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Near-Full Current Dynamic Range THz Quantum Cascade Laser Frequency Comb

The present study proposes a terahertz quantum cascade laser frequency comb (THz QCL FC) with a semi-insulated surface plasma waveguide characterized by a low threshold current density, high power and a wide current dynamic range. The gain dispersion value and the nonlinear susceptibility were optim...

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Detalles Bibliográficos
Autores principales: Ma, Yu, Li, Weijiang, Li, Yuanyuan, Liu, Junqi, Zhuo, Ning, Yang, Ke, Zhang, Jinchuan, Zhai, Shenqiang, Liu, Shuman, Wang, Lijun, Liu, Fengqi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964135/
https://www.ncbi.nlm.nih.gov/pubmed/36838173
http://dx.doi.org/10.3390/mi14020473
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author Ma, Yu
Li, Weijiang
Li, Yuanyuan
Liu, Junqi
Zhuo, Ning
Yang, Ke
Zhang, Jinchuan
Zhai, Shenqiang
Liu, Shuman
Wang, Lijun
Liu, Fengqi
author_facet Ma, Yu
Li, Weijiang
Li, Yuanyuan
Liu, Junqi
Zhuo, Ning
Yang, Ke
Zhang, Jinchuan
Zhai, Shenqiang
Liu, Shuman
Wang, Lijun
Liu, Fengqi
author_sort Ma, Yu
collection PubMed
description The present study proposes a terahertz quantum cascade laser frequency comb (THz QCL FC) with a semi-insulated surface plasma waveguide characterized by a low threshold current density, high power and a wide current dynamic range. The gain dispersion value and the nonlinear susceptibility were optimized based on the combination of a hybrid bound-to-continuum active region with a semi-insulated surface plasmon waveguide. Without any extra dispersion compensator, stable frequency comb operation within a current dynamic range of more than 97% of the total was revealed by the intermode beat note map. Additionally, a total comb spectral emission of about 300 GHz centered around 4.6 THz was achieved for a 3 mm long and 150 µm wide device. At 10 K, a maximum output power of 22 mW was obtained with an ultra-low threshold current density of 64.4 A·cm(−2).
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spelling pubmed-99641352023-02-26 Near-Full Current Dynamic Range THz Quantum Cascade Laser Frequency Comb Ma, Yu Li, Weijiang Li, Yuanyuan Liu, Junqi Zhuo, Ning Yang, Ke Zhang, Jinchuan Zhai, Shenqiang Liu, Shuman Wang, Lijun Liu, Fengqi Micromachines (Basel) Article The present study proposes a terahertz quantum cascade laser frequency comb (THz QCL FC) with a semi-insulated surface plasma waveguide characterized by a low threshold current density, high power and a wide current dynamic range. The gain dispersion value and the nonlinear susceptibility were optimized based on the combination of a hybrid bound-to-continuum active region with a semi-insulated surface plasmon waveguide. Without any extra dispersion compensator, stable frequency comb operation within a current dynamic range of more than 97% of the total was revealed by the intermode beat note map. Additionally, a total comb spectral emission of about 300 GHz centered around 4.6 THz was achieved for a 3 mm long and 150 µm wide device. At 10 K, a maximum output power of 22 mW was obtained with an ultra-low threshold current density of 64.4 A·cm(−2). MDPI 2023-02-18 /pmc/articles/PMC9964135/ /pubmed/36838173 http://dx.doi.org/10.3390/mi14020473 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ma, Yu
Li, Weijiang
Li, Yuanyuan
Liu, Junqi
Zhuo, Ning
Yang, Ke
Zhang, Jinchuan
Zhai, Shenqiang
Liu, Shuman
Wang, Lijun
Liu, Fengqi
Near-Full Current Dynamic Range THz Quantum Cascade Laser Frequency Comb
title Near-Full Current Dynamic Range THz Quantum Cascade Laser Frequency Comb
title_full Near-Full Current Dynamic Range THz Quantum Cascade Laser Frequency Comb
title_fullStr Near-Full Current Dynamic Range THz Quantum Cascade Laser Frequency Comb
title_full_unstemmed Near-Full Current Dynamic Range THz Quantum Cascade Laser Frequency Comb
title_short Near-Full Current Dynamic Range THz Quantum Cascade Laser Frequency Comb
title_sort near-full current dynamic range thz quantum cascade laser frequency comb
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9964135/
https://www.ncbi.nlm.nih.gov/pubmed/36838173
http://dx.doi.org/10.3390/mi14020473
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