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Dual-rail nanobeam microfiber-coupled resonator.
Hee-Jin Lim1, Chang-Min Lee, Byeong-Hyeon Ahn
1Department of Physics, KAIST, Daejeon 305-701, South Korea.
Optics Express
|April 3, 2013
Summary
This study introduces a novel microfiber-coupled dual-rail nanobeam resonator for efficient light emission. The device demonstrates a high quality factor and spontaneous emission factor, paving the way for advanced photonic applications.
Area of Science:
- Photonics
- Nanotechnology
- Quantum Optics
Background:
- Microfiber-coupled resonators are crucial for integrated photonic circuits.
- Dual-rail nanobeam structures offer enhanced light-matter interaction.
- Efficient light out-coupling and wavelength tuning remain key challenges.
Purpose of the Study:
- To propose and demonstrate a microfiber-coupled dual-rail nanobeam resonator.
- To enhance light emitter and air mode overlap for improved performance.
- To create a simple, robust, and reconfigurable laser device.
Main Methods:
- Fabrication of a dual-rail nanobeam resonator.
- Coupling with a curved microfiber to form a resonant cavity.
- Utilizing InGaAsP quantum well gain medium for lasing.
- Experimental characterization of quality factor and out-coupling efficiency.
Main Results:
- Achieved experimental quality factor of 11,000 and out-coupling efficiency of 30%.
- Measured a spontaneous emission factor (β) of 0.16 for the nanobeam laser.
- Computational analysis predicted a quality factor > 6 × 10^5 and out-coupling efficiency > 90%.
Conclusions:
- The proposed dual-rail nanobeam resonator enables efficient light emission and out-coupling.
- The device is suitable for creating simple, robust, and reconfigurable lasers.
- The design shows potential for high-performance photonic integrated circuits.
