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| 1 | Mid-infrared silicon photonic waveguides and devices [Invited]显示文摘Silicon has been the material of choice of the photonics industry over the last decade due to its easy integration with silicon electronics, high index contrast, small footprint, and low cost, as well as its optical transparency in the nearinfrared and parts of mid-infrared(MIR) wavelengths(from 1.1 to 8 μm). While considerations of micro-and nano-fabrication-induced device parameter deviations and a higher-than-desirable propagation loss still serve as a bottleneck in many on-chip data communication applications, applications as sensors do not require similar stringent controls. Photonic devices on chips are increasingly being demonstrated for chemical and biological sensing with performance metrics rivaling benchtop instruments and thus promising the potential of portable, handheld,and wearable monitoring of various chemical and biological analytes. In this paper, we review recent advances in MIR silicon photonics research. We discuss the pros and cons of various platforms, the fabrication procedures for building such platforms, and the benchmarks demonstrated so far, together with their applications. Novel device architectures and improved fabrication techniques have paved a viable way for realizing low-cost, high-density,multi-function integrated devices in the MIR. These advances are expected to benefit several application domains in the years to come, including communication networks, sensing, and nonlinear systems. | YI ZOU SWAPNAJIT CHAKRAVARTY CHI-JUI CHUNG XIAOCHUAN XU RAY T.CHEN | 2018 | Photonics Research2018，6，4： | 9 |
| 2 | Effective in-device r33 of 735 pm-V on electro-optic polymer infiltrated silicon photonic crystal slot waveguides 显示文摘 | WANG Xiao-long LIN Che-yun Chakravarty Swapnajit | 2011 | Optics Letters (S1539-4794)2011，36，6： | 1 |
| 3 | Review of design principles of 2D photonic crystal microcavity biosensors in silicon and their applications显示文摘在这份报纸,我们考察了设计原则二维(2D ) 硅 photonic 水晶 microcavity (脉冲编码调制) 生物传感器联合了到 photonic 水晶波导(PCW ) 。Microcavity 放射损失被控制由设计了洞模式体积。联合损失进波导被从波导调整 microcavity 的位置控制。我们也调查了 analyte 重叠积分的依赖(也打电话充满部分) 反响的模式以及在 microcavity 的反响的波长的联合波导的组索引的效果。除了洞性质,和涉及生物化学的反应的探查和目标 biomarkers 的亲密关系常数的察觉到的媒介或 analyte 的吸收度也限制最小的察觉限制。我们在癌症 biomarker 察觉,重金属察觉到并且治疗学的药监视在应用总结了我们的结果。 | Swapnajit CHAKRAVARTY Xiangning CHEN Naimei TANG Wei-Cheng LAI Yi ZOU Hai WAN Ray T. CHEN | 2016 | Frontiers of Optoelectronics2016，9，2： | 0 |
| 4 | Silicon nonlinear switch as a conditional circulator for monostatic LiDAR systems显示文摘All-optical silicon-photonics-based LiDAR systems allow for desirable features in scanning resolution and speed,as well as leverage other advantages such as size, weight, and cost. Implementing optical circulators in silicon photonics enables bidirectional use of the light path for both transmitters and receivers, which simplifies the system configuration and thereby promises low system cost. In this work, to the best of our knowledge, we present the first experimental verification of all-passive silicon photonics conditional circulators for monostatic LiDAR systems using a nonlinear switch. The proposed silicon nonlinear interferometer is realized by controlling signal power distribution with power-splitting circuits, allowing the LiDAR transmitter and receiver to share the same optical path. Unlike the traditional concept requiring a permanent magnet, the present device is implemented by using common silicon photonic waveguides and a standard foundry-compatible fabrication process. With several additional phase shifters, the demonstrated device exhibits considerable flexibility using a single chip, which can be more attractive for integration with photodetector arrays in LiDAR systems. | Mingfei Ding Yiwei Xie Hao Yan Abu Naim R.Ahmed Reza Safian Swapnajit Chakravarty Leimeng Zhuang Pengcheng Jiao Huan Li Liu Liu Daoxin Dai | 2022 | Photonics Research2022，10，2： | 0 |
| 5 | Hybrid material integration in silicon photonic integrated circuits显示文摘Hybrid integration ofⅢ-Ⅴand ferroelectric materials is being broadly adopted to enhance functionalities in silicon photonic integrated circuits(PICs).Bonding and transfer printing have been the popular approaches for integration of III–V gain media with silicon PICs.Similar approaches are also being considered for ferroelectrics to enable larger RF modulation bandwidths,higher linearity,lower optical loss integrated optical modulators on chip.In this paper,we review existing integration strategies ofⅢ-Ⅴmaterials and present a route towards hybrid integration of bothⅢ-Ⅴand ferroelectrics on the same chip.We show that adiabatic transformation of the optical mode between hybrid ferroelectric and silicon sections enables efficient transfer of optical modal energies for maximum overlap of the optical mode with the ferroelectric media,similar to approaches adopted to maximize optical overlap with the gain section,thereby reducing lasing thresholds for hybridⅢ-Ⅴintegration with silicon PICs.Preliminary designs are presented to enable a foundry compatible hybrid integration route of diverse functionalities on silicon PICs. | Swapnajit Chakravarty† Min Teng Reza Safian Leimeng Zhuang | 2021 | Journal of Semiconductors2021，42，4： | 0 |
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