Terahertz emission from localized modes in one-dimensional disordered systems [Invited]

Terahertz emission from localized modes in one-dimensional disordered systems [Invited]

We demonstrate terahertz (THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of a THz quantum cascade laser. Multiple emission peaks are observed within a freque...

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Bibliographic Details
Main Authors: Zeng, Yongquan, Liang, Guozhen, Qiang, Bo, Meng, Bo, Liang, Hou Kun, Mansha, Shampy, Li, Jianping, Li, Zhaohui, Li, Lianhe, Davies, Alexander Giles, Linfield, Edmund Harold, Zhang, Ying, Chong, Yidong, Wang, Qi Jie
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2021
Subjects:
Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Multiple Scattering
Terahertz Emissions
Online Access:https://hdl.handle.net/10356/147822
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Institution: Nanyang Technological University
Language: English
Description
Summary:We demonstrate terahertz (THz) frequency laser emission around 3.2 THz from localized modes in one-dimensional disordered grating systems. The disordered structures are patterned on top of the double-metal waveguide of a THz quantum cascade laser. Multiple emission peaks are observed within a frequency range corresponding to the bandgap of a periodic counterpart with no disorder, indicating the presence of mode localization aided by Bragg scattering. Simulations and experimental measurements provide strong evidence for the spatial localization of the THz laser modes.

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