Article
Optics
Mingyang Ma, Mingrui Yuan, Xudong Zhou, Huifu Xiao, Pengfei Cao, Lin Cheng, Thach Giang Nguyen, Andreas Boes, Guanghui Ren, Yikai Su, Arnan Mitchell, Yonghui Tian
Summary: Lithium niobate on insulator (LNOI) is a promising platform for high-performance photonic integrated circuits (PICs) in communication applications. Multimode waveguide bends with double air grooves are proposed and demonstrated to achieve low crosstalk for three different transverse electric (TE) modes in the wavelength range of 1525-1575 nm. The demonstrated device provides a compact solution for multimode waveguide bends, paving the way for high-speed, high-data-capacity PICs in on-chip communication systems.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Tao Ma, Shaohui Liu, Yongsheng Tian, Heng Liu, Fang Wang
Summary: A graphene-hBN-silicon hybrid plasmonic rib waveguide is designed for refractive index sensing, achieving a high FOM value by optimizing size parameters and showing remarkable propagation performance peaks. The sensing structure demonstrates good sensitivity for homogeneous and surface sensing, making it suitable for ultra-compact on-chip micro-nano photonic biochemical sensing systems.
IEEE SENSORS JOURNAL
(2021)
Article
Optics
Carlos Perez-Armenta, Alejandro Ortega-Monux, Jose Manuel Luque-Gonzalez, Robert Halir, Jens Schmid, Pavel Cheben, Inigo Molina-Fernandez, J. Gonzalo Wanguemert-Perez
Summary: A polarization-independent 2 x 2 multimode interference coupler in a 220 nm silicon-on-insulator platform is designed and experimentally demonstrated for the first time using subwavelength grating metamaterial topology to control electromagnetic properties. The coupler operates for both TE and TM polarization states with polarization dependent loss, insertion loss, imbalance all less than 1 dB, and phase errors below 5 degrees in the wavelength range from 1500 nm to 1560 nm. The device has a small footprint of 3.5 µm x 47.25 µm and is fabricated using a single etch-step process compatible with immersion deep-UV lithography with a minimum feature size of 100 nm.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Weike Zhao, Xiaolin Yi, Yingying Peng, Long Zhang, Haitao Chen, Daoxin Dai
Summary: This study uses the anisotropy of one-/two-dimensional subwavelength grating structures to achieve high-performance silicon multimode waveguide crossings. The proposed crossing exhibits compact footprints, low excess losses, and low intermode crosstalk.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Md Sohel M. Sher
Summary: This study presents a numerical demonstration of a continuous wave laser based on erbium-doped lithium niobate-on-insulator rib waveguide, emitting at around 1531 nm with optical pumping at 980 nm. Optimized laser cavities show efficient laser output, indicating potential applications in Si photonics.
OPTICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Jonathan Menahem, Dror Malka
Summary: This study proposes a design for a 1 x 4 optical demultiplexer based on silicon nitride (SiN) waveguides, which improves the performance of optical communication systems by reducing back reflection losses.
Article
Optics
Guoyan Zeng, Yuexin Yin, Yingzhi Ding, Junfeng Yang, Jun Yan, Xiaoqiang Sun, Daming Zhang
Summary: In this paper, a 4 channel WDM device with a 20 nm wavelength spacing on a silica based PLC platform is demonstrated. The device is designed using an angled AMMI structure, which requires fewer bending waveguides and results in a smaller footprint of 21 mm x 0.4 mm. It achieves a low temperature sensitivity of 10 pm/& DEG;C due to the low TOC of silica. The fabricated device exhibits high performance in terms of IL, PDL, crosstalk, and 3 dB bandwidth, and shows a high tolerance with a sensitivity of central wavelength to the width of multimode interferometer.
Article
Chemistry, Multidisciplinary
Salman Khateeb, Netanel Katash, Dror Malka
Summary: The study introduces a new design of a 2 x 1 multimode interference power combiner using SiN slot waveguide structures, which can achieve high efficiency, low reflection, and effectively combine two sources to enhance power level in the O-band range.
APPLIED SCIENCES-BASEL
(2022)
Article
Optics
Shanglin Yang, Hao Jia, Jiaqi Niu, Xin Fu, Lin Yang
Summary: In this study, we designed a CMOS-compatible ultra-compact multimode waveguide bend, which can simultaneously transmit signals of TE0, TE1, and TE2 modes with high efficiency and has low insertion loss and inter-mode crosstalk.
OPTICS COMMUNICATIONS
(2022)
Article
Crystallography
Yannong Luo, Renyou Ge, Haozhi Luo, Meiyan Wu, Lidan Zhou, Makunda Aryal, Wenwei Li, Jianhui Yuan, Jian Xu, Quanxue Lan, Yongqing Li, Xinlun Cai
Summary: The study demonstrates a polarization splitter rotator based on multimode waveguide grating on a silicon-on-insulator platform. The fabricated device shows high extinction ratio, low crosstalk, and low insertion loss, making it suitable for applications in the wavelength regime 1552 nm-1562 nm.
Article
Engineering, Electrical & Electronic
Jiaqi Wang, Huabin Qiu, Zhiwei Wei, Yuzhi Chen, Youfu Geng, Yu Du, Zhenzhou Cheng, Xuejin Li
Summary: This study introduces a graphene-based waveguide-integrated multimode phase modulator to individually modulate different modes in a multimode waveguide device. By optimizing the waveguide structures, a Mach-Zehnder interferometer modulator with different GNS patterns on each arm is designed, providing new possibilities for future high-density on-chip MDM systems.
IEEE PHOTONICS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Mohammad Amin Mahdian, Mahmoud Nikoufard
Summary: This article introduces a novel terahertz waveguide structure and investigates its application in power dividers. Through experiments and simulations, it is demonstrated that the proposed structure can effectively operate in the terahertz frequency range.
IEEE TRANSACTIONS ON NANOTECHNOLOGY
(2022)
Article
Optics
Jiaqi Wang, Xinying Zhang, Yuzhi Chen, Youfu Geng, Yu Du, Xuejin Li
Summary: A graphene-based silicon nitride waveguide-integrated spatial mode modulator has been designed to individually modulate different spatial modes in a multimode waveguide, paving the way for high-density on-chip MDM systems for optical interconnects and on-chip optical networks.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Dajian Liu, Jianghao He, Mingyu Zhu, Yuluan Xiang, Long Zhang, Ming Zhang, Yang Xu, Daoxin Dai
Summary: In this article, a high-performance silicon photonic filter is proposed and demonstrated using apodised antisymmetric multimode subwavelength gratings (MSWGs), which enable flexible manipulation of the coupling coefficient, the local effective index, and the mode profile.
LASER & PHOTONICS REVIEWS
(2023)
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
Jose Manuel Luque-Gonzalez, Alejandro Ortega-Monux, Robert Halir, Jens H. Schmid, Pavel Cheben, Inigo Molina-Fernandez, J. Gonzalo Wanguemert-Perez
Summary: Integrated metamaterials are enhancing the performance of silicon photonic chips, but achieving them at telecom wavelengths requires very high fabrication resolution. Proposed subwavelength grating metamaterials show promising control over dispersion and anisotropy, allowing for high-performance on-chip devices like beam-splitters.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Abdelfettah Hadij-ElHouati, Pavel Cheben, Alejandro Ortega-Monux, J. Gonzalo Wanguemert-Perez, Robert Halir, Jose De-Oliva-Rubio, Jens H. Schmid, Inigo Molina-Fernandez
Summary: Diffraction gratings that redirect light in a channel waveguide to an on-chip slab are becoming important in integrated photonics. By utilizing single-beam phase matching and subwavelength metamaterial refractive index engineering, off-chip radiation can be significantly reduced, allowing for new applications of distributed Bragg deflectors with minimal losses.
Article
Optics
Abdelfettah Hadij-ElHouati, Alejandro Ortega-Monux, J. Gonzalo Wanguemert-Perez, Robert Halir, Shurui Wang, Jens H. Schmid, Pavel Cheben, I Molina-Fernandez
Summary: The study introduces a demultiplexer based on a curved grating waveguide structure that separates eight channels around the central wavelength of 1550 nm with a spacing of 10 nm. The fabricated device exhibits very low insertion loss and crosstalk below -25 dB, showcasing the potential of metamaterial index engineering in achieving highly directional lateral emission in waveguide grating design.
Article
Engineering, Electrical & Electronic
David Gonzalez-Andrade, Raquel Fernandez de Cabo, Jaime Vilas, Irene Olivares, Antonio Dias, Jose Manuel Luque-Gonzalez, J. Gonzalo Wanguemert-Perez, Alejandro Ortega-Monux, Inigo Molina-Fernandez, Robert Halir, Pavel Cheben, Aitor V. Velasco
Summary: The use of a subwavelength grating phase shifter with low phase-shift errors significantly reduces crosstalk and expands operational bandwidth in silicon optical interconnects. Experimental measurements of a complete multiplexer-demultiplexer link show low insertion loss and crosstalk over a wide bandwidth.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Optics
Carlos Perez-Armenta, Alejandro Ortega-Monux, Jose Manuel Luque-Gonzalez, Robert Halir, Pedro J. Reyes-Iglesias, Jens Schmid, Pavel Cheben, Inigo Molina-Fernandez, J. Gonzalo Wanguemert-Perez
Summary: In this study, a polarization-independent optical device is designed and demonstrated using a novel metamaterial topology, achieving low-cost and broadband performance in silicon-based materials.
PHOTONICS RESEARCH
(2022)
Article
Optics
Miguel Barona-Ruiz, Carlos Perez-Armenta, Alejandro Ortega-Monux, Gonzalo Wanguemert-Perez, Inigo Molina-Fernandez, Pavel Cheben, Robert Halir
Summary: A broadband, low loss, and high extinction ratio TM-pass polarizer has been designed and implemented on the Silicon-on-Insulator platform. The polarizer utilizes a subwavelength metamaterial to engineer a Bragg grating that reflects the fundamental TE mode into the first order TE mode while allowing the TM mode to pass. Through 3D-FDTD simulations, our device achieves an extinction ratio exceeding 20 dB, insertion losses below 0.5 dB, and back-reflections of the fundamental TE mode of approximately -20 dB in a bandwidth of 150 nm.
Article
Optics
Carlos Perez-Armenta, Kevan K. Mackay, Abdelfettah Hadij-ElHouati, A. Ortega-Monux, I. Molina-Fernandez, J. Gonzalo Wanguemert-Perez, Jens H. Schmid, Pavel Cheben, Winnie N. Ye
Summary: We investigate the use of a cladding modulated Bragg grating superstructure as a dynamically tunable and reconfigurable multi-wavelength notch filter. By periodically modulating the effective index of the grating, we are able to control the bandwidth and create reflection sidebands. Experimental results show that the self-coupling coefficient of the Bragg grating can be effectively controlled through thermal tuning, with a measured bandgap and sideband separation of 1 nm and 3 nm, respectively.
Article
Optics
Carlos Perez-Armenta, Alejandro Ortega-Monux, Jose Manuel Luque-Gonzalez, Robert Halir, Jens Schmid, Pavel Cheben, Inigo Molina-Fernandez, J. Gonzalo Wanguemert-Perez
Summary: A polarization-independent 2 x 2 multimode interference coupler in a 220 nm silicon-on-insulator platform is designed and experimentally demonstrated for the first time using subwavelength grating metamaterial topology to control electromagnetic properties. The coupler operates for both TE and TM polarization states with polarization dependent loss, insertion loss, imbalance all less than 1 dB, and phase errors below 5 degrees in the wavelength range from 1500 nm to 1560 nm. The device has a small footprint of 3.5 µm x 47.25 µm and is fabricated using a single etch-step process compatible with immersion deep-UV lithography with a minimum feature size of 100 nm.
OPTICS AND LASER TECHNOLOGY
(2023)
Proceedings Paper
Optics
Robert Halir, Jonas Leuermann, Adrian Fernandez-Gavela, Callum J. Stirling, Jose Manuel Luque-Gonzalez, Pablo Ginel-Moreno, Antonia Torres-Cubillo, Ana Sanchez-Ramirez, Daniel Pereira-Martin, Alejandro Sanchez-Postigo, Carlos Perez-Armenta, Abdelfettah Hadij-ElHouati, Jose de-Oliva-Rubio, Jens H. Schmid, Alejandro Ortega-Monux, Milos Nedeljkovic, J. Gonzalo Wangueemert Perez, Pavel Cheben, Inigo Molina-Fernandez
Summary: This article reviews recent advances in building devices with breakthrough performance using subwavelength metamaterials as well as advanced sensing systems leveraging telecom techniques.
2022 PHOTONICS NORTH (PN)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
A. Sanchez-Postigo, P. Ginel-Moreno, D. Pereira-Martin, A. Hadij-ElHouati, J. M. Luque-Gonzalez, C. Perez-Armenta, J. G. Wanguemert-Perez, A. Ortega-Monux, R. Halir, J. H. Schmid, J. Soler Penades, M. Nedeljkovic, W. N. Ye, G. Z. Mashanovich, P. Cheben, I Molina-Fernandez
Summary: The engineering of subwavelength grating metamaterials plays a crucial role in silicon photonics, allowing control over optical properties and enabling the synthesis of on-chip metamaterials. Subwavelength-based devices at near-infrared wavelengths have demonstrated unprecedented performance. This paper reviews the foundations of anisotropic subwavelength grating metamaterials and discusses the latest advances in five new subwavelength-enhanced devices.
SMART PHOTONIC AND OPTOELECTRONIC INTEGRATED CIRCUITS 2022
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
R. Halir, A. Sanchez-Postigo, J. M. Luque-Gonzalez, A. Hadij-ElHouati, D. Pereira-Martin, J. Leuermann, P. Ginel-Moreno, C. Perez-Armenta, A. Torres-Cubillo, A. Herrero-Bermello, A. Dias-Ponte, D. Gonzalez-Andrade, A. V. Velasco, J. G. Wanguemert-Perez, A. Ortega-Monux, J. de-Oliva-Rubio, P. Cheben, J. H. Schmid, J. Ctyroky, M. Nedeljkovic, G. Z. Mashanovich, I Molina-Fernandez
Summary: The report highlights advances in using subwavelength metamaterials for silicon photonic devices, such as narrowband filters, antennas, polarization handling, on-chip beam forming, and sensing.
2021 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC)
(2021)
Review
Nanoscience & Nanotechnology
Jose Manuel Luque-Gonzalez, Alejandro Sanchez-Postigo, Abdelfettah Hadij-ElHouati, Alejandro Ortega-Monux, J. Gonzalo Wanguemert-Perez, Jens H. Schmid, Pavel Cheben, Inigo Molina-Fernandez, Robert Halir
Summary: The paper provides a comprehensive review of subwavelength metamaterials and their applications in silicon photonics. Through in-depth analysis of subwavelength geometry and review of latest applications, the focus is on how subwavelength structures improve device performance and expand the design space in silicon photonics.
Proceedings Paper
Optics
Alejandro Sanchez-Postigo, J. Gonzalo Wanguemert-Perez, Alejandro Ortega-Monux, Robert Halir, Daniel Pereira-Martin, Jose Manuel Luque-Gonzalez, Jens H. Schmid, Shurui Wang, Martin Vachon, Dan-Xia Xu, Jordi Soler Penades, Milos Nedeljkovic, Goran Z. Mashanovich, Pavel Cheben, Inigo Molina-Fernandez
Summary: Subwavelength patterning of planar structures is widely used in silicon photonics to synthesize metamaterials with engineered optical properties. Integrated devices based on subwavelength grating (SWG) metamaterials have shown unprecedented performance at telecom wavelengths. These benefits can also be leveraged at longer mid-infrared wavelengths.
INTEGRATED OPTICS: DEVICES, MATERIALS, AND TECHNOLOGIES XXV
(2021)
