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Line-defect photonic crystal terahertz quantum cascade laser

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Line-defect photonic crystal terahertz quantum cascade laser. / Klimont, Adam; Ottomaniello, Andrea; Degl'Innocenti, Riccardo; Masini, Luca; Bianco, Federica; Wu, Yuqing; Shah, Yash D.; Ren, Yuan; Jessop, David; Tredicucci, Alessandro; Beere, Harvey; Ritchie, David.

In: Journal of Applied Physics, Vol. 126, No. 15, 153104, 21.10.2019.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Harvard

Klimont, A, Ottomaniello, A, Degl'Innocenti, R, Masini, L, Bianco, F, Wu, Y, Shah, YD, Ren, Y, Jessop, D, Tredicucci, A, Beere, H & Ritchie, D 2019, 'Line-defect photonic crystal terahertz quantum cascade laser', Journal of Applied Physics, vol. 126, no. 15, 153104. https://doi.org/10.1063/1.5120025

APA

Klimont, A., Ottomaniello, A., Degl'Innocenti, R., Masini, L., Bianco, F., Wu, Y., Shah, Y. D., Ren, Y., Jessop, D., Tredicucci, A., Beere, H., & Ritchie, D. (2019). Line-defect photonic crystal terahertz quantum cascade laser. Journal of Applied Physics, 126(15), [153104]. https://doi.org/10.1063/1.5120025

Vancouver

Klimont A, Ottomaniello A, Degl'Innocenti R, Masini L, Bianco F, Wu Y et al. Line-defect photonic crystal terahertz quantum cascade laser. Journal of Applied Physics. 2019 Oct 21;126(15). 153104. https://doi.org/10.1063/1.5120025

Author

Klimont, Adam ; Ottomaniello, Andrea ; Degl'Innocenti, Riccardo ; Masini, Luca ; Bianco, Federica ; Wu, Yuqing ; Shah, Yash D. ; Ren, Yuan ; Jessop, David ; Tredicucci, Alessandro ; Beere, Harvey ; Ritchie, David. / Line-defect photonic crystal terahertz quantum cascade laser. In: Journal of Applied Physics. 2019 ; Vol. 126, No. 15.

Bibtex

@article{22c0f5937f714ff7acb9a1e3025c4dd1,
title = "Line-defect photonic crystal terahertz quantum cascade laser",
abstract = "The terahertz (THz) quantum cascade laser (QCL) provides a versatile tool in a plethora of applications ranging from spectroscopy to astronomy and communications. In many of these fields, compactness, single mode frequency emission, and low threshold are highly desirable. The proposed approach, based on line defects in a photonic crystal (PhC) matrix, addresses all these features while offering unprecedented capabilities in terms of flexibility, light waveguiding, and emission directionality. Nine line-defect QCLs were realized in a triangular lattice of pillars fabricated in the laser active region (AR), centered around ∼2 THz by tuning the photonic design. A maximal 36% threshold reduction was recorded for these ultraflat dispersion line-defect QCLs in comparison to standard metal-metal QCL. The mode selectivity is an intrinsic property of the chosen fabrication design and has been achieved by lithographically scaling the dimension of the defect pillars and by acting on the PhC parameters in order to match the AR emission bandwidth. The measured line-defect QCLs emitted preferentially in the single frequency mode in the propagation direction throughout the entire dynamic range. An integrated active platform with multiple directional outputs was also fabricated as proof-of-principle to demonstrate the potential of this approach. The presented results pave the way for integrated circuitry operating in the THz regime and for fundamental studies on microcavity lasers.",
author = "Adam Klimont and Andrea Ottomaniello and Riccardo Degl'Innocenti and Luca Masini and Federica Bianco and Yuqing Wu and Shah, {Yash D.} and Yuan Ren and David Jessop and Alessandro Tredicucci and Harvey Beere and David Ritchie",
year = "2019",
month = oct,
day = "21",
doi = "10.1063/1.5120025",
language = "English",
volume = "126",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "AMER INST PHYSICS",
number = "15",

}

RIS

TY - JOUR

T1 - Line-defect photonic crystal terahertz quantum cascade laser

AU - Klimont, Adam

AU - Ottomaniello, Andrea

AU - Degl'Innocenti, Riccardo

AU - Masini, Luca

AU - Bianco, Federica

AU - Wu, Yuqing

AU - Shah, Yash D.

AU - Ren, Yuan

AU - Jessop, David

AU - Tredicucci, Alessandro

AU - Beere, Harvey

AU - Ritchie, David

PY - 2019/10/21

Y1 - 2019/10/21

N2 - The terahertz (THz) quantum cascade laser (QCL) provides a versatile tool in a plethora of applications ranging from spectroscopy to astronomy and communications. In many of these fields, compactness, single mode frequency emission, and low threshold are highly desirable. The proposed approach, based on line defects in a photonic crystal (PhC) matrix, addresses all these features while offering unprecedented capabilities in terms of flexibility, light waveguiding, and emission directionality. Nine line-defect QCLs were realized in a triangular lattice of pillars fabricated in the laser active region (AR), centered around ∼2 THz by tuning the photonic design. A maximal 36% threshold reduction was recorded for these ultraflat dispersion line-defect QCLs in comparison to standard metal-metal QCL. The mode selectivity is an intrinsic property of the chosen fabrication design and has been achieved by lithographically scaling the dimension of the defect pillars and by acting on the PhC parameters in order to match the AR emission bandwidth. The measured line-defect QCLs emitted preferentially in the single frequency mode in the propagation direction throughout the entire dynamic range. An integrated active platform with multiple directional outputs was also fabricated as proof-of-principle to demonstrate the potential of this approach. The presented results pave the way for integrated circuitry operating in the THz regime and for fundamental studies on microcavity lasers.

AB - The terahertz (THz) quantum cascade laser (QCL) provides a versatile tool in a plethora of applications ranging from spectroscopy to astronomy and communications. In many of these fields, compactness, single mode frequency emission, and low threshold are highly desirable. The proposed approach, based on line defects in a photonic crystal (PhC) matrix, addresses all these features while offering unprecedented capabilities in terms of flexibility, light waveguiding, and emission directionality. Nine line-defect QCLs were realized in a triangular lattice of pillars fabricated in the laser active region (AR), centered around ∼2 THz by tuning the photonic design. A maximal 36% threshold reduction was recorded for these ultraflat dispersion line-defect QCLs in comparison to standard metal-metal QCL. The mode selectivity is an intrinsic property of the chosen fabrication design and has been achieved by lithographically scaling the dimension of the defect pillars and by acting on the PhC parameters in order to match the AR emission bandwidth. The measured line-defect QCLs emitted preferentially in the single frequency mode in the propagation direction throughout the entire dynamic range. An integrated active platform with multiple directional outputs was also fabricated as proof-of-principle to demonstrate the potential of this approach. The presented results pave the way for integrated circuitry operating in the THz regime and for fundamental studies on microcavity lasers.

U2 - 10.1063/1.5120025

DO - 10.1063/1.5120025

M3 - Journal article

VL - 126

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 15

M1 - 153104

ER -