High-power 2.2 THz quantum-cascade laser with sixth-order distributed feedback

Fei Jia; Sadhvikas J. Addamane; John L. Reno; Sushil Kumar

doi:10.1063/5.0273563

High-power 2.2 THz quantum-cascade laser with sixth-order distributed feedback

Fei Jia
, Sadhvikas J. Addamane
, John L. Reno
, Sushil Kumar

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A distributed-feedback (DFB) scheme with sixth-order Bragg gratings realizes high-power emission for low-frequency single-mode terahertz quantum-cascade lasers (QCLs). The gratings are implemented in top claddings of plasmonic metallic cavities of the QCLs with four appropriately placed radiating slits per period. A peak optical power of 112 mW is detected for a 2.2 THz surface-emitting QCL in a single-lobed beam at 59 K , with a maximum operating temperature of 97 K in pulsed-mode. Numerical modeling indicates that the DFB scheme allows for a large variation of the radiative loss by adjusting the slits, and hence may be suitable for different types of QCL active regions.

Original language	English
Article number	261101
Journal	Applied Physics Letters
Volume	126
Issue number	26
DOIs	https://doi.org/10.1063/5.0273563
State	Published - Jun 30 2025
Externally published	Yes

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title = "High-power 2.2 THz quantum-cascade laser with sixth-order distributed feedback",

abstract = "A distributed-feedback (DFB) scheme with sixth-order Bragg gratings realizes high-power emission for low-frequency single-mode terahertz quantum-cascade lasers (QCLs). The gratings are implemented in top claddings of plasmonic metallic cavities of the QCLs with four appropriately placed radiating slits per period. A peak optical power of 112 mW is detected for a 2.2 THz surface-emitting QCL in a single-lobed beam at 59 K , with a maximum operating temperature of 97 K in pulsed-mode. Numerical modeling indicates that the DFB scheme allows for a large variation of the radiative loss by adjusting the slits, and hence may be suitable for different types of QCL active regions.",

author = "Fei Jia and Addamane, \{Sadhvikas J.\} and Reno, \{John L.\} and Sushil Kumar",

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doi = "10.1063/5.0273563",

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volume = "126",

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T1 - High-power 2.2 THz quantum-cascade laser with sixth-order distributed feedback

AU - Jia, Fei

AU - Addamane, Sadhvikas J.

AU - Reno, John L.

AU - Kumar, Sushil

PY - 2025/6/30

Y1 - 2025/6/30

N2 - A distributed-feedback (DFB) scheme with sixth-order Bragg gratings realizes high-power emission for low-frequency single-mode terahertz quantum-cascade lasers (QCLs). The gratings are implemented in top claddings of plasmonic metallic cavities of the QCLs with four appropriately placed radiating slits per period. A peak optical power of 112 mW is detected for a 2.2 THz surface-emitting QCL in a single-lobed beam at 59 K , with a maximum operating temperature of 97 K in pulsed-mode. Numerical modeling indicates that the DFB scheme allows for a large variation of the radiative loss by adjusting the slits, and hence may be suitable for different types of QCL active regions.

AB - A distributed-feedback (DFB) scheme with sixth-order Bragg gratings realizes high-power emission for low-frequency single-mode terahertz quantum-cascade lasers (QCLs). The gratings are implemented in top claddings of plasmonic metallic cavities of the QCLs with four appropriately placed radiating slits per period. A peak optical power of 112 mW is detected for a 2.2 THz surface-emitting QCL in a single-lobed beam at 59 K , with a maximum operating temperature of 97 K in pulsed-mode. Numerical modeling indicates that the DFB scheme allows for a large variation of the radiative loss by adjusting the slits, and hence may be suitable for different types of QCL active regions.

UR - https://www.scopus.com/pages/publications/105009802340

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DO - 10.1063/5.0273563

M3 - Article

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SN - 0003-6951

VL - 126

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

M1 - 261101

ER -

High-power 2.2 THz quantum-cascade laser with sixth-order distributed feedback

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