Search Results - "Kirch, J. D"

Measurements of the Thermal Resistivity of InAlAs, InGaAs, and InAlAs/InGaAs Superlattices by Jaffe, G. R, Mei, S, Boyle, C, Kirch, J. D, Savage, D. E, Botez, D, Mawst, L. J, Knezevic, I, Lagally, M. G, Eriksson, M. A

“…Thermal management efforts in nanoscale devices must consider both the thermal properties of the constituent materials and the interfaces connecting them. It…”
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Highly efficient ∼8 μm-emitting, step-taper active-region quantum cascade lasers by Oresick, K. M., Kirch, J. D., Mawst, L. J., Botez, D.

“…Recently, it was shown for 4.5 μm–5.0 μm-emitting, state-of-the-art quantum cascade lasers (QCLs) that the internal efficiency can be fully accounted for when…”
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InGaAs/AlInAs strain-compensated Superlattices grown on metamorphic buffer layers for low-strain, 3.6μm-emitting quantum-cascade-laser active regions by Mawst, L.J., Kirch, J.D., Chang, C.-C., Kim, T., Garrod, T., Botez, D., Ruder, S., Kuech, T.F., Earles, T., Tatavarti, R., Pan, N., Wibowo, A.

“…Short-wavelength (λ∼3.6μm) quantum-cascade-laser (QCL) designs, employing a metamorphic buffer layer (MBL) on a GaAs substrate, have been developed for strong…”
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Analysis of interface roughness in strained InGaAs/AlInAs quantum cascade laser structures (λ ∼ 4.6 μm) by atom probe tomography by Knipfer, B., Xu, S., Kirch, J.D., Botez, D., Mawst, L.J.

“…•Full QCL structure emitting at λ ∼ 4.55um with strained layers analyzed via APT.•Highest strain interface (5.1% strain differential) showed 50% greater…”
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Carrier leakage via interface-roughness scattering bridges gap between theoretical and experimental internal efficiencies of quantum cascade lasers by Boyle, C., Oresick, K. M., Kirch, J. D., Flores, Y. V., Mawst, L. J., Botez, D.

“…When conventionally calculating carrier leakage for state-of-the-art quantum cascade lasers (QCLs), that is, LO-phonon-assisted leakage from the upper laser…”
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8.1 μm-emitting InP-based quantum cascade laser grown on Si by metalorganic chemical vapor deposition by Xu, S., Zhang, S., Kirch, J. D., Gao, H., Wang, Y., Lee, M. L., Tatavarti, S. R., Botez, D., Mawst, L. J.

“…This study presents the growth and characterization of an 8.1 μm-emitting, InGaAs/AlInAs/InP-based quantum cascade laser (QCL) formed on an InP-on-Si composite…”
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5.5 W near-diffraction-limited power from resonant leaky-wave coupled phase-locked arrays of quantum cascade lasers by Kirch, J. D., Chang, C.-C., Boyle, C., Mawst, L. J., Lindberg, D., Earles, T., Botez, D.

“…Five, 8.36 μm-emitting quantum-cascade lasers (QCLs) have been monolithically phase-locked in the in-phase array mode via resonant leaky-wave coupling. The…”
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8.5 μm-emitting InP-based quantum cascade lasers grown on GaAs by metal-organic chemical vapor deposition by Xu, S., Zhang, S., Kirch, J. D., Suri, S., Pokharel, N., Gao, H., Kim, H., Dhingra, P., Lee, M. L., Botez, D., Mawst, L. J.

“…Room-temperature, pulsed-operation lasing of 8.5 μm-emitting InP-based quantum cascade lasers (QCLs), with low threshold-current density and watt-level output…”
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High-power, surface-emitting quantum cascade laser operating in a symmetric grating mode by Boyle, C., Sigler, C., Kirch, J. D., Lindberg, D. F., Earles, T., Botez, D., Mawst, L. J.

“…Grating-coupled surface-emitting (GCSE) lasers generally operate with a double-lobed far-field beam pattern along the cavity-length direction, which is a…”
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Design for high-power, single-lobe, grating-surface-emitting quantum cascade lasers enabled by plasmon-enhanced absorption of antisymmetric modes by Sigler, C., Kirch, J. D., Earles, T., Mawst, L. J., Yu, Z., Botez, D.

“…Resonant coupling of the transverse-magnetic polarized (guided) optical mode of a quantum-cascade laser (QCL) to the antisymmetric surface-plasmon modes of…”
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Erratum: “Carrier leakage via interface-roughness scattering bridges gap between theoretical and experimental internal efficiencies of quantum cascade lasers” [Appl. Phys. Lett. 117, 051101 (2020)] by Boyle, C., Oresick, K. M., Kirch, J. D., Flores, Y. V., Mawst, L. J., Botez, D.

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Extended wavelength mid-infrared photoluminescence from type-I InAsN and InGaAsN dilute nitride quantum wells grown on InP by Wheatley, R., Kesaria, M., Mawst, L. J., Kirch, J. D., Kuech, T. F., Marshall, A., Zhuang, Q. D., Krier, A.

“…Extended wavelength photoluminescence emission within the technologically important 2–5 μm spectral range has been demonstrated from InAs1−xNx and…”
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Optimization of a quantum cascade laser cavity for single-spatial-mode operation via machine learning by Jacobs, S. A., Kirch, J. D., Hu, Y., Suri, S., Knipfer, B., Yu, Z., Botez, D., Marsland, R., Mawst, L. J.

“…Neural networks, trained with the ADAM algorithm followed by a globally convergent modification to Newton’s method, are developed to predict the threshold gain…”
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Proton implantation for electrical insulation of the InGaAs/InAlAs superlattice material used in 8–15 μm-emitting quantum cascade lasers by Kirch, J. D., Kim, H., Boyle, C., Chang, C.-C., Mawst, L. J., Lindberg, D., Earles, T., Botez, D., Helm, M., von Borany, J., Akhmadaliev, S., Böttger, R., Reyner, C.

“…We demonstrate the conversion of lattice-matched InGaAs/InAlAs quantum-cascade-laser (QCL) active-region material into an effective current-blocking layer via…”
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Layer-thickness dependence of the compositions in strained III–V superlattices by atom probe tomography by Knipfer, B., Rajeev, A., Isheim, D., Kirch, J.D., Babcock, S.E., Kuech, T.F., Earles, T., Botez, D., Mawst, L.J.

“…•Lower Al incorporation in InAlAs and InGaAs was found in thin (<2 nm) strained layers.•A full QCL structure was analyzed via APT to investigate solid-state…”
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Active-Region Design of Mid-Infrared Quantum Cascade Lasers via Machine Learning by Hu, Y., Suri, S., Kirch, J. D., Knipfer, B., Jacobs, S., Nair, S. K., Zhou, Z., Yu, Z., Botez, D., Mawst, L. J.

“…We present a machine-learning (ML) approach for designing the active regions (ARs) of mid-infrared (IR) quantum cascade lasers (QCLs). This complex process,…”
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Inverse Design of Mid-IR Quantum Cascade Lasers by Hu, Y., Suri, S., Kirch, J. D., Knipfer, B., Yu, Z., Botez, D., Mawst, L. J.

“…The active core (AC) of a quantum cascade laser (QCL) is a superlattice with hundreds of layers, which embodies stages consisting of 10-12 quantum wells…”
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High-Power Mid-Infrared Quantum Cascade Lasers for Free-Space Communications by Turville-Heitz, M., Ryu, J., Kirch, J. D., Jacobs, S., Marsland, R., Earles, T., Ruder, S., Oresick, K., Botez, D., Mawst, L. J.

“…Given the ever-growing need for high-data rate, low-latency, secure, wireless communications driven by applications ranging from vehicle automation to ad-hoc…”
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Machine-Learning Based Quantum Cascade Laser Design by Suri, S., Mao, Y., Kirch, J. D., Knipfer, B., Yu, Z., Botez, D., Mawst, L. J.

“…Conventional methods for QCL design rely on optimization of the active-core layer thicknesses and compositions to achieve desired electron wavefunctions and…”
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Fabrication-Tolerant-Design for Single-Lobe, Surface-Emitting Quantum Cascade Lasers by Ryu, J., Sigler, C., Kirch, J. D., Earles, T., Botez, D., Mawst, L. J.

“…Grating-coupled, surface-emitting (GCSE) quantum-cascade lasers (QCLs) are attractive sources for realizing watt-range continuous-wave (CW) output powers in…”
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