基于电驱动有源超材料的太赫兹量子级联激光器外部调制器

Metamaterials Pub Date : 2010-08-01 DOI:10.1016/j.metmat.2010.04.005

X.G. Peralta , I. Brener , W.J. Padilla , E.W. Young , A.J. Hoffman , M.J. Cich , R.D. Averitt , M.C. Wanke , J.B. Wright , H.-T. Chen , J.F. O’Hara , A.J. Taylor , J. Waldman , W.D. Goodhue , J. Li , J. Reno

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引用次数: 17

摘要

我们已经设计，制造和测量了作为太赫兹量子级联激光器外部调制器的电驱动有源超材料。调制是通过对超材料层施加电压来实现的，该超材料层主动取代n掺杂层中的载流子，从而导致最低超材料响应的阻尼和频率位置的变化。我们演示了它们在2.4和2.8太赫兹下的工作，并获得了最大调制深度约60%的调制线性度。

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External modulators for TeraHertz Quantum Cascade Lasers based on electrically-driven active metamaterials

We have designed, fabricated and measured electrically-driven active metamaterials which operate as external modulators for TeraHertz Quantum Cascade Lasers. The modulation is achieved by applying a voltage to the metamaterial layer which actively displaces carriers from the n-doped layer causing changes in damping and frequency location of the lowest metamaterial response. We demonstrate their operation at 2.4 and 2.8 TeraHertz and obtain a maximum modulation depth of ∼60% with a large degree of modulation linearity.

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Metamaterials

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