Graphene-assisted critically-coupled optical ring modulator

Year: 2012

Authors: Midrio M., Boscolo S., Moresco M., Romagnoli M., De Angelis C., Locatelli A., Capobianco A.D.

Autors Affiliation: Dipartimento di Ingegneria Elettrica Gestionale e Meccanica, Università degli Studi di Udine, 33100 Udine, Italy; PhotonIC Corporation, 5800 Uplander Way, Los Angeles, CA 90230, USA; Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA; Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Brescia, 25123 Brescia, Italy; Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Padova, 35131 Padova, Italy

Abstract: Graphene\’s conductivity at optical frequencies can be varied upon injection of carriers. In the present paper, this effect is used to modulate losses of an optical wave traveling inside a ring cavity. This way an optical modulator based on the critical-coupling concept first introduced by Yariv can be realized. Through numerical simulations, we show that a modulator featuring a bandwidth as large as 100 GHz can be designed with switching energy in the order of few fJ per bit. Also, we show that operations with driving voltages below 1.2 volt could be obtained, thus making the proposed modulator compatible with requirements of low-voltage CMOS technology. (C) 2012 Optical Society of America

Journal/Review: OPTICS EXPRESS

Volume: 20 (21)      Pages from: 23144  to: 23155

KeyWords: Graphene photonics
DOI: 10.1364/OE.20.023144

Citations: 67
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