太赫兹波具有载频高、带宽大、频谱信息丰富等特点,其在高速通信、分子检测和生物医学成像等领域的潜力已得到广泛关注。太赫兹调制器是太赫兹检测系统中的关键器件,但是当前已报道的调制器都不能同时具备高效、高速、低插入损耗等特点...太赫兹波具有载频高、带宽大、频谱信息丰富等特点,其在高速通信、分子检测和生物医学成像等领域的潜力已得到广泛关注。太赫兹调制器是太赫兹检测系统中的关键器件,但是当前已报道的调制器都不能同时具备高效、高速、低插入损耗等特点。因此,提出并设计了一种基于GaAs肖特基二极管结合表面等离子体栅阵结构的电控太赫兹调制器。该器件将谐振腔和金属栅阵的电场增强效应相互叠加,大幅提升了器件的调制性能,实现了0.4~1.4 THz范围内多频点调制,最高调制深度约为80%,插入损耗低于10 d B,调制速度大于100kHz。展开更多
A phenomenon about optical bistability is successfully investigated in a layered structure consisting of a silver film with Kerr medium and a silver grating sandwiched between semi-infinite linear dielectrics.This typ...A phenomenon about optical bistability is successfully investigated in a layered structure consisting of a silver film with Kerr medium and a silver grating sandwiched between semi-infinite linear dielectrics.This type of structure can lead to the optical bistability phenomena occurring in reflection and transmission.There exists an optimal thickness of the metal grating that can cut off the effect of the near-field enhancement and may have the lowest effect on conversion from surface plasmon to light.This structure can realize the functions of the beam splitter and the polarization splitter and will be essential for future classical and quantum information processing.展开更多
文摘太赫兹波具有载频高、带宽大、频谱信息丰富等特点,其在高速通信、分子检测和生物医学成像等领域的潜力已得到广泛关注。太赫兹调制器是太赫兹检测系统中的关键器件,但是当前已报道的调制器都不能同时具备高效、高速、低插入损耗等特点。因此,提出并设计了一种基于GaAs肖特基二极管结合表面等离子体栅阵结构的电控太赫兹调制器。该器件将谐振腔和金属栅阵的电场增强效应相互叠加,大幅提升了器件的调制性能,实现了0.4~1.4 THz范围内多频点调制,最高调制深度约为80%,插入损耗低于10 d B,调制速度大于100kHz。
基金supported by National Basic Research Program of China(Grant No.2010CB923202)
文摘A phenomenon about optical bistability is successfully investigated in a layered structure consisting of a silver film with Kerr medium and a silver grating sandwiched between semi-infinite linear dielectrics.This type of structure can lead to the optical bistability phenomena occurring in reflection and transmission.There exists an optimal thickness of the metal grating that can cut off the effect of the near-field enhancement and may have the lowest effect on conversion from surface plasmon to light.This structure can realize the functions of the beam splitter and the polarization splitter and will be essential for future classical and quantum information processing.
