Article
Optics
Xiangzhi Xie, Jilong Li, Kun Xu, Jose Capmany, Yitang Dai
Summary: This paper proposes a method of compressing LFM signals based on the spectral Talbot effect and demonstrates it through experiments. The method can effectively compress broadband LFM signals with long durations and measure the delay difference between signals.
Article
Chemistry, Multidisciplinary
Haipeng Liu, Jijun Feng, Jinman Ge, Shanqing Zhuang, Shuo Yuan, Yishu Chen, Xiaojun Li, Qinggui Tan, Qinghua Yu, Heping Zeng
Summary: The ultra-compact broadband silicon polarizing beam splitter proposed in this study demonstrates small size, high extinction ratio, and wide operating bandwidth.
Article
Optics
Shuyuan Liu, Yuya Shoji, Tetsuya Mizumoto
Summary: This study demonstrates a transverse electric mode magneto-optical isolator based on an asymmetric microring resonator without additional polarization rotators in series. Cerium-substituted yttrium iron garnet is integrated with silicon-on-insulator substrates by wafer bonding to break the Lorentz reciprocity on-chip after applying a unidirectional magnetic field.
Article
Optics
Peiji Zhou, Ting Li, Yucheng Lin, Lipeng Xia, Li Shen, Xiaochuan Xu, Tao Li, Yi Zou
Summary: By leveraging the artificial gauge field mechanism, a dense waveguide array with a half-wavelength pitch, low-crosstalk, and broadband capability has been demonstrated in silicon. This approach enables flexible routing and significant reduction in on-chip estate, leading to a high-density photonic integrated circuit.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Analytical
Donghao Li, Bin Li, Bo Tang, Peng Zhang, Yan Yang, Ruonan Liu, Ling Xie, Zhihua Li
Summary: This study proposes and demonstrates a silicon nitride bent directional coupler with large bandwidth, large fabrication tolerance, and low thermal sensitivity. The fabrication process of 400 nm thick silicon nitride photonic devices is described, showing its compatibility with complementary metal-oxide-semiconductor technology and its practicality.
Article
Optics
Mengjie Yu, Rebecca Cheng, Christian Reimer, Lingyan He, Kevin Luke, Eric Puma, Linbo Shao, Amirhassan Shams-Ansari, Xinyi Ren, Hannah R. Grant, Leif Johansson, Mian Zhang, Marko Loncar
Summary: Optical isolators are essential for protecting lasers from unwanted reflections and maintaining phase-stable coherent operation in optical systems. Integrated chip-scale optical systems require fully integrated optical isolators, but existing approaches face challenges in material integration. In this study, a non-reciprocal electro-optic isolator on thin-film lithium niobate is achieved, with high performance in terms of isolation and insertion loss. This represents an important advancement towards practical on-chip optical isolators.
Article
Optics
Xiaoyuan Guo, Zi Wang, Yao Zhang, Yingjie Liu, Zimeng Zhang, Jiefeng Xu, Shumin Xiao, Qinghai Song, Ke Xu
Summary: An ultra-broadband multimode waveguide crossing based on subwavelength transmitarray (SWTA) is proposed, which exhibits high transmittance in the propagation direction and excellent confinement in its orthogonal direction. The crossing, designed and fabricated on silicon on insulator, has a compact footprint of only 5.05 μm x 5.05 μm and operates over a large bandwidth from 1.4 to 2.1 μm with an excess loss of less than 0.77 dB. This ultra-broadband and compact multimode crossing enables dense cross connection of waveguides with large data capacity via wavelength and mode division multiplexing.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Ye Tian, Zhe Kang, Tingge Dai, Peipeng Xu, Yan Li, Yegang Lv, Xiaowei Zhang
Summary: This paper presents a broadband polarization rotator based on 70 nm-etched slab waveguides, which is compatible with all standard silicon photonic platforms. It achieves high efficiency and covers an ultra-wide bandwidth.
Article
Optics
Marios Papadovasilakis, Sujith Chandran, Yonas Gebregiorgis, Ayat M. Taha, Kanhaya Sharma, Yusheng Bian, Michal Rakowski, Rod Augur, Jaime Viegas
Summary: We demonstrate wavelength-independent couplers (WICs) based on an asymmetric Mach-Zehnder interferometer (MZI) on a monolithic silicon-photonics platform. Performance comparison between circular and 3rd order Bezier bends-based MZIs is carried out. Experimental results show uniform performance across different wafer sites for various target splitting ratios. The Bezier bend-based structure exhibits superior performance in terms of insertion loss (0.14 dB) and consistency throughout different wafer dies with a maximum deviation of 0.6% over a wavelength span of 100 nm. The devices have a compact footprint of 36.3 x 3.8 μm2.
Article
Engineering, Electrical & Electronic
Zuoqin Ding, Jialve Sun, Changhui Li, Yaocheng Shi
Summary: This paper presents a method to build micro-ring resonators as ultrasound sensors on the Silicon-On-Insulator platform. By utilizing the transverse magnetic mode and introducing the elastomer as cladding, the sensitivity and bandwidth of the sensors are improved. The fabricated micro-ring resonator shows high Q value and steep slope, achieving high sensing bandwidth and sensitivity.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Review
Physics, Applied
Fuhao Yu, Zhaobang Zeng, Xiang Ji, Kaifei Tang, Yu Xin, Guihan Wu, Dun Mao, Tingyi Gu, Qingzhong Huang, Wei Jiang
Summary: This paper reviews the progress of electro-optic modulators composed of silicon-based microscopic photonic structures. The basic principles, device structures, and advanced modulation capability of different geometric types are detailed for micro-ring modulators, photonic crystal modulators, and other related modulators. The article discusses the impacts of these modulators on speed, power consumption, and thermal stabilities, as well as the challenges, further directions, and emerging possibilities for microscopic photonic structure-based silicon modulators.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Kazim Gorgulu, Emir Salih Magden
Summary: This study presents the design, simulation, and experimental demonstration of compact and ultra-broadband silicon photonic filters with adiabatic waveguides. The filters can separate a broadband signal into short-pass and long-pass outputs using an optimization algorithm for coupled adiabatic waveguide structures. The experimentally demonstrated band-pass filters have passbands ranging from 6.4 nm up to 96.6 nm, with low insertion loss and high extinction ratios.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Weiwei Chen, Jian Lin, Hongxiang LI, Pengjun Wang, Shixun Dai, Yuxiao Liu, Runkui Yao, Jun LI, Qiang Fu, Tingge Dai, Jianyi Yang
Summary: This paper proposes a design of a 1 x 2 multimode 3 dB optical power splitter using tapered couplers. The optimized device is fabricated on a silicon-on-insulator platform and exhibits good power uniformity and low crosstalk.
Article
Nanoscience & Nanotechnology
Rui Chen, Zhuoran Fang, Johannes E. Froch, Peipeng Xu, Jiajiu Zheng, Arka Majumdar
Summary: Programmable photonic integrated circuits (PICs) have recently gained significant interest due to their potential in next-generation technologies. The fundamental building block is a 2 x 2 programmable unit, traditionally controlled by thermal or free-carrier dispersion. However, these implementations are power-hungry and volatile, making a set-and-forget-type unit with zero static power consumption highly desirable. This report presents a nonvolatile electrically controlled 2 x 2 programmable unit in silicon photonics, which exhibits compact size, low insertion loss, and minimal crosstalk.
Article
Engineering, Electrical & Electronic
Vijay, Shivani Sharma, Vivek Venkataraman, Joyee Ghosh
Summary: We propose simple rectangular cross-section, few-cm long SiN waveguide designs capable of generating ultra-broadband frequency-correlated photon pairs via SFWM, exceeding an octave in bandwidth spanning the visible-to-telecom wavelengths (similar to 700-1700 nm for similar to 1-mu m pump) with a spectral brightness of > 2.5 x 10(4) photon pairs/s/nm/mW(2). Such compact sources could potentially be employed in large-scale multi-channel hybrid (free space + fiber) quantum networking schemes and heralding telecom single photons by utilizing high efficiency visible detectors.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
