Article
Optics
Yin Xu, Luping Liu, Xin Hu, Yue Dong, Bo Zhang, Yi Ni
Summary: This study proposes a scalable silicon-based mode-order conversion scheme that can efficiently convert the mode-order from fundamental TE mode to various higher-order TE modes in a short conversion length. The proposed scheme achieves high mode conversion efficiency, wide working bandwidths, and detailed fabrication tolerances.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Di Wu, Wei Yan, Yucong Yang, Xiaoyi Song, Zixuan Wei, Jun Qin, Longjiang Deng, Lei Bi
Summary: A low loss optical interconnection between optical fibers and photonic integrated circuits is crucial for achieving high performance in photonic systems. Various approaches including spot size converters, subwavelength waveguide grating structures, and different refractive index materials have been used in the past decade to enable efficient coupling between fiber and photonic chips. However, achieving low-loss coupling with high index contrast waveguides like SiN and SMF-28 fibers remains challenging. In this study, we present a multilayer edge-coupler using SiOxN materials with different indices to achieve efficient edge coupling between SMF-28 fiber and SiN single mode waveguides. Theoretical results show a coupling loss of 0.068 dB for the TM mode at a wavelength of 1550 nm, with a 1 dB alignment tolerance offset of 2.4 μm.
Article
Engineering, Electrical & Electronic
Md. Torikul Islam Badal, Guanghui Ren, James Scott, Ke Wang
Summary: This letter proposes a novel asymmetric adiabatic taper-based device as the mode multiplexer and converter for TE0 and TE1 modes, enabling multiple modes to be transmitted through the same silicon waveguide (WG) to increase the capacity. The device has low insertion loss, high extinction ratio, and compact size.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
Yin Xu, Luping Liu, Xin Hu, Yue Dong, Bo Zhang, Yi Ni
Summary: A silicon-based TE0-to-TM1 mode-order converter has been proposed, which significantly reduces the mode conversion length to 3.5 micrometers through optimized metal layer design and the introduction of metal plasmonic effect. The mode-order converter exhibits excellent performance at a wavelength of 1.55 micrometers.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Linghua Wang, Fengyang Han, Huaixi Chen, Jiwei Huang, Yazhen Zhang, Xinbin Zhang, Xinkai Feng, Rongshan Wei, Shaohao Wang, Minmin Zhu
Summary: This paper proposes a CMOS-compatible, broadband, and polarization-independent edge coupler for efficient chip coupling with standard single-mode fiber. By using a three-layer silicon nitride waveguide array with the same structures in the top oxide cladding of the chip, high coupling efficiency and simplified mode transformation structure can be achieved. The structure has the potential to reduce the packaging cost of silicon photonic chips and can be used for on-chip three-dimensional photonic integrations or fiber-to-chip, chip-to-chip optical interconnections.
Article
Engineering, Electrical & Electronic
Ryota Tanomura, Rui Tang, Go Soma, Shota Ishimura, Takuo Tanemura, Yoshiaki Nakano
Summary: This article introduces a 6-port dual-polarization (DP) optical unitary processor (OUP) with polarization-splitter-rotators, implemented on a compact silicon photonic chip based on the multi-plane light conversion (MPLC) concept. It demonstrates all-optical MIMO demultiplexing of a 300-Gbps 3-mode DP quadrature phase-shift-keying (QPSK) signal at 1540, 1550, and 1560-nm wavelengths with an energy consumption of approximately 1.5 pJ/bit. All-optical MIMO is transparent to signal format and the energy cost decreases with increasing baudrate, making it an attractive approach for reducing power consumption in future ultra-high-capacity MDM systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Komron J. Shayegan, Souvik Biswas, Bo Zhao, Shanhui Fan, Harry A. Atwater
Summary: Researchers have found that in magneto-optic InAs, the application of an in-plane magnetic field modifies the permittivity tensor, leading to an enhanced spectral directional emissivity and decreased absorptivity, ultimately violating Kirchhoff's law of thermal radiation.
Article
Engineering, Electrical & Electronic
Lu Sun, Rui Hu, Zihan Zhang, Yu He, Yikai Su
Summary: This study proposes and demonstrates broadband power coupling and mode-order conversion based on trapezoidal subwavelength grating structures. The slowly varying trapezoidal subwavelength gratings enhance coupling efficiency and achieve efficient power transfer and mode conversion.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Optics
Bin Zhang, Yaodong Sun, Yi Xu, Guiying Hu, Pingyang Zeng, Mingqi Gao, Di Xia, Yufei Huang, Zhaohui Li
Summary: By harnessing optical loss in a coupled high-Q resonators system, on-chip electromagnetically induced transparency (EIT) can be achieved, leading to fast and nonvolatile responses. This mechanism, demonstrated experimentally on chalcogenide coupled microring resonators in a monolithically integrated chip, provides a new perspective for tunable photonic devices.
Article
Optics
Pucheng Huang, Kaixuan Chen, Liu Liu
Summary: This article demonstrates a symmetric directional coupler with a large fabrication tolerance on thin-film lithium niobate. The principle is based on compensating for the opposite trend of width and gap fabrication errors through beat length compensation. The tolerance is greater than +/- 100 nm for an optimized structure. The experimental results validate the simulated ones. The principle can be applied to DC-based devices, such as 3-dB couplers and waveguide array couplers, with a high yield.
Article
Chemistry, Multidisciplinary
Jinyang Zhao, Zhutian Wang, Nan Ye, Fufei Pang, Yingxiong Song
Summary: A new design of spot size converter (SSC) integrating the graded index (GRIN) waveguide with the 2-D inversely-tapered waveguide has been proposed to couple light beam between cleaved single-mode fiber (SMF) and silicon wire waveguide on silicon-on-insulator (SOI) platform. The device shows low coupling loss of 0.27 dB with cleaved SMF, polarization-dependent loss (PDL) below 0.25 dB, and 1-dB alignment tolerance of around 2.0 to 2.0 μm for both vertical and horizontal directions. The starting tip width of the tapered waveguide is kept within the lithography limitation at current commercial silicon photonics fab. This integrated SSC design could effectively reduce coupling loss between cleaved SMF and Si waveguide.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Electrical & Electronic
Martino Bernard, Luca Gemma, Davide Brunelli, Giovanni Paternoster, Mher Ghulinyan
Summary: We report on the design, fabrication, and characterization of a Silicon Nitride (SiN)-based integrated photonic chip in which the dielectric waveguides are coupled to photodetectors integrated homogeneously into the Silicon substrate. The photonic-electronic coupling was realized by a 3D inverse tapering of SiN waveguides.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
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
Optics
Ning Liu, Jianfa Zhang, Zhihong Zhu, Wei Xu, Ken Liu
Summary: This paper discusses methods for achieving high-efficiency coupling in integrated nanophotonic chips, analyzes factors affecting coupling efficiency, and proposes a scheme to improve coupling efficiency. The theoretical feasibility of the scheme was validated through experimentation, laying the foundation for the integration of photonic devices and optical fibers.
Article
Engineering, Electrical & Electronic
Ryota Tanomura, Rui Tang, Takuo Tanemura, Yoshiaki Nakano
Summary: This study experimentally demonstrates that the OUP based on multi-plane light conversion exhibits excellent robustness against deviations in waveguide geometries and operation wavelength, showing similar performance under different conditions.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
Taylor Hinsdale, Bilal H. Malik, Cory Olsovsky, Javier A. Jo, Kristen C. Maitland
Article
Biochemistry & Molecular Biology
Bilal H. Malik, Joohyung Lee, Shuna Cheng, Rodrigo Cuenca, Joey M. Jabbour, Yi-Shing Lisa Cheng, John M. Wright, Beena Ahmed, Kristen C. Maitland, Javier A. Jo
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2016)
Article
Dentistry, Oral Surgery & Medicine
Bilal H. Malik, Joey M. Jabbour, Shuna Cheng, Rodrigo Cuenca, Yi-Shing Lisa Cheng, John M. Wright, Javier A. Jo, Kristen C. Maitland
ORAL SURGERY ORAL MEDICINE ORAL PATHOLOGY ORAL RADIOLOGY
(2016)
Article
Endocrinology & Metabolism
Casey W. Pirnstill, Bilal H. Malik, Vincent C. Gresham, Gerard L. Cote
DIABETES TECHNOLOGY & THERAPEUTICS
(2012)
Article
Biochemical Research Methods
Bilal H. Malik, Casey W. Pirnstill, Gerard L. Cote
JOURNAL OF BIOMEDICAL OPTICS
(2013)
Article
Biochemical Research Methods
Joey M. Jabbour, Shuna Cheng, Bilal H. Malik, Rodrigo Cuenca, Javier A. Jo, John Wright, Yi-Shing Lisa Cheng, Kristen C. Maitland
JOURNAL OF BIOMEDICAL OPTICS
(2013)
Article
Optics
Omar Gutierrez-Navarro, Daniel U. Campos-Delgado, Edgar R. Arce-Santana, Kristen C. Maitland, Shuna Cheng, Joey Jabbour, Bilal Malik, Rodrigo Cuenca, Javier A. Jo
Article
Optics
Shuna Cheng, J. Jesus Rico-Jimenez, Joey Jabbour, Bilal Malik, Kristen C. Maitland, John Wright, Yi-Shing Lisa Cheng, Javier A. Jo
Article
Optics
Casey W. Pirnstill, Bilal H. Malik, Erwin Thomas, Gerard L. Cote
Article
Multidisciplinary Sciences
Meagan A. Harris, Andrew N. Van, Bilal H. Malik, Joey M. Jabbour, Kristen C. Maitland
Article
Biochemical Research Methods
Shuna Cheng, Rodrigo M. Cuenca, Boang Liu, Bilal H. Malik, Joey M. Jabbour, Kristen C. Maitland, John Wright, Yi-Shing Lisa Cheng, Javier A. Jo
BIOMEDICAL OPTICS EXPRESS
(2014)
Article
Biochemical Research Methods
Joey M. Jabbour, Bilal H. Malik, Cory Olsovsky, Rodrigo Cuenca, Shuna Cheng, Javier A. Jo, Yi-Shing Lisa Cheng, John M. Wright, Kristen C. Maitland
BIOMEDICAL OPTICS EXPRESS
(2014)
Article
Biochemical Research Methods
Joey M. Jabbour, Julie L. Bentley, Bilal H. Malik, John Nemechek, John Warda, Rodrigo Cuenca, Shuna Cheng, Javier A. Jo, Kristen C. Maitland
BIOMEDICAL OPTICS EXPRESS
(2014)
Proceedings Paper
Engineering, Biomedical
Joey M. Jabbour, Shuna Cheng, Sebina Shrestha, Bilal Malik, Javier A. Jo, Brian Applegate, Kristen C. Maitland
MULTIMODAL BIOMEDICAL IMAGING VII
(2012)
