High-Speed Electro-Optic Modulator Integrated with Graphene-Boron Nitride Heterostructure and Photonic Crystal Nanocavity
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Author(s)
Gao, Yuanda
Gan, Xuetao
Meric, Inanc
Wang, Lei
Szep, Attila
Walker, Dennis
Hone, James
Shiue, Ren-Jye
Li, Luozhou
Peng, Cheng
Date Issued
March 2015
Journal
Nano Letters
Publisher
American Chemical Society (ACS)
Citation
Gao, Yuanda et al. “High-Speed Electro-Optic Modulator Integrated with Graphene-Boron Nitride Heterostructure and Photonic Crystal Nanocavity.” Nano Letters 15, 3 (March 2015): 2001–2005 © 2015 American Chemical Society
Version
Original manuscript
Abstract
Nanoscale and power-efficient electro-optic (EO) modulators are essential components for optical interconnects that are beginning to replace electrical wiring for intra- and interchip communications.1-4 Silicon-based EO modulators show sufficient figures of merits regarding device footprint, speed, power consumption, and modulation depth.5-11 However, the weak electro-optic effect of silicon still sets a technical bottleneck for these devices, motivating the development of modulators based on new materials. Graphene, a two-dimensional carbon allotrope, has emerged as an alternative active material for optoelectronic applications owing to its exceptional optical and electronic properties.12-14 Here, we demonstrate a high-speed graphene electro-optic modulator based on a graphene-boron nitride (BN) heterostructure integrated with a silicon photonic crystal nanocavity. Strongly enhanced light-matter interaction of graphene in a submicron cavity enables efficient electrical tuning of the cavity reflection. We observe a modulation depth of 3.2 dB and a cutoff frequency of 1.2 GHz. Keywords: boron nitride; electro-optic modulator; graphene; Optoelectronics; photonic crystal
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1021/NL504860Z
