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2009•Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physicsRequires access

Design and analysis of high‐performance terahertz quantum cascade lasers

Norihiko Sekine, Iwao Hosako

Open publisher page 4 citations

Abstract

Abstract We propose a new design for a high‐performance terahertz (THz) quantum cascade laser (QCL) and investigate the characteristics of the laser by using rate equation analysis. By comparing the four‐level system in our design with the three‐level system in the conventional THz QCL, it was found that both a lower threshold current and higher slope efficiency can be realized in the former. Furthermore, it was found that the four‐level system has higher operating temperature tolerance. These results are expected to contribute to the development of THz QCLs that can be operated at high temperatures. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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What this paper is about

Abstract We propose a new design for a high‐performance terahertz (THz) quantum cascade laser (QCL) and investigate the characteristics of the laser by using rate equation analysis. By comparing the four‐level system in our design with the three‐level system in the conventional THz QCL, it was found that both a lower threshold current and higher slope efficiency can be realized in the former. Furthermore, it was found that the four‐level system has higher operating temperature tolerance. These results are expected to contribute to the development of THz QCLs that can be operated at high temperatures. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Available abstract

Abstract We propose a new design for a high‐performance terahertz (THz) quantum cascade laser (QCL) and investigate the characteristics of the laser by using rate equation analysis. By comparing the four‐level system in our design with the three‐level system in the conventional THz QCL, it was found that both a lower threshold current and higher slope efficiency can be realized in the former. Furthermore, it was found that the four‐level system has higher operating temperature tolerance. These results are expected to contribute to the development of THz QCLs that can be operated at high temperatures. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Key concepts: Terahertz radiation, Cascade, Quantum cascade laser, Laser, Optoelectronics, Quantum, Photomixing, Materials science

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