GaN-based bipolar cascade lasers with 25 nm wide quantum wells
Sign Up to like & getrecommendations! Published in 2022 at "Optical and Quantum Electronics"
DOI: 10.1007/s11082-021-03455-0
Abstract: In good agreement with measurements, self-consistent numerical simulations are utilized to analyze internal device physics, performance limitations, and optimization options for a unique laser design with multiple active regions separated by tunnel junctions, featuring surprisingly… read more here.
Keywords: quantum wells; gan based; bipolar cascade; quantum ... See more keywords
Recent Advances of Efficient Design of Terahertz Quantum-Cascade Lasers
Sign Up to like & getrecommendations! Published in 2020 at "Plasmonics"
DOI: 10.1007/s11468-020-01295-4
Abstract: Terahertz (THz) quantum cascade lasers (QCLs) are electrically pumped and heterostructure based semiconductor laser sources with intersubband transitions of electrons in different layers of the quantum wells and barriers. The THz QCLs have high output… read more here.
Keywords: cascade lasers; terahertz; quantum cascade; thz ... See more keywords
Synchronization of quantum cascade lasers with mutual optoelectronic coupling
Sign Up to like & getrecommendations! Published in 2018 at "Chinese Journal of Physics"
DOI: 10.1016/j.cjph.2018.03.021
Abstract: Abstract In this study, the operating conditions to obtain complete synchronization in two quantum cascade lasers with mutual optoelectronic coupling are analyzed. Synchronization properties and the effect of parameter mismatches on synchronization quality are investigated.… read more here.
Keywords: optoelectronic coupling; quantum cascade; lasers mutual; synchronization ... See more keywords
Sensitivity of heterointerfaces on emission wavelength of quantum cascade lasers
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Crystal Growth"
DOI: 10.1016/j.jcrysgro.2016.11.029
Abstract: Abstract The measured emission wavelengths of AlInAs/GaInAs/InP quantum cascade lasers (QCLs) grown by metal organic vapor phase epitaxy (MOVPE) have been reported to be ~ 0.5–1 µm longer than the designed QCL wavelength. This work clarifies… read more here.
Keywords: alinas gainas; emission wavelength; cascade lasers; quantum cascade ... See more keywords
Effects of propagation on the population dynamics of terahertz quantum cascade lasers
Sign Up to like & getrecommendations! Published in 2019 at "Superlattices and Microstructures"
DOI: 10.1016/j.spmi.2019.106315
Abstract: Abstract The spatial and temporal dependence of population dynamics caused by ultrafast π laser pulses are studied by Maxwell-Bloch equations in terahertz quantum cascade lasers with and without propagation effects. It is shown that the… read more here.
Keywords: effects propagation; population dynamics; terahertz quantum; cascade lasers ... See more keywords
Lateral Heterogeneous Integration of Quantum Cascade Lasers
Sign Up to like & getrecommendations! Published in 2018 at "ACS Photonics"
DOI: 10.1021/acsphotonics.8b00507
Abstract: Broadband terahertz radiation potentially has extensive applications, ranging from personal health care to industrial quality control and security screening. While traditional methods for broadband terahertz generation rely on bulky and expensive mode-locked lasers, frequency combs… read more here.
Keywords: lateral heterogeneous; gain; heterogeneous integration; cascade lasers ... See more keywords
Beam shaping in high-power broad-area quantum cascade lasers using optical feedback
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/srep44284
Abstract: Broad-area quantum cascade lasers with high output powers are highly desirable sources for various applications including infrared countermeasures. However, such structures suffer from strongly deteriorated beam quality due to multimode behavior, diffraction of light and… read more here.
Keywords: feedback; broad area; optical feedback; cascade lasers ... See more keywords
InAs‐based quantum cascade lasers emitting close to 25 µm
Sign Up to like & getrecommendations! Published in 2019 at "Electronics Letters"
DOI: 10.1049/el.2018.6413
Abstract: Indium arsenide (InAs)-based quantum cascade lasers (QCLs) operating close to 25 µm are reported. Thick n-doped InAs cladding layers were used for optical confinement. Fabry–Perot lasers exhibited a threshold current density as low as 1.1… read more here.
Keywords: based quantum; threshold current; quantum cascade; cascade lasers ... See more keywords
Distributed loss method to suppress high order modes in broad area quantum cascade lasers
Sign Up to like & getrecommendations! Published in 2017 at "Applied Physics Letters"
DOI: 10.1063/1.5006042
Abstract: We describe a method where the standard fabrication of broad area quantum cascade lasers is modified to provide a controlled amount of direct contact of device sidewalls with metal. We demonstrate that this provides sufficient… read more here.
Keywords: area quantum; quantum; broad area; cascade lasers ... See more keywords
Distributed feedback interband cascade lasers with top grating and corrugated sidewalls
Sign Up to like & getrecommendations! Published in 2018 at "Applied Physics Letters"
DOI: 10.1063/1.5009741
Abstract: Distributed feedback (DFB) interband cascade lasers (ICLs) with a 1st order top surface grating were designed and fabricated. Partially corrugated sidewalls were implemented to suppress high order lateral modes. The DFB ICLs have 4 mm long… read more here.
Keywords: interband cascade; cascade lasers; corrugated sidewalls; distributed feedback ... See more keywords
Intrinsic frequency Tuning of terahertz Quantum-cascade lasers
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Applied Physics"
DOI: 10.1063/1.5024480
Abstract: We have studied the intrinsic frequency tuning of several terahertz (THz) quantum-cascade lasers (QCLs) based on a hybrid design. With increasing driving current, most QCLs exhibit either a redshift or a blueshift, while some QCLs… read more here.
Keywords: tuning terahertz; cascade lasers; intrinsic frequency; quantum cascade ... See more keywords