Recent advances of terahertz quantum cascade lasers

Manijeh Razeghi

doi:10.1117/12.899131

Recent advances of terahertz quantum cascade lasers

Manijeh Razeghi^*

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In the past decade, tremendous development has been made in GaAs/AlGaAs based THz quantum cascade laser (QCLs), however, the maximum operating temperature is still limited below 200 K (without magnetic field). THz QCL based on difference frequency generation (DFG) represents a viable technology for room temperature operation. Recently, we have demonstrated room temperature THz emission (∼ 4 THz) up to 8.5 μW with a power conversion efficiency of 10 μW/W₂. A dual-period distributed feedback grating is used to filter the mid-infrared spectra in favor of an extremely narrow THz linewidth of 6.6 GHz.

Original language	English (US)
Title of host publication	Terahertz Emitters, Receivers, and Applications II
Volume	8119
DOIs	https://doi.org/10.1117/12.899131
State	Published - Oct 11 2011
Event	Terahertz Emitters, Receivers, and Applications II - San Diego, CA, United States Duration: Aug 21 2011 → Aug 21 2011

Other

Other	Terahertz Emitters, Receivers, and Applications II
Country	United States
City	San Diego, CA
Period	8/21/11 → 8/21/11

Keywords

Difference frequency generation
III-nitride
Quantum cascade lasers
Terahertz

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

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10.1117/12.899131

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title = "Recent advances of terahertz quantum cascade lasers",

abstract = "In the past decade, tremendous development has been made in GaAs/AlGaAs based THz quantum cascade laser (QCLs), however, the maximum operating temperature is still limited below 200 K (without magnetic field). THz QCL based on difference frequency generation (DFG) represents a viable technology for room temperature operation. Recently, we have demonstrated room temperature THz emission (∼ 4 THz) up to 8.5 μW with a power conversion efficiency of 10 μW/W2. A dual-period distributed feedback grating is used to filter the mid-infrared spectra in favor of an extremely narrow THz linewidth of 6.6 GHz.",

keywords = "Difference frequency generation, III-nitride, Quantum cascade lasers, Terahertz",

author = "Manijeh Razeghi",

year = "2011",

month = oct,

day = "11",

doi = "10.1117/12.899131",

language = "English (US)",

isbn = "9780819487292",

volume = "8119",

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N2 - In the past decade, tremendous development has been made in GaAs/AlGaAs based THz quantum cascade laser (QCLs), however, the maximum operating temperature is still limited below 200 K (without magnetic field). THz QCL based on difference frequency generation (DFG) represents a viable technology for room temperature operation. Recently, we have demonstrated room temperature THz emission (∼ 4 THz) up to 8.5 μW with a power conversion efficiency of 10 μW/W2. A dual-period distributed feedback grating is used to filter the mid-infrared spectra in favor of an extremely narrow THz linewidth of 6.6 GHz.

AB - In the past decade, tremendous development has been made in GaAs/AlGaAs based THz quantum cascade laser (QCLs), however, the maximum operating temperature is still limited below 200 K (without magnetic field). THz QCL based on difference frequency generation (DFG) represents a viable technology for room temperature operation. Recently, we have demonstrated room temperature THz emission (∼ 4 THz) up to 8.5 μW with a power conversion efficiency of 10 μW/W2. A dual-period distributed feedback grating is used to filter the mid-infrared spectra in favor of an extremely narrow THz linewidth of 6.6 GHz.

KW - Difference frequency generation

KW - III-nitride

KW - Quantum cascade lasers

KW - Terahertz

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BT - Terahertz Emitters, Receivers, and Applications II

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