Article
Optics
Cameron M. Naraine, Jocelyn N. Westwood-Bachman, Cameron Horvath, Mirwais Aktary, Andrew P. Knights, Jens H. Schmid, Pavel Cheben, Jonathan D. B. Bradley
Summary: Subwavelength grating (SWG) metamaterial waveguides and ring resonators on a silicon nitride platform are proposed and demonstrated. The SWG waveguide achieves a large overlap (53%) of the Bloch mode with the top cladding material, showing great potential for evanescent field sensing and light amplification. Fabricated using a commercial rapid turn-around silicon nitride prototyping foundry process, the devices have critical dimensions greater than 100 nm. Experimental characterization reveals excellent internal quality factor (2.11 x 10(5)) and low propagation loss (approximately 1.5 dB cm(-1)) in the C-band, surpassing silicon-based SWG ring resonators. These results demonstrate the promising prospects of SWG metamaterial structures for silicon nitride based photonic integrated circuits.
LASER & PHOTONICS REVIEWS
(2023)
Article
Multidisciplinary Sciences
Yue Dong, Yu Liu, Yin Xu, Bo Zhang
Summary: An integrated TM-pass/TE-stop polarizer centered at 850 nm is designed in this paper. By utilizing tilted subwavelength gratings (SWG), the proposed polarizer achieves high TM and low TE transmission. Geometries optimization further improves the performance of the polarizer.
Article
Materials Science, Multidisciplinary
Kevan K. MacKay, Shurui Wang, Pavel Cheben, Winnie N. Ye
Summary: This paper experimentally demonstrates a novel multimode waveguide implemented on a SOI platform, which supports multiple TE/TM modes across a wide range of wavelengths. Through optimized design and structure, it achieves low losses and cross-talk, showing good performance and reliability in practical applications.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Electrical & Electronic
Darpan Mishra, Manoranjan Minz, Ramesh Kumar Sonkar
Summary: This paper presents a subwavelength grating based multiplexer on a silicon photonics platform, which can multiplex three transverse electric modes. The designed device has broadband operation over the entire optical telecom bands, and shows good transmission characteristics.
NANO COMMUNICATION NETWORKS
(2023)
Article
Optics
Mengjia Lu, Chunyu Deng, Pengfei Zheng, Pengcheng Liu, Dongdong Lin, Guohua Hu, Binfeng Yun, Yiping Cui
Summary: The ultra-compact TE-mode-pass power splitter using SWGs and HPWs achieves efficient power splitting and polarization handling in a compact size. Simulation results demonstrate low insertion loss and high extinction ratio at a wavelength of 1.55 μm.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Zaid Lateef Hussain, Raad S. Fyath
Summary: This paper presents a low loss, ultra-broadband, and high-order mode (de)multiplexer utilizing subwavelength grating (SWG) technology supporting 12-TE polarized modes (TE0-to-TE11) based on waveguides cascading structure.
Article
Engineering, Electrical & Electronic
Weifeng Jiang, Shuangye Xu
Summary: The experimental demonstration of mode-splitting through metamaterial engineering of bridged subwavelength gratings (BSWGs) shows promising results for optical communications and interconnects. The designed device, fabricated using CMOS-compatible processes, exhibits low insertion losses and mode crosstalks, making it a potential candidate for mode manipulation in MDM systems.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Zejie Yu, Hongnan Xu, Dajian Liu, Huan Li, Yaocheng Shi, Daoxin Dai
Summary: This paper reviews recent advances in high-performance silicon polarization-handling devices assisted with subwavelength structures. These devices have the characteristics of compact size, high performance, and wide bandwidth. The paper introduces different types of polarization-handling devices and their principles, and discusses the challenges and opportunities of silicon polarization-handling devices.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Ishtiaque Ahmed, Syed Z. Ahmed, Nafiz Jaidye, Md Borhan Mia, Ayrton Bernussi, Sangsik Kim
Summary: Optical delay lines control the flow of light by introducing phase and group delays, crucial for engineering interferences and ultrashort pulses. Photonic integration of such delay lines is crucial for chip-scale lightwave signal processing and pulse control. However, typical delay lines based on long spiral waveguides require large chip footprints. We propose a scalable, high-density integrated delay line using a skin-depth engineered subwavelength grating waveguide, which reduces crosstalk between waveguides and saves chip footprint area.
Article
Optics
Alejandro Sanchez-Postigo, Alejandro Ortega-Monux, Jordi Soler Penades, Ahmed Osman, Milos Nedeljkovic, Zhibo Qu, Yangbo Wu, Inigo Molina-Fernandez, Pavel Cheben, Goran Z. Mashanovich, J. Gonzalo Wanguemert-Perez
Summary: A suspended germanium waveguide design with a subwavelength metamaterial cladding has been proposed to overcome the limitations of traditional platforms in terms of intrinsic losses and complex fabrication processes. These waveguides can be fabricated in a simple dry and wet etch step, with a measured propagation loss of 5.3 dB/cm at a wavelength of 7.7 μm, opening the door for the development of integrated devices covering the mid-infrared band up to approximately 15 μm.
Article
Engineering, Electrical & Electronic
Hao Sun, Bruno Taglietti, Yue Wang, Lawrence R. Chen
Summary: Bragg gratings (BGs) are widely used in microwave photonic signal processing and systems due to their customizable amplitude and phase responses. Waveguide BGs (WBGs) are compact and easily integrated with other components to build MWP systems. Subwavelength grating (SWG) waveguides and passive devices in silicon-on-insulator (SOI) have enabled the development of breakthrough devices based on anisotropic metamaterials.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
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.
Article
Optics
Yufei Chen, Jiao Zhang, Min Zhu, Shengbao Wu, Jinbao Xiao
Summary: In this paper, an ultra-compact and broadband all-silicon TM-pass power splitter is experimentally demonstrated for the first time. The power splitter utilizes holey-structured waveguides to achieve wide stop-band for TE-polarized light, low loss transmission for TM-polarized light, and flattened TM dispersion, enabling broadband power splitting for TM polarization.
Article
Engineering, Electrical & Electronic
Ali Lalbakhsh, Muhammad U. Afzal, Karu P. Esselle, Stephanie L. Smith
Summary: This article presents a novel technique for designing a low-cost frequency-selective surface (FSS) bandpass filter. The proposed filter has a large controllable operational frequency band and can support all polarizations. The filter's characteristics are verified through circuital and modal analyses, and simulated and measured results show low sensitivity to different polarizations and oblique angles of incidence.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Engineering, Electrical & Electronic
Alexander Chen, Amir Begovic, Stephen Anderson, Zhaoran Rena Huang
Summary: Si photonic foundry fabricated cascaded and continuous spiral shaped silicon nitride waveguides with Bragg grating structures to achieve on-chip true-time delay line. Time-domain measurement method was used to characterize the delay time, and the highest group index extracted from cascaded SiN grating waveguides is 19.7, while the continuous spiral SiN grating waveguide produces a delay time of 3.78 ns.
IEEE PHOTONICS JOURNAL
(2022)
Review
Engineering, Biomedical
Winnie N. Ye, Madhura Thipse, Maleka Ben Mahdi, Sharlin Azad, Ross Davies, Marc Ruel, Marc A. Silver, Lale Hakami, Thierry Mesana, Frans Leenen, Tofy Mussivand
Article
Optics
Dusan Gostimirovic, Francesco De Leonardis, Richard Soref, Vittorio M. N. Passaro, Winnie N. Ye
Article
Engineering, Electrical & Electronic
Tianyi Hao, Alejandro Sanchez-Postigo, Pavel Cheben, Alejandro Ortega-Monux, Winnie N. Ye
IEEE PHOTONICS TECHNOLOGY LETTERS
(2020)
Article
Optics
Pablo Ginel-Moreno, Daniel Pereira-Martin, Abdelfettah Hadij-ElHouati, Winnie N. Ye, Daniele Melati, Dan-Xia Xu, Siegfried Janz, Alejandro Ortega-Monux, J. Gonzalo Wanguemert-Perez, Robert Halir, Inigo Molina-Fernandez, Jens H. Schmid, Pavel Cheben
Article
Optics
Dusan Gostimirovic, Winnie N. Ye
Summary: This study presents a microdisk-based silicon-photonic mode-division (de)multiplexer circuit compatible with wavelength-division multiplexing, offering high performance and potential applications for next-generation data processing and communication.
Article
Optics
Shahrzad Khajavi, Daniele Melati, Pavel Cheben, Jens H. Schmid, Qiankun Liu, Dan Xia Xu, Winnie N. Ye
Summary: The antenna design utilizes subwavelength L-shaped radiating elements for high efficiency and compact size, suitable for optical communication applications.
Article
Engineering, Electrical & Electronic
Dusan Gostimirovic, Winnie N. Ye
Summary: The orientation and positioning of pn junctions play a crucial role in the performance of optoelectronic modulators, with vertical pn junctions showing promise in improving energy efficiency. New designs such as double vertical junctions offer increased interaction length and energy efficiency improvements. Comprehensive numerical comparisons demonstrate the potential of these new designs in enhancing power performance characteristics.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2021)
Article
Optics
Daniel Pereira-Martin, Jose Manuel Luque-Gonzalez, J. Gonzalo Wanguemert-Perez, Abdelfettah Hadij-ElHouati, Inigo Molina-Fernandez, Pavel Cheben, Jens H. Schmid, Shurui Wang, Winnie N. Ye, Jiri Ctyroky, Alejandro Ortega-Monux
Summary: The paper proposes a novel design approach for complex Bragg filters in silicon waveguides with laterally coupled Bragg loading segments, allowing for arbitrary spectral response. The design features a delocalized mode field to reduce sensitivity to fabrication errors and utilizes layer-peeling and layer-adding algorithms for efficient synthesis of target spectra. The concept and methodology are validated through the design and experimental demonstration of a complex spectral filter in an SOI platform.
Article
Optics
Pablo Ginel-Moreno, Alejandro Sanchez-Postigo, Jose De-Oliva-Rubio, Abdelfettah Hadij-ElHouati, Winnie N. Ye, J. Gonzalo Wanguemert-Perez, Inigo Molina-Fernandez, Jens H. Schmid, Pavel Cheben, Alejandro Ortega-Monux
Summary: This study presents a novel strategy for creating long antennas in silicon waveguides using a metamaterial subwavelength grating (SWG) waveguide core loaded with a lateral periodic array of radiative elements. This arrangement allows for weak antenna radiation strength while maintaining a relatively large minimum feature size.
Article
Chemistry, Multidisciplinary
Qiankun Liu, Daniel Benedikovic, Tom Smy, Ahmad Atieh, Pavel Cheben, Winnie N. Ye
Summary: In this paper, a numerical analysis is conducted on a 2D circular optical phased array (OPA) with radially arranged nano-antennas. The results show that the circular array can effectively suppress sidelobes, expand the range for beam steering, and achieve narrow beamwidths. By integrating more elements, the performance of circular OPAs can be further improved.
Article
Chemistry, Analytical
Daniel Benedikovic, Qiankun Liu, Alejandro Sanchez-Postigo, Ahmad Atieh, Tom Smy, Pavel Cheben, Winnie N. Ye
Summary: Light detection and ranging systems based on optical phased arrays and integrated silicon photonics have been widely used in various applications. This paper presents a design of two-dimensional optical phased arrays with improved beam steering performance and large element spacing, which opens up new opportunities for on-chip photonic applications in the future.
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
Chemistry, Analytical
William Fraser, Winnie N. Ye
Summary: Metalenses are planar optical components that enable high-efficiency subwavelength focusing without the bulkiness of traditional lenses. In this work, a binary phase Fresnel zone plate metalens is proposed for the standard 500 nm silicon-on-insulator platform, using subwavelength gratings with trapezoidal segmentation to form concentric rings. The metalens design can be easily tuned to achieve longer focal lengths at different wavelengths, making it suitable for various applications in free-space optics.
Article
Optics
Niharika Kohli, Michael Menard, Winnie N. Ye
Article
Optics
Neha Purwaha, Ahmad Atieh, Winnie N. Ye
