激光与光电子学进展, 2013, 50 (6): 062301, 网络出版: 2013-05-15
基于自准直效应和法布里珀罗腔的太赫兹波调制器
Terahertz-Wave Modulator Based on Self-Collimation Effect and Fabry-Pérot Cavity
光学器件 调制器 时域有限差分法 太赫兹 自准直 光子晶体 optical devices modulator finite-difference time-domain method terahertz self-collimation photonic crystal
摘要
光子晶体技术和太赫兹波技术相结合为设计太赫兹波调制器提供了新的思路。提出并设计了一种基于自准直效应和法布里珀罗(F-P)腔的太赫兹波调制器,该调制器通过在特殊结构设计的硅基空气孔型光子晶体中填充5CB液晶制成。应用时域有限差分法(FDTD),研究了太赫兹波在该调制器中的传输特性,包括时域响应、频域响应和稳态能量场分布等。该调制器调制速率约为10 kHz,插入损耗约为0.308 dB,调谐范围为0.308~34.32 dB,体积小易于集成,可根据工作波长需要设计调制器的尺寸。该调制器最大优点在于其工作波长范围宽,是很理想的太赫兹波调制器件。
Abstract
The combination of photonic crystal technology and terahertz technology has provided a new idea to design the terahertz-wave modulator. A terahertz-wave modulator based on self-collimation effect and Fabry-Pérot (F-P) cavity is presented. It is made by filling 5CB liquid crystal into the air holes of the photonic crystal which is designed with special structures. The transmission characteristics of the THz wave, including time-domain response, frequency-domain response and energy distributions of the steady state, are studied with the finite-difference time-domain method (FDTD). The modulator, with a modulation rate of about 10 kHz, an insertion loss of about 0.308 dB, and a tuning range of 0.308~34.32 dB, has a small size. It can be designed according to the demand of the working wavelength and can be easily integrated. Wide operating wavelength range is the greatest advantage of this modulator. It is an ideal terahertz-wave modulator.
蒋强, 梁斌明, 胡艾青, 陈家璧, 庄松林. 基于自准直效应和法布里珀罗腔的太赫兹波调制器[J]. 激光与光电子学进展, 2013, 50(6): 062301. Jiang Qiang, Liang Binming, Hu Aiqing, Chen Jiabi, Zhuang Songlin. Terahertz-Wave Modulator Based on Self-Collimation Effect and Fabry-Pérot Cavity[J]. Laser & Optoelectronics Progress, 2013, 50(6): 062301.