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A photonic crystal side-coupled waveguide based on a high-quality-factor resonator array 被引量:2
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作者 崔乃迪 梁静秋 +1 位作者 梁中翥 王维彪 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第3期275-282,共8页
Based on the present coupled mode theory of the photonic crystal resonator array in this paper, we propose a novel side-coupled waveguide to achieve highly efficient coupling of photonic crystal devices. It is found t... Based on the present coupled mode theory of the photonic crystal resonator array in this paper, we propose a novel side-coupled waveguide to achieve highly efficient coupling of photonic crystal devices. It is found that the coupling efficiency is sensitive to the interval, the total number and the quality factor of the resonator. Considering the coupling efficiency and the coupling region, we select five resonators with an interval of six lattice periods. By optimizing the structure parameters of the waveguide and resonator, the quality factors of the resonator can be modulated and the coupling efficiency of the side-coupled waveguide reaches 95.47% in theory. Compared with other coupling methods, the side-coupled waveguide can realize efficient coupling with a compact structure, a high level of integration and a low degree of operational difficulties. 展开更多
关键词 side-coupled waveguide photonic crystal high-quality-factor cavity
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Design of Two-Dimensional Photonic Crystal Edge Emitting Laser for Photonic Integrated Circuits
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作者 马小涛 郑婉华 +1 位作者 任刚 陈良惠 《Chinese Physics Letters》 SCIE CAS CSCD 2006年第10期2759-2762,共4页
An edge emitting laser based on two-dimensional photonic crystal slabs is proposed. The device consists of a square lattice microcavity, which is composed of two structures with the same period but different radius of... An edge emitting laser based on two-dimensional photonic crystal slabs is proposed. The device consists of a square lattice microcavity, which is composed of two structures with the same period but different radius of air-holes, and a waveguide. In the cavity, laser resonance in the inner structure benefits from not only the anomalous dispersion characteristic of the first band-edge at the M point in the first Brillouin-zone but also zero photon states in the outer structure. A line defect waveguide is introduced in the outer structure for extracting photons from the inner cavity. Three-dimensional finite-difference time-domain simulations apparently show the in-plane laser output from the waveguide. The microcavity has an effective mode volume of about 3.2(λ/nslab)^3 for oscillation mode and the quality factor of the device including line defect waveguide is estimated to be as high as 1300. 展开更多
关键词 high-quality-factor WAVE-GUIDE LASER DEFECT MODES SLAB LATTICE VOLUME
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Acoustic Purcell effect induced by quasibound state in the continuum
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作者 Sibo Huang Shuhuan Xie +5 位作者 He Gao Tong Hao Shuang Zhang Tuo Liu Yong Li Jie Zhu 《Fundamental Research》 CAS CSCD 2024年第1期57-62,共6页
We study theoretically and experimentally the acoustic Purcell effect induced by quasi-bound states in the continuum(quasiBICs).A theoretical framework describing the acoustic Purcell effect of a resonant system is de... We study theoretically and experimentally the acoustic Purcell effect induced by quasi-bound states in the continuum(quasiBICs).A theoretical framework describing the acoustic Purcell effect of a resonant system is developed based on the system’s radiative and dissipative factors,which reveals the critical emission condition for achieving optimum Purcell factors.We show that the quasiBICs contribute to highly confined acoustic field and bring about greatly enhanced acoustic emission,leading to strong Purcell effect.Our concept is demonstrated via two coupled resonators supporting a Friedrich-Wintgen quasiBIC,and the theoretical results are validated by the experiments observing emission enhancement of the sound source by nearly two orders of magnitude.Our work bridges the gap between the acoustic Purcell effect and acoustic BICs essential for enhanced wave-matter interaction and acoustic emission,which may contribute to the research of high-intensity sound sources,high-quality-factor acoustic devices and nonlinear acoustics. 展开更多
关键词 Acoustic Purcell effect Bound state in the continuum Mode coupling Sound emission enhancement high-quality-factor acoustic device
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High-Q micro-ring resonators and grating couplers for silicon-on-insulator integrated photonic circuits 被引量:1
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作者 仝晓刚 刘俊 薛晨阳 《Journal of Semiconductors》 EI CAS CSCD 2013年第8期106-109,共4页
An ultra-small integrated photonic circuit has been proposed,which incorporates a high-quality-factor passive micro-ring resonator(MR) linked to a vertical grating coupler on a standard silicon-on-insulator(SOI) s... An ultra-small integrated photonic circuit has been proposed,which incorporates a high-quality-factor passive micro-ring resonator(MR) linked to a vertical grating coupler on a standard silicon-on-insulator(SOI) substrate.The experimental results demonstrate that the MR propagation loss is 0.532 dB/cm with a 10μm radius ring resonator,the intrinsic quality factor is as high as 202.000,the waveguide grating wavelength response curve is a 1 dB bandwidth of 40 nm at 1540 nm telecommunication wavelengths,and the measured fiber-to-fiber coupling loss is 10 dB.Furthermore,the resonator wavelength temperature dependence of the 450 nm wide micro-ring resonator is 54.1 pm/℃.Such vertical grating coupler and low loss MR-integrated components greatly promote a key element in biosensors and high-speed interconnect communication applications. 展开更多
关键词 high-quality-factor passive micro-ring resonators waveguide grating couplers integrated photonic circuit
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