Genetically designed L3 photonic crystal nanocavities with measured quality factor exceeding one million

Lai, Y., Pirotta, S., Urbinati, G., Gerace, D., Minkov, M., Savona, V., Badolato, A. and Galli, M. (2014) Genetically designed L3 photonic crystal nanocavities with measured quality factor exceeding one million. Applied Physics Letters, 104(24), 241101. (doi: 10.1063/1.4882860)

Abstract

We report on the experimental realization of ultra-high quality factor (Q) designs of the L3-type photonic crystal nanocavity. Based on genetic optimization of the positions of few nearby holes, our design drastically improves the performance of the conventional L3 as experimentally confirmed by direct measurement of Q ≃ 2 × 106 in a silicon-based photonic crystal membrane. Our devices rank among the highest Q/V ratios ever reported in photonic crystal cavities, holding great promise for the realization of integrated photonic platforms based on ultra-high-Q resonators.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Badolato, Professor Antonio
• Authors: Lai, Y., Pirotta, S., Urbinati, G., Gerace, D., Minkov, M., Savona, V., Badolato, A., and Galli, M.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Applied Physics Letters
• Publisher: AIP Publishing
• ISSN: 0003-6951
• ISSN (Online): 1077-3118