Gallium nitride L3 photonic crystal cavities with an average quality factor of 16 900 in the near infrared

Journal Article · Mon Dec 08 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4903861· OSTI ID:22395449

Vico Triviño, Noelia; Carlin, Jean-François; Butté, Raphaël; Grandjean, Nicolas ^[1]; Minkov, Momchil; Savona, Vincenzo ^[2]; Urbinati, Giulia; Galli, Matteo ^[3]

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1. Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne (Switzerland)
2. Laboratory of Theoretical Physics of Nanosystems, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne (Switzerland)
3. Dipartimento di Fisica, Università di Pavia, via Bassi 6, 27100 Pavia (Italy)

Photonic crystal point-defect cavities were fabricated in a GaN free-standing photonic crystal slab. The cavities are based on the popular L3 design, which was optimized using an automated process based on a genetic algorithm, in order to maximize the quality factor. Optical characterization of several individual cavity replicas resulted in an average unloaded quality factor Q = 16 900 at the resonant wavelength λ∼1.3 μm, with a maximal measured Q value of 22 500. The statistics of both the quality factor and the resonant wavelength are well explained by first-principles simulations including fabrication disorder and background optical absorption.

• OSTI ID: 22395449
• Journal Information: Applied Physics Letters, Vol. 105, Issue 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ALGORITHMS
COMPUTERIZED SIMULATION
CRYSTALS
FABRICATION
GALLIUM NITRIDES
NEAR INFRARED RADIATION
POINT DEFECTS
QUALITY FACTOR
Q-VALUE
SLABS
WAVELENGTHS