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Proceedings Paper

An ultra-high contrast optical modulator with 30 dB isolation at 1.55 µm with 25 THz bandwidth
Author(s): Mohsen Jafari; Mina Rais-Zadeh
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Paper Abstract

This paper presents a high-contrast electro-optical modulator with record-breaking amplitude modulation index of 27 dB and forward loss of < 3 dB at 1.5 μm. The high contrast is achieved by utilizing slit and surface plasmon polariton resonances in an array of gold lines filled with a phase change material (Germanium Telluride-GeTe). Stacking multiple layers of the phase change plasmonic grating enabled development of the high-index modulator in chip scale dimensions at telecommunication wavelength. Coupling the optical modes of multiple layers results in such a high contrast when GeTe goes through crystallographic phase transition. Phase transition through joule-heating is achieved by employing a matching circuit.

Paper Details

Date Published: 23 August 2017
PDF: 8 pages
Proc. SPIE 10382, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI, 1038211 (23 August 2017); doi: 10.1117/12.2278918
Show Author Affiliations
Mohsen Jafari, Univ. of Michigan (United States)
Mina Rais-Zadeh, Univ. of Michigan (United States)
NASA Jet Propulsion Lab. (United States)


Published in SPIE Proceedings Vol. 10382:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI
Shizhuo Yin; Ruyan Guo, Editor(s)

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