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APPLIED PHYSICS LETTERS (2022)

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Article Physics, Applied

Relative intensity noise and intrinsic properties of RF mounted interband cascade laser

P. Didier et al.

Summary: The experimental study focuses on the relative intensity noise of a multi-mode interband cascade laser at 4.1 micrometers, showing a relaxation frequency in the GHz range at room temperature. Results indicate that, above threshold current, relaxation frequency increases with bias current, with simulations matching experimental efforts. Fitting of relative intensity noise resonances provides insight into key parameters of the studied interband cascade laser.

APPLIED PHYSICS LETTERS (2021)

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Article Physics, Applied

Mid-infrared quantum cascade laser frequency combs with a microstrip-like line waveguide geometry

Filippos Kapsalidis et al.

Summary: The design of a mid-infrared quantum cascade laser frequency comb source presented in this work enhances device's high frequency response and comb characteristics. The repetition rate frequency can be locked to an injected narrow-linewidth RF signal over a range of more than 200kHz, while maintaining and verifying the coherence of the comb.

APPLIED PHYSICS LETTERS (2021)

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Article Physics, Applied

THz intersubband electroluminescence from n-type Ge/SiGe quantum cascade structures

David Stark et al.

Summary: Electroluminescence from L-valley transitions in n-type Ge/Si0.15Ge0.85 quantum cascade structures has been reported, with two peaks indicating suboptimal injection in the upper state of the radiative transition. The emission efficiency of the Ge/SiGe structure is found to be one order of magnitude lower compared to a similar GaAs/AlGaAs structure.

APPLIED PHYSICS LETTERS (2021)

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Article Physics, Applied

Self-starting harmonic comb emission in THz quantum cascade lasers

Andres Forrer et al.

Summary: Harmonic comb states have been found to be prevalent in mid-IR quantum cascade lasers. This study reports on robust, pure, self-starting harmonic mode locking in Copper-based double-metal THz quantum cascade lasers, which can excite different harmonic orders and show stable harmonic combs spanning over 600GHz. The devices can be RF injected, and the free running coherence is assessed using a self-mixing technique performed at 50GHz.

APPLIED PHYSICS LETTERS (2021)

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Editorial Material Physics, Applied

Ultrawide bandgap semiconductors

Masataka Higashiwaki et al.

APPLIED PHYSICS LETTERS (2021)

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Article Physics, Applied

Double longitudinal-optical phonon intrawell depopulated terahertz quantum cascade structures: Electron transport modeling using a density matrix method

Will Freeman

Summary: Theoretical studies on Terahertz quantum cascade structures using double longitudinal-optical phonon intrawell scattering for depopulation have shown that greater depopulation transitions result in reduced phonon absorption thermal backscatter, enabling higher operating temperatures and potential for room temperature operation above 300K. Results also suggest that improving depopulation transitions can enhance temperature limits in single phonon structures.

APPLIED PHYSICS LETTERS (2021)

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Article Physics, Applied

High responsivity quantum cascade detectors with bound-to-miniband diagonal transition

Kun Li et al.

Summary: The article describes a long-wavelength infrared quantum cascade detector that utilizes a miniband structure to increase absorption strength and electron extraction efficiency, resulting in high responsivities at a wavelength of 10.55 μm.

APPLIED PHYSICS LETTERS (2021)

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Article Physics, Applied

Narrow linewidth characteristics of interband cascade lasers

Yu Deng et al.

APPLIED PHYSICS LETTERS (2020)

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Article Physics, Applied

External cavity terahertz quantum cascade laser with a metamaterial/graphene optoelectronic mirror

Nikita W. Almond et al.

APPLIED PHYSICS LETTERS (2020)

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Article Physics, Applied

How many photons does it take to form an image?

Steven D. Johnson et al.

APPLIED PHYSICS LETTERS (2020)

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Article Physics, Applied

Carrier leakage via interface-roughness scattering bridges gap between theoretical and experimental internal efficiencies of quantum cascade lasers

C. Boyle et al.

APPLIED PHYSICS LETTERS (2020)

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Article Physics, Applied

Room temperature surface emission on large-area photonic crystal quantum cascade lasers

Y. Liang et al.

APPLIED PHYSICS LETTERS (2019)

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Article Physics, Applied

Split-well direct-phonon terahertz quantum cascade lasers

Asaf Albo et al.

APPLIED PHYSICS LETTERS (2019)

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Article Physics, Applied

Thermoelectrically cooled THz quantum cascade laser operating up to 210K

L. Bosco et al.

APPLIED PHYSICS LETTERS (2019)

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Article Physics, Applied

Coherent anti-Stokes Raman microspectroscopy using spectral focusing with glass dispersion

Israel Rocha-Mendoza et al.

APPLIED PHYSICS LETTERS (2008)

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Article Physics, Applied

Real-time terahertz imaging over a standoff distance (>25 meters)

Alan W. M. Lee et al.

APPLIED PHYSICS LETTERS (2006)

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Article Physics, Applied

Continuous-wave operation of terahertz quantum-cascade lasers above liquid-nitrogen temperature

S Kumar et al.

APPLIED PHYSICS LETTERS (2004)

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Article Physics, Applied

Terahertz quantum-cascade laser at λ≈100 μm using metal waveguide for mode confinement

BS Williams et al.

APPLIED PHYSICS LETTERS (2003)

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Article Physics, Applied

3.4-THz quantum cascade laser based on longitudinal-optical-phonon scattering for depopulation

BS Williams et al.

APPLIED PHYSICS LETTERS (2003)

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