{"id":988,"date":"2021-06-01T17:22:05","date_gmt":"2021-06-01T17:22:05","guid":{"rendered":"https:\/\/parque.online\/polariton\/?p=988"},"modified":"2025-06-02T15:57:24","modified_gmt":"2025-06-02T15:57:24","slug":"500-ghz-plasmonic-mach-zehnder-modulator","status":"publish","type":"page","link":"https:\/\/www.polariton.ch\/polarisandbox\/?page_id=988","title":{"rendered":"500 GHz plasmonic Mach-Zehnder modulator"},"content":{"rendered":"

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500\u00a0GHz plasmonic Mach-Zehnder modulator enabling sub-THz microwave photonics<\/span><\/h1>\n<\/h1>\n
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Burla, Maurizio, et al. “500 GHz plasmonic Mach-Zehnder modulator enabling sub-THz microwave photonics.”\u00a0<\/span>Apl Photonics<\/i>\u00a04.5 (2019): 056106.<\/span><\/div>\n<\/div>\n<\/div>\n
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Abstract:<\/span><\/h4>\n<\/div>\n
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Broadband electro-optic intensity modulators are essential to convert electrical signals to the optical domain. The growing interest in terahertz wireless applications demands modulators with frequency responses to the sub-terahertz range, high power handling, and very low nonlinear distortions, simultaneously. However, a modulator with all those characteristics has not been demonstrated to date. Here, we experimentally demonstrate that plasmonic modulators do not trade-off any performance parameter, featuring\u2014at the same time\u2014a short length of tens of micrometers, record-high flat frequency response beyond 500\u00a0GHz, high power handling, and high linearity, and we use them to create a sub-terahertz radio-over-fiber analog optical link.<\/span><\/div>\n
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These devices have the potential to become a new tool in the general field of microwave photonics, making the sub-terahertz range accessible to, e.g., 5G wireless communications, antenna remoting, Internet of Things, sensing, and more.<\/span><\/div>\n<\/div>\n<\/blockquote>\n
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500 GHz plasmonic Mach-Zehnder modulator enabling sub-THz microwave photonics<\/h3>\n<\/div>\n
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FIG. 1.<\/span>\u00a0(a) A THz wireless communication scenario. (b) At the remote antenna unit (RAU), THz wireless signals are received by an antenna and converted to the optical domain to be transported over a radio-over-fiber analog link. A modulator with sub-THz bandwidth, high linearity, and high-power handling is needed to encode the THz signal onto an optical carrier with high fidelity. Inset: (b1) micrograph of a plasmonic Mach-Zehnder modulator with a plasmonic phase modulator in each arm; (b2) image of the 120 nm-wide, 20\u00a0<\/span>\u03bc<\/i>m-long phase modulator slot waveguide<\/span><\/p>\n<\/div>\n

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