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Terahertz quantum cascade lasers with >1 W output powers
Terahertz (THz) frequency quantum cascade lasers emitting peak powers of >1 W from a single facet in the pulsed mode are demonstrated. The active region is based on a bound-to-continuum transitionExpand
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Terahertz imaging through self-mixing in a quantum cascade laser.
We demonstrate terahertz (THz) frequency imaging using a single quantum cascade laser (QCL) device for both generation and sensing of THz radiation. Detection is achieved by utilizing the effect ofExpand
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Terahertz imaging using quantum cascade lasers: a review of systems and applications
The terahertz (THz) frequency quantum cascade laser (QCL) is a compact source of THz radiation offering high power, high spectral purity and moderate tunability. As such, these sources areExpand
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Origin of terminal voltage variations due to self-mixing in terahertz frequency quantum cascade lasers.
We explain the origin of voltage variations due to self-mixing in a terahertz (THz) frequency quantum cascade laser (QCL) using an extended density matrix (DM) approach. Our DM model allowsExpand
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Swept-frequency feedback interferometry using terahertz frequency QCLs: a method for imaging and materials analysis.
The terahertz (THz) frequency quantum cascade laser (QCL) is a compact source of high-power radiation with a narrow intrinsic linewidth. As such, THz QCLs are extremely promising sources forExpand
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Demonstration of a self-mixing displacement sensor based on terahertz quantum cascade lasers
There has been growing interest in the use of terahertz (THz) quantum cascade lasers (QCLs) for sensing applications. However, the lack of compact and sensitive THz detectors has limited theExpand
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Coherent three-dimensional terahertz imaging through self-mixing in a quantum cascade laser
We demonstrate coherent terahertz (THz) frequency imaging using the self-mixing effect in a quantum cascade laser (QCL). Self-mixing voltage waveforms are acquired at each pixel of a two-dimensionalExpand
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Self-Mixing Interferometry With Terahertz Quantum Cascade Lasers
Terahertz frequency quantum cascade lasers (THz QCLs) are compact sources of coherent THz radiation with potential applications that include astronomy, trace-gas sensing, and security imaging.Expand
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Absorption-sensitive diffuse reflection imaging of concealed powders using a terahertz quantum cascade laser.
We report diffuse reflection imaging in air of concealed powdered samples using a terahertz quantum cascade laser. The sensitivity of the detection scheme to sub-surface absorption within samples isExpand
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Apertureless near-field terahertz imaging using the self-mixing effect in a quantum cascade laser
We report two-dimensional apertureless near-field terahertz (THz) imaging using a quantum cascade laser(QCL)source and a scattering probe. A near-field enhancement of the scattered field amplitude isExpand
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