High-quality-factor photonic crystal ring resonator

et al. 2016

Sci Rep

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In this report, we propose and demonstrate an air-mode photonic crystal ring resonator (PhCRR) on silicon-on-insulator platform. Air mode is utilized to confine the optical field into photonic crystal (PhC) air holes, which is confirmed by the three-dimensional finite-difference time-domain simulation. PhCRR structure is employed to enhance the light-matter interaction through combining the whispering-gallery mode resonance of ring resonator with the slow-light effect in PhC waveguide. In the simulated and measured transmission spectra of air-mode PhCRR, nonuniform free spectral ranges are observed near the Brillouin zone edge of PhC, indicating the presence of the slow-light effect. A maximum group index of 27.3 and a highest quality factor of 14600 are experimentally obtained near the band edge. Benefiting from the strong optical confinement in the PhC holes and enhanced light-matter interaction in the resonator, the demonstrated air-mode PhCRR is expected to have potential applications in refractive index sensing, on-chip light emitting and nonlinear optics by integration with functional materials.

mentioning

confidence: 99%

Air-mode photonic crystal ring resonator on silicon-on-insulator

Gao

et al. 2016

Sci Rep

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“…The simulation method is similar as the method in Ref. [36]. A TE-like polarized light excited by a dipole source propagates through the perfect lattice or the nanobeam cavity structure and then is monitored on the other side.…”

Section: Resultsmentioning

confidence: 99%

Single-Mode Emission From Ge Quantum Dots in Photonic Crystal Nanobeam Cavity

Zeng

IEEE Photon. Technol. Lett.

et al. 2015

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A freestanding one-dimensional photonic crystal nanobeam cavity embedded with Ge self-assembled quantum dots is designed and fabricated on a silicon-on-insulator substrate. Only one photoluminescence peak is observed in the wavelength range of 1000 to 1600 nm at room temperature. The emission peak dominates the photoluminescence spectrum over an almost flat and weak background emission, which indicates single-mode emission is realized in the proposed light emitter.

IEEE Photon. Technol. Lett.

“…The simulation method is similar as that of Ref. [21]. A TE-like polarized light excited by a dipole source, which is placed inside the PhC racetrack ring structure, propagates through the structure and then is monitored on the other side, shown as the inset of Fig.…”

Section: Slow-light Dispersion Inmentioning

confidence: 99%

Slow-Light Dispersion in One-Dimensional Photonic Crystal Racetrack Ring Resonator

Qiu

Zeng

et al. 2015

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A one-dimensional photonic crystal racetrack ring resonator coupling with an optimized bus waveguide on a silicon-on-insulator wafer is proposed and demonstrated. The nonuniform free spectral range is realized in the resonator. A maximum group index of 37.6 and a slowdown factor of 11.0 are obtained. The nonuniform free spectral range and large group index are attributed to the slow-light effect near the band edge of the one-dimensional photonic crystal. Three-dimensional finite-difference time-domain method is performed to simulate the resonator. The simulation results show good agreement with the experimental results. The photonic crystal racetrack ring resonator demonstrated here will be beneficial for channel drop filters, wavelength-division multiplexing, lasers, and other applications.