Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Coupling Nanowire Quantum Dots to Optical Waveguides by Microsphere-Induced Photonic Nanojet
Δημιουργός/Συγγραφέας:	Tsintzos, Symeon I. Tsimvrakidis, Konstantinos Gates, James C. Elshaari, Ali W. Smith, Peter G. R. Zwiller, Val [EL] Ριζιώτης, Χρήστος Δ.[EN] Riziotis, Christos
Ημερομηνία:	2024
Γλώσσα:	Αγγλικά
ISSN:	2304-6732
DOI:	10.3390/photonics11040343
Περίληψη:	Silica-on-silicon is a major optical integration platform, while the emergent class of the integrated laser-written circuits’ platform offers additionally high customizability and flexibility for rapid prototyping. However, the inherent waveguides’ low core/cladding refractive index contrast characteristic, compared to other photonic platforms in silicon or silicon nitride, sets serious limitations for on-chip efficient coupling with single photon emitters, like semiconductor nanowires with quantum dots, limiting the applications in quantum computing. A new light coupling scheme proposed here overcomes this limitation, providing means for light coupling >50%. The scheme is based on the incorporation of an optical microsphere between the nanowire and the waveguide, which is properly optimized and arranged in terms of size, refractive index, and the distance of the microsphere between the nanowire and waveguide. Upon suitable design of the optical arrangement, the photonic nanojet emitted by the illuminated microsphere excites efficiently the guided eigenmodes of the input channel waveguide, thus launching light with high-coupling efficiency. The method is tolerant in displacements, misalignments, and imperfections and is fabricationally feasible by the current state of art techniques. The proposed method enables the on-chip multiple single photon emitters’ integration, thus allowing for the development of highly customizable and scalable quantum photonic-integrated circuits for quantum computing and communications.
Τίτλος πηγής δημοσίευσης:	Photonics
Τόμος/Κεφάλαιο:	11
Τεύχος:	4
Θεματική Κατηγορία:	[EL] Εφαρμοσμένη οπτική. Φωτονική[EN] Applied optics. Photonics
Λέξεις-Κλειδιά:	waveguides nanowires quantum dots quantum emitters microspheres photonic nanojet silica quantum circuits quantum computing
Χρηματοδότης:	Hellenic Foundation for Research and Innovation (H.F.R.I.)
EU Grant:	First Call for H.F.R.I. Research Projects to support Faculty members and Researchers and the procurement of high-cost research equipment grant
EU Grant identifier:	HFRI-FM17-640
Κάτοχος πνευματικών δικαιωμάτων:	© 2024 by the authors. Licensee MDPI, Basel, Switzerland.
Όροι και προϋποθέσεις δικαιωμάτων:	This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.3390/photonics11040343
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο