High-spectral-contrast symmetric modes in photonic crystal dual nanobeam resonators

Journal Article · Mon Jun 20 00:00:00 EDT 2016 · IEEE Photonics Technology Letters

DOI:https://doi.org/10.1109/LPT.2016.2582641· OSTI ID:1337657

Abbaslou, Siamak ^[1]; Gatdula, Robert ^[1]; Lu, Ming ^[2]; Stein, Aaron ^[2]; Soref, Richard A. ^[3]; Jiang, Wei ^[1]

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1. Rutgers Univ., Piscataway, NJ (United States)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)
3. Univ. of Massachusetts, Boston, MA (United States)

Here, we demonstrate accurate control of mode symmetry in suspended dual-nanobeam resonators on a silicon-on-insulator chip. Each nanobeam consists of a Fabry-Perot nanocavity bounded by tapered 1-D photonic crystals. Even and odd cavity-modes are formed due to lateral evanescent coupling between the two nanobeams. The odd cavity-mode can be excited by mode-symmetry-transforming Mach-Zehnder couplers. Modal contrasts over 27 dB are measured in fabricated structures. The influence of the optical field in the middle air slot on the background transmission and quality factors is discussed. The observed peak wavelength separations of the modes at various nanobeam spacings are in good agreement with simulation results. These nanobeam resonators are potentially useful in applications, such as ultrafast all-optical modulation, filtering, and switching.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• OSTI ID: 1337657
• Report Number(s): BNL--113327-2016-JA; KC0403020
• Journal Information: IEEE Photonics Technology Letters, Journal Name: IEEE Photonics Technology Letters Journal Issue: 20 Vol. 28; ISSN 1041-1135
• Publisher: IEEE
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
Center for Functional Nanomaterials
Q-factor
all-optical devices
cavity resonators
coupled resonators
filtering
guided waves
integrated optics devices
optical filters
optical resonators
optical switches
optical switching devices
photonic crystals
photonics
silicon photonics
wavelength filtering devices