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Terahertz Quantum Cascade Lasers
Asia Optical Fiber Communication and Optoelectronic Exposition and Conference, 2007Six years after their birth, terahertz quantum-cascade lasers can now deliver milliwatts or more of continuous-wave coherent radiation throughout the terahertz range — the spectral regime between millimetre and infrared wavelengths, which has long resisted development.
Benjamin S. Williams
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Terahertz Quantum Cascade Lasers
SPIE Proceedings, 2003Unipolar semiconductor injection lasers emitting at THz frequencies (from 4.3 THz down to 2.8 THz) are discussed. The devices are based on interminiband transitions in chirped GaAs/AlGaAs superlattices that are arranged in a quantum-cascade scheme. The core, featuring about 100 repetitions of this type of superlattice, is embedded into a novel kind of ...
R. Köhler +6 more
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Physics Today, 1999
Band-structure engineering has led to a fundamentally new laser with applications ranging from highly sensitive trace-gas analysis to communications.
Federico Capasso +3 more
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Band-structure engineering has led to a fundamentally new laser with applications ranging from highly sensitive trace-gas analysis to communications.
Federico Capasso +3 more
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Science, 1994
A semiconductor injection laser that differs in a fundamental way from diode lasers has been demonstrated. It is built out of quantum semiconductor structures that were grown by molecular beam epitaxy and designed by band structure engineering. Electrons streaming down a potential staircase sequentially emit photons at the steps.
J, Faist +5 more
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A semiconductor injection laser that differs in a fundamental way from diode lasers has been demonstrated. It is built out of quantum semiconductor structures that were grown by molecular beam epitaxy and designed by band structure engineering. Electrons streaming down a potential staircase sequentially emit photons at the steps.
J, Faist +5 more
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Quantum Optoelectronics, 1995
The recently demonstrated quantum cascade laser is a fundamentally new semiconductor laser.1-3 It relies on only one type of carrier (unipolar laser) and on quantum jumps of electrons between discrete conduction band energy levels of quantum wells. As such the wavelength can be tailored over a very wide range from the mid-ir (a few microns) to the far ...
F. Capasso, J. Faist
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The recently demonstrated quantum cascade laser is a fundamentally new semiconductor laser.1-3 It relies on only one type of carrier (unipolar laser) and on quantum jumps of electrons between discrete conduction band energy levels of quantum wells. As such the wavelength can be tailored over a very wide range from the mid-ir (a few microns) to the far ...
F. Capasso, J. Faist
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2022
Quantum Cascade Lasers (QCLs) represent a significant advancement in laser technology, enabling a broad range of applications due to their unique operational principles. Unlike traditional semiconductor lasers that rely on inter-band transitions, QCLs use intersubband transitions within quantum wells, allowing for emission in the mid-infrared and ...
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Quantum Cascade Lasers (QCLs) represent a significant advancement in laser technology, enabling a broad range of applications due to their unique operational principles. Unlike traditional semiconductor lasers that rely on inter-band transitions, QCLs use intersubband transitions within quantum wells, allowing for emission in the mid-infrared and ...
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Conference on Lasers and Electro-Optics-Europe, 1998
By controlling the quantum well widths and the tunnelling barrier thickness of heterostructures it is possible to create artificial potentials where level separations, dipole matrix elements, lifetimes and scattering times are dependent on the potential design.
C. Sirtori +4 more
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By controlling the quantum well widths and the tunnelling barrier thickness of heterostructures it is possible to create artificial potentials where level separations, dipole matrix elements, lifetimes and scattering times are dependent on the potential design.
C. Sirtori +4 more
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2009
As a result of mass production, millions of semiconductor diode lasers are manufactured each month and appear in products ranging from telecommunications transmitters to DVD players and laser pointers. For traditional laser diodes, the applications are often dictated by what part of the electromagnetic spectrum is accessible.
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As a result of mass production, millions of semiconductor diode lasers are manufactured each month and appear in products ranging from telecommunications transmitters to DVD players and laser pointers. For traditional laser diodes, the applications are often dictated by what part of the electromagnetic spectrum is accessible.
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Chemical & Engineering News Archive, 2010
In this chapter we shall discuss basic features of quantum-cascade coherent-light sources; to this aim we shall review a few simulated experiments focusing on the microscopic explanation of the gain regime, both in the mid-infrared and in the far-infrared spectral regions.
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In this chapter we shall discuss basic features of quantum-cascade coherent-light sources; to this aim we shall review a few simulated experiments focusing on the microscopic explanation of the gain regime, both in the mid-infrared and in the far-infrared spectral regions.
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Cascaded-transition Quantum Cascade laser
2012 Lester Eastman Conference on High Performance Devices (LEC), 2012The Quantum Cascade (QC) laser is a semiconductor laser based on intersubband transitions in the conduction band of a multiple quantum-well heterostructure, and is a highperformance light source in the mid-infrared and terahertz region. With the aim of improving the quantum efficiency and power efficiency of long-wavelength QC lasers, based on the ...
Jingyuan Linda Zhang +4 more
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