Zain.

In: Journal of the European Optical Society, Vol. 14, No. 1, 6, 01.12.2018.

Research output: Contribution to journalArticle

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