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Photonics
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Advances of Silicon Photonics
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Advances of Silicon Photonics

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 10592

Special Issue Editors

Prof. Dr. Xiaochuan Xu

E-Mail Website
Guest Editor
School of Integrated Circuits, Harbin Institute of Technology, Shenzhen 518055, China
Interests: silicon photonics; sensors; optical interconnects
Special Issues, Collections and Topics in MDPI journals
Dr. Yi Zou

E-Mail Website
Guest Editor
School of Information Science and Technology, ShanghaiTech University, Shanghai, China
Interests: integrated photonics; nanophotonics; fiber optics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is our great pleasure to invite you to contribute to the Special Issue of Photonics dedicated to recent advances in silicon photonics.

Silicon photonics is a disruptive and enabling technology that combines high density circuits of high-index-contrast waveguides, with the economic potential for volume production with semiconductor manufacturing facilities. In the past decade, driven by the ever-increasing demand for power efficient and large bandwidth data communication, silicon photonics has experienced a phenomenal transformation from academic research to industrial technology. Nowadays, with the capability of integrating thousands of devices, silicon photonics is also revolutionizing many other fields, such as light detection and ranging (LIDAR) for autonomous vehicles and lab-on-a-chip (LoC) biological sensors for point-of-care testing (POCT).

This Special Issue aims to put together a collection of papers covering the frontiers of silicon photonics and highlighting the most recent scientific discoveries and trends in this field. Topics include but not limited to the following:

(1) Novel silicon photonics devices, including modulators, switches, subwavelength structure based devices, and hybrid integrated devices;

(2) Application-specific silicon photonics circuits, including LIDAR, optical information processing, and optical coherent tomography (OCT);

(3) Silicon photonics devices and circuits for optical computing, quantum optics, and microwave photonics;

(4) Silicon photonics based sensors, including biological sensors, chemical sensors, and LoC systems.

Dr. Xiaochuan Xu
Dr. Yi Zou
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Photonics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

8 pages, 6604 KiB  
Communication
Compact Wavelength Selective Crossbar Switch with Cascaded First Order Micro-Ring Resonators
by Akhilesh S. P. Khope, Robert Zhang, Roger Helkey, Rod C. Alferness, Adel A. M. Saleh and John E. Bowers
Photonics 2022, 9(2), 60; https://doi.org/10.3390/photonics9020060 - 24 Jan 2022
Cited by 4 | Viewed by 3190
Abstract
We demonstrate a compact 4×4 wavelength selective switch with 50% fewer electrical signal pads as compared with our previous generation. We report loss and crosstalk for different paths of the switch. We measure median loss of 5.32 dB and worst case [...] Read more.
We demonstrate a compact 4×4 wavelength selective switch with 50% fewer electrical signal pads as compared with our previous generation. We report loss and crosstalk for different paths of the switch. We measure median loss of 5.32 dB and worst case crosstalk of −35 dB. The microring resonators tune by more than one free spectral range, which is an improvement over our previous generation of switches. This switch can support 8 channels at 400 GHz spacing. We conclude that it is possible to drive both microring resonators with the same voltage and separate control is not required if the fabrication variation reduces in the future. Full article
(This article belongs to the Special Issue Advances of Silicon Photonics)
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15 pages, 12542 KiB  
Article
Asymmetric Concentric Microring Resonator Label-Free Biosensors
by Pedro Chamorro-Posada
Photonics 2022, 9(1), 27; https://doi.org/10.3390/photonics9010027 - 3 Jan 2022
Cited by 6 | Viewed by 2038
Abstract
A study of label-free silicon nitride asymmetric double-microring resonators is presented. The use of highly accurate 3D vector modal techniques permits an extensive exploration of the parameter space defining the architecture of the proposed device in the search for optimal geometries and reaching [...] Read more.
A study of label-free silicon nitride asymmetric double-microring resonators is presented. The use of highly accurate 3D vector modal techniques permits an extensive exploration of the parameter space defining the architecture of the proposed device in the search for optimal geometries and reaching configurations not addressed in previous studies that had been limited to symmetrical configurations. Asymmetry, on the other hand, permits to access resonances that exploit the radiation-quenching properties of the structure in an optimal way. The analysis presented also includes the effect of absorption in the sensor aqueous cladding that is generally omitted. The results of the numerical survey indicate that the optimized geometries bring about a substantive performance improvement at small microring radii that are impractical for more conventional single-ring geometries due to the high radiation losses. Therefore, lower footprint devices, and a larger scale of integration, can be attained with the proposed structure. Full article
(This article belongs to the Special Issue Advances of Silicon Photonics)
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8 pages, 2971 KiB  
Article
High-Q-Factor Tunable Silica-Based Microring Resonators
by Yue-Xin Yin, Xiao-Pei Zhang, Xiao-Jie Yin, Yue Li, Xin-Ru Xu, Jun-Ming An, Yuan-Da Wu, Xiao-Ping Liu and Da-Ming Zhang
Photonics 2021, 8(7), 256; https://doi.org/10.3390/photonics8070256 - 4 Jul 2021
Cited by 11 | Viewed by 4128
Abstract
A high-Q-factor tunable silica-based microring resonator (MRR) is demonstrated. To meet the critical-coupling condition, a Mach–Zehnder interferometer (MZI) as the tunable coupler was integrated with a racetrack resonator. Then, 40 mW electronic power was applied on the microheater on the arm of MZI, [...] Read more.
A high-Q-factor tunable silica-based microring resonator (MRR) is demonstrated. To meet the critical-coupling condition, a Mach–Zehnder interferometer (MZI) as the tunable coupler was integrated with a racetrack resonator. Then, 40 mW electronic power was applied on the microheater on the arm of MZI, and a maximal notch depth of about 13.84 dB and a loaded Q factor of 4.47 × 106 were obtained. The proposed MRR shows great potential in practical application for optical communications and integrated optics. Full article
(This article belongs to the Special Issue Advances of Silicon Photonics)
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