Long-wavelength (λ≈16 μm), room-temperature, single-frequency quantum-cascade lasers based on a bound-to-continuum transition

Rochat, Michel; Hofstetter, Daniel; Beck, Mattias; Faist, Jérôme

doi:10.1063/1.1425468

Cited by 56 publications

(27 citation statements)

References 10 publications

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“…However, the modified In contents introduce strain between the barrier and QW layers and the InP substrate; since the strains are of opposite signs, namely tensile in the barrier and compressive in the QW, a strain compensated pseudomorphic active region can be obtained by choosing appropriate layer thicknesses and material compositions. Using strained In Ga As-In Al As with a CBO of 610 meV [25], a QCD (N1037) with a peak detection energy of 319 meV (3.88 m) is presented [26]. N1037's active region is described in Table II.…”

Section: B Near-infrared Qcdsmentioning

confidence: 99%

Quantum Cascade Detectors

Giorgetta

Baumann

Graf

et al. 2009

IEEE J. Quantum Electron.

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126

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Abstract-This paper gives an overview on the design, fabrication, and characterization of quantum cascade detectors. They are tailorable infrared photodetectors based on intersubband transitions in semiconductor quantum wells that do not require an external bias voltage due to their asymmetric conduction band profile. They thus profit from favorable noise behavior, reduced thermal load, and simpler readout circuits. This was demonstrated at wavelengths from the near infrared at 2 m to THz radiation at 87 m using different semiconductor material systems. In the NIR, fast intraband semiconductor photodetectors are only available for wavelengths up to about 1.6 m. On the other tail of optical frequencies, namely for detection of THz radiation, bolometers are widely used; however, they are not well suited for high-speed applications. For fast light detection at wavelengths above 1.6 m, ISB photodetectors are very promising candidates. As unipolar devices, their fundamental F. R. Giorgetta was with the University of Neuchatel, 2000 Neuchatel, Switzerland. He is now with the National

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Section: B Near-infrared Qcdsmentioning

confidence: 99%

Quantum Cascade Detectors

Giorgetta

Baumann

Graf

et al. 2009

IEEE J. Quantum Electron.

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200

126

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“…10. InGaAs contact facilitating layers, Si-doped at 2 ϫ 10 18 cm −3 , of 50 nm and 200 nm thicknesses were grown above and below the AR, respectively.…”

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confidence: 99%

Vertical subwavelength mode confinement in terahertz and mid-infrared quantum cascade lasers

Strupiechonski

Grassani

Fowler

et al. 2011

Applied Physics Letters

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We exploit the modal confinement properties of metal-metal ridge waveguides to investigate the effect of reducing the thickness of the active laser cores in both terahertz and mid-infrared quantum cascade lasers. Devices with active regions over 55 times thinner than the free-space emission wavelength are demonstrated. They show only a modest increase in threshold current density compared with conventional-thickness devices. The limited increase in threshold is possibly due to a parasitic current channel in addition to the radiative current channel. These structures could be useful for the development of ultra-low volume lasers.

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“…11 At present, wavelengths as long as λ=16 µm have been demonstrated in pulsed mode at room temperature. 12 Significant development of the room temperature performance later led to demonstrations of 1W total power output at λ=11 µm and 7W total output at λ=9 µm. [ 13 , 14 ] At λ=9 µm, approximately 300 mW of total average power output power at room temperature was also demonstrated.…”

Section: Longwave-infrared Laser Resultsmentioning

confidence: 99%

High power, continuous-wave, quantum cascade lasers for MWIR and LWIR applications

Slivken¹,

Evans²,

Yu³

et al. 2006

SPIE Proceedings

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Over the past several years, our group has endeavored to develop high power quantum cascade lasers for a variety of remote and high sensitivity infrared applications. The systematic optimization of laser performance has allowed for demonstration of high power, continuous-wave quantum cascade lasers operating above room temperature. Since 2002, the power levels for individual devices have jumped from <20 mW to >600 mW. Expanding on this development, we have able to demonstrate continuous wave operation at many wavelengths throughout the mid-and far-infrared spectral range, and have now achieved >100 mW output in the 4.0< λ<9.5 µm range.

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Long-wavelength (λ≈16 μm), room-temperature, single-frequency quantum-cascade lasers based on a bound-to-continuum transition

Abstract: Published by the AIP Publishing Articles you may be interested inAbove room temperature operation of short wavelength ( λ = 3.8 μ m ) strain-compensated In 0.73 Ga 0.27 As -AlAs quantum-cascade lasers

Cited by 56 publications

References 10 publications

Quantum Cascade Detectors

Quantum Cascade Detectors

Vertical subwavelength mode confinement in terahertz and mid-infrared quantum cascade lasers

High power, continuous-wave, quantum cascade lasers for MWIR and LWIR applications

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