1. Αποθετήριο Παραδοτέων Υποτρόφων Δράσεων ΕΣΠΑ Τριτοβάθμιας Εκπαίδευσης 2017-2023
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Τύπος:	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Comparative study of silicon photonic modulators based on transparent conducting oxide and graphene
Συγγραφέας:	[EL] Σινάτκας, Γεώργιος[EN] Sinatkas, Georgios [EL] Χριστόπουλος, Θωμάς[EN] Christopoulos, Thomas [EL] Τσιλιπάκος, Οδυσσέας[EN] Tsilipakos, Odysseas [EL] Κριεζής, Εμμανουήλ[EN] Kriezis, Emmanouil
Ημερομηνία:	10/12/2019
Περίληψη:	Transparent conducting oxides (TCOs) and graphene have been extensively investigated as promising materials for electro-optic modulation applications due to their dynamically configurable near-infrared properties. In this study, a detailed comparison between modulators comprising either a TCO film or a graphene-insulator-graphene structure is presented, considering a conventional silicon photonic waveguide as the underlying physical system. Both in-line and resonant configurations are investigated, integrating an electro-optic switching mechanism that changes the free-carrier concentration in the configurable material by means of electrical gating. The carrier-concentration change effect is rigorously modeled using solid-state physics principles, providing a physically consistent and straightforward comparison between the investigated material platforms. The performance of the designed modulators is thoroughly evaluated in terms of the extinction ratio, insertion loss, energy consumption, and bandwidth in both TE and TM operation. On the whole, both technologies support high-performance optical modulation, with TCO designs exhibiting an up to 40 % smaller footprint, with their graphene counterparts standing out for their subpicojoule-per-bit performance on a physical system as simple as the employed silicon-wire waveguide. The low insertion losses as well as the impressive over-100-GHz switching speeds suggest both TCOs and graphene as very promising material candidates for future on-chip modulation applications.
Γλώσσα:	Αγγλικά
Σελίδες:	16
DOI:	10.1103/PhysRevApplied.12.064023
EISSN:	2331-7019
Θεματική κατηγορία:	[EL] Επιστήμες Μηχανικού και Τεχνολογία[EN] Engineering and Technology [EL] Επιστήμη Ηλεκτρολόγου Μηχανικού, Ηλεκτρονικού Μηχανικού, Μηχανικού Η/Υ[EN] Electrical engineering, Electronic engineering, Information engineering [EL] Νανοτεχνολογία[EN] Nano-technology
Λέξεις-κλειδιά:	Φωτονική τεχνολογία πυριτίου; Silicon photonics; Οπτοηλεκτρονική; Optoelectronics; Φυσική ημιαγωγών; Semiconductor physics; Ηλεκτρο-οπτικοί διαμορφωτές; Electro-optic modulators; Αγώγιμα διαφανή οξείδια; Transparent conducting oxides; Γραφένιο; Graphene; Φαινόμενα ελεύθερων φορέων; Free-carrier effects
Κάτοχος πνευματικών δικαιωμάτων:	© 2019 American Physical Society
Όροι και προϋποθέσεις δικαιωμάτων:	Statement of Copyright Copyright © 2011 by American Physical Society. All rights reserved. Individual articles are copyrighted by the APS, as indicated on each article. Individual articles may be downloaded for personal use; users are forbidden to reproduce, republish, redistribute, or resell any materials from this journal in either machine-readable form or any other form without permission of the APS or payment of the appropriate royalty for reuse. For permissions and other copyright-related questions, please email your question to: assocpub@aps.org
Ηλεκτρονική διεύθυνση του τεκμηρίου στον εκδότη:	https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.12.064023
Ηλεκτρονική διεύθυνση περιοδικού:	https://journals.aps.org/prapplied/
Τίτλος πηγής δημοσίευσης:	Physical Review Applied
Τεύχος:	6
Τόμος:	12
Σελίδες τεκμηρίου (στην πηγή):	Article no 064023
Εμφανίζεται στις συλλογές:	Ερευνητικές ομάδες