光子学报
2023, 52(10): 1052410
1 东南大学 仪器科学与工程学院 微惯性仪表与先进导航教育部重点实验室, 江苏 南京 210096
2 东南大学 苏州校区 苏州市金属纳米光电技术重点实验室,江苏 苏州 215123
3 东南大学 电子科学与工程学院 信息显示与可视化国际合作联合实验室,江苏 南京 210096
光子集成芯片将多种功能器件进行片上集成,具有损耗低、带宽大、抗电磁干扰等优势,是当前光电领域发展的主流方向。集成光学器件的温度稳定性是影响其光学性能的重要因素之一。为了提高集成光学器件温度稳定性,提出了基于氮化硅(Si3N4)和长程表面等离激元(Long-Range Surface Plasmon Polariton,LRSPP)波导的温度不敏感结构,对器件性能随温度的漂移进行抑制和补偿。首先,分析了Si3N4波导和LRSPP波导对接的模式耦合效率,当满足最佳匹配条件时,可实现耦合效率99.9%以上的高效耦合。对混合波导的温度特性进行了分析,结果表明,当LRSPP波导和Si3N4波导的最佳长度比为 0.077,相位不随温度的变化而发生漂移,实现了温度不敏感的波导。当波导不能满足最佳长度比时,对LRSPP波导芯层施加电压实现主动补偿,亦可实现温度不敏感。此外,对LRSPP波导的传输特性进行了测试,测得偏振消光比为64 dB,具有良好的单偏振特性。文中提出的温度不敏感结构具有可主动调谐、损耗低、单偏振、普适性高等优点,能有效地解决Si3N4波导性能随温度变化发生漂移的问题,在Si3N4基光子集成芯片中具有广泛的应用前景。
光子集成芯片 温度不敏感 相位调谐 氮化硅 表面等离激元 photonic integrated circuits temperature insensitive phase tuning silicon nitride surface plasmon polariton 红外与激光工程
2023, 52(9): 20220881
太原理工大学 物理与光电工程学院, 山西 太原 030024
纳米激光器在光通信、全息技术、生物医疗成像等领域有着广泛的应用前景。表面等离激元(Surface plasmon polariton, SPP)沿着金属表面传播,基于该特性可制成突破衍射极限的低阈值纳米激光器。它们不但具有小尺寸特征,同时还能激发Purcell效应,表现出更高的自发辐射效率。近年来,金属‐绝缘体‐半导体(MIS)波导结构的SPP激光器因具有超强的模式约束能力被大量报道。本文以基于MIS结构的SPP激光器为主题进行综述。首先,介绍了SPP激光器的工作原理,接着分别介绍了基于MIS波导结构的纳米片型和纳米线型SPP激光器的工作原理。然后,依据增益介质材料的不同,依次介绍了增益介质分别为Ⅱ‐Ⅵ半导体、Ⅲ‐Ⅴ半导体以及钙钛矿的SPP MIS波导激光器研究进展。最后,总结全文,并对基于MIS波导的SPP激光器未来的发展和挑战进行了展望。
表面等离激元 金属-绝缘体-半导体 激光器 纳米片 纳米线 surface plasmon polariton metal-insulator-semiconductor laser nanoplatelet nanowire
Author Affiliations
Abstract
On-chip manipulation of the spatiotemporal characteristics of optical signals is important in the transmission and processing of information. However, the simultaneous modulation of on-chip optical pulses, both spatially at the nano-scale and temporally over ultra-fast intervals, is challenging. Here, we propose a spatiotemporal Fourier transform method for on-chip control of the propagation of femtosecond optical pulses and verify this method employing surface plasmon polariton (SPP) pulses on metal surface. An analytical model is built for the method and proved by numerical simulations. By varying space- and frequency-dependent parameters, we demonstrate that the traditional SPP focal spot may be bent into a ring shape, and that the direction of propagation of a curved SPP-Airy beam may be reversed at certain moments to create an S-shaped path. Compared with conventional spatial modulation of SPPs, this method offers potentially a variety of extraordinary effects in SPP modulation especially associated with the temporal domain, thereby providing a new platform for on-chip spatiotemporal manipulation of optical pulses with applications including ultrafast on-chip photonic information processing, ultrafast pulse/beam shaping, and optical computing.On-chip manipulation of the spatiotemporal characteristics of optical signals is important in the transmission and processing of information. However, the simultaneous modulation of on-chip optical pulses, both spatially at the nano-scale and temporally over ultra-fast intervals, is challenging. Here, we propose a spatiotemporal Fourier transform method for on-chip control of the propagation of femtosecond optical pulses and verify this method employing surface plasmon polariton (SPP) pulses on metal surface. An analytical model is built for the method and proved by numerical simulations. By varying space- and frequency-dependent parameters, we demonstrate that the traditional SPP focal spot may be bent into a ring shape, and that the direction of propagation of a curved SPP-Airy beam may be reversed at certain moments to create an S-shaped path. Compared with conventional spatial modulation of SPPs, this method offers potentially a variety of extraordinary effects in SPP modulation especially associated with the temporal domain, thereby providing a new platform for on-chip spatiotemporal manipulation of optical pulses with applications including ultrafast on-chip photonic information processing, ultrafast pulse/beam shaping, and optical computing.
femtosecond surface plasmon polariton spatiotemporal modulation Fourier transform dispersion modulation Opto-Electronic Advances
2022, 5(11): 210047
Author Affiliations
Abstract
1 State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
2 Institute of Electromagnetic Space, Southeast University, Nanjing 210096, China
Although tremendous efforts have been devoted to investigating planar single-conductor circuits, it remains challenging to provide tight confinement of electromagnetic field and compatibility with active semi-conductor components such as amplifier, harmonic generator and mixers. Single-conductor spoof surface plasmon polariton (SSPP) structure, which is one of the most promising planar single-conductor transmission media due to the outstanding field confinement, still suffers from the difficulty in integrating with the active semi-conductor components. In this paper, a new kind of odd-mode-metachannel (OMM) that can support odd-mode SSPPs is proposed to perform as the fundamental transmission channel of the single-conductor systems. By introducing zigzag decoration, the OMM can strengthen the field confinement and broaden the bandwidth of odd-mode SSPPs simultaneously. More importantly, the active semi-conductor amplifier chip integration is achieved by utilizing the intrinsic potential difference on OMM, which breaks the major obstacle in implementing the single-conductor systems. As an instance, an amplifier is successfully integrated on the single-conductor OMM, which can realize both loss compensation and signal amplification. Meanwhile, the merits of OMM including crosstalk suppression, low radar cross section (RCS), and flexibility are comprehensively demonstrated. Hence, the proposed OMM and its capability to integrate with the active semi-conductor components may provide a new avenue to future single-conductor conformal systems and smart skins.Although tremendous efforts have been devoted to investigating planar single-conductor circuits, it remains challenging to provide tight confinement of electromagnetic field and compatibility with active semi-conductor components such as amplifier, harmonic generator and mixers. Single-conductor spoof surface plasmon polariton (SSPP) structure, which is one of the most promising planar single-conductor transmission media due to the outstanding field confinement, still suffers from the difficulty in integrating with the active semi-conductor components. In this paper, a new kind of odd-mode-metachannel (OMM) that can support odd-mode SSPPs is proposed to perform as the fundamental transmission channel of the single-conductor systems. By introducing zigzag decoration, the OMM can strengthen the field confinement and broaden the bandwidth of odd-mode SSPPs simultaneously. More importantly, the active semi-conductor amplifier chip integration is achieved by utilizing the intrinsic potential difference on OMM, which breaks the major obstacle in implementing the single-conductor systems. As an instance, an amplifier is successfully integrated on the single-conductor OMM, which can realize both loss compensation and signal amplification. Meanwhile, the merits of OMM including crosstalk suppression, low radar cross section (RCS), and flexibility are comprehensively demonstrated. Hence, the proposed OMM and its capability to integrate with the active semi-conductor components may provide a new avenue to future single-conductor conformal systems and smart skins.
odd-mode spoof surface plasmon polariton single-conductor system amplifier crosstalk suppression low RCS flexibility Opto-Electronic Advances
2022, 5(8): 210119
1 南京信息工程大学物理与光电工程学院, 江苏 南京 210044
2 山东师范大学物理与电子科学学院, 山东 济南 250358
开发高性能的电光调制器对于构建片上光子回路非常重要。鉴于纳米线结构具备独特的电场横向束缚特点,设计一种基于纳米线的混合表面等离激元波导电光调制器,该调制器由偏置双硅纳米线、双石墨烯层以及置于双石墨烯层之间的银纳米线构成。利用二维时域有限差分算法计算分析结构参数对器件调制性能的影响。模拟结果表明,所设计的调制器在1550 nm的工作波长下可以实现较为出色的调制性能,其3 dB调制带宽高达250 GHz, 调制深度和功耗分别高于0.15 dB/μm和低于11.5 fJ/bit,该调制器可为新一代高性能集成电光调制器的开发提供设计思路。
光学器件 纳米线 混合表面等离激元 石墨烯 调制器 光学学报
2021, 41(19): 1923001
Author Affiliations
Abstract
1 State Key Lab of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
2 State Key Lab of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
3 College of Physics, Jilin University, Changchun 130012, China
We report a feasible method to realize tunable surface plasmon-polariton (SPP) resonance in organic light-emitting devices (OLEDs) by employing corrugated Ag-Al alloy electrodes. The excited SPP resonance induced by the periodic corrugations can be precisely tuned based on the composition ratios of the Ag-Al alloy electrodes. With an appropriate composition ratio of the corrugated alloy electrode, the photons trapped in SPP modes are recovered and extracted effectively. The 25% increasement in luminance and 21% enhancement in current efficiency have been achieved by using the corrugated Ag-Al alloy electrodes in OLEDs.
organic light-emitting devices alloy electrodes tunable surface plasmon-polariton resonance periodic corrugation light extraction Opto-Electronic Advances
2021, 4(8): 08200024