[PDF] Top 20 Coherent imaging and sensing using the self-mixing effect in THz quantum cascade lasers
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Coherent imaging and sensing using the self-mixing effect in THz quantum cascade lasers
... Coherent imaging and sensing using the self-mixing effect in THz quantum cascade lasers Paul Dean, James Keeley, Alex Valavanis, Raed Alhathlool, Suraj P.. Khanna, Mohammad Lachab, Draga[r] ... See full document
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Origin of terminal voltage variations due to self mixing in terahertz frequency quantum cascade lasers
... Quantum cascade lasers (QCLs) are compact semiconductor sources of terahertz (THz) frequency radiation that are capable of emission powers of up to 1 W [1] and maximum operating temperatures ... See full document
10
Temperature Dependent High Speed Dynamics of Terahertz Quantum Cascade Lasers
... of THz QCLs is vital for understanding the more complex behaviors of these devices and thus for the development of new applications—more so, con- sidering that laboratory investigation of such behavior can be ... See full document
9
Terahertz inverse synthetic aperture radar imaging using self-mixing interferometry with a quantum cascade laser
... a THz synthetic aperture imag- ing technique based on SM ...21–23 Using the SM effect, we demonstrate a THz SAR built around a directly modulated ...to coherent detection ... See full document
5
Terahertz imaging using quantum cascade lasers — a review of systems and applications
... of imaging using THz QCL sources [44–46] adopted incoherent thermal detection, thereby foregoing the advantages of coherent detection offered by TPI ...peak THz power of 4 mW, despite ... See full document
22
Terahertz sensing and imaging using a quantum cascade laser
... frequency imaging and sensing using a single quantum cascade laser (QCL) device for both generation and sensing of THz ...the effect of self-mixing in ... See full document
5
Origin of terminal voltage variations due to self-mixing in terahertz frequency quantum cascade lasers
... Quantum cascade lasers (QCLs) are compact semiconductor sources of terahertz (THz) frequency radiation that are capable of emission powers of up to 1 W [1] and maximum operating temperatures ... See full document
9
Optical feedback effects on terahertz quantum cascade lasers: modelling and applications
... (THz) quantum cascade lasers (QCLs) are compact sources of radiation in the 1–5 THz range with significant potential for applications in sensing and ...with THz QCLs is a ... See full document
14
Continuous-wave coherent imaging with terahertz quantum cascade lasers using electro-optic harmonic sampling
... this effect could suddenly drive the QCL out of lock, thus compromising the image acquisi- ...the effect of this feedback we inserted an opti- cal isolator, consisting of a wire-grid polarizer (WGP) ... See full document
5
Coherent three-dimensional terahertz imaging through self-mixing in a quantum cascade laser
... characterised using a non-contact optical profilometer (Bruker NPFLEX 3D), the results of which are included in ...the THz depth profiles obtained for both ... See full document
5
Coherent imaging using laser feedback interferometry with pulsed-mode terahertz quantum cascade lasers
... a coherent sensing scheme that employs a laser as a homodyne ...SM effect — the sensitivity of a coherent source to its emitted electromagnetic field that interacts with the environment ... See full document
13
Switching circuit to improve the frequency modulation difference-intensity THz quantum cascade laser imaging
... Figure 2 shows oscilloscope traces of the low-amplitude and high-amplitude voltage pulses delivered to the QCL, and the corresponding current pulses obtained using the switching circuit at various frequencies of ... See full document
5
Discrete Vernier tuning in terahertz quantum cascade lasers using coupled cavities
... Terahertz-frequency quantum cascade lasers (THz QCLs) are compact solid-state sources of coherent radiation in the 1–5 THz region of the electromagnetic spectrum [1], with output ... See full document
11
Towards automated design of quantum cascade lasers
... The form of the optimization target function differs slightly depending on the active region shape. In the case of the triple step-quantum-well active region this is chosen so to enable the selection of potential ... See full document
8
Investigation of thermal effects in quantum-cascade lasers
... calculated using a self-consistent scattering rate model and then inserted into the developed thermal model to investigate the influence of various driving conditions and device geometry on the QCL active ... See full document
10
Self-consistent scattering theory of transport and output characteristics of quantum cascade lasers
... Although the proposed model is quite general and appli- cable to different cascade structures, the original GaAs/Al 0.33 Ga 0.67 As structure described in Ref. 5 was ana- lyzed. The main reason was the fact that a ... See full document
9
Resonant−phonon depopulation terahertz quantum cascade lasers and their application in spectroscopic imaging
... of THz QCL devices greatly improves their applicability across a range of areas, particularly applications in spectroscopic analysis, including gas ...~4.0 THz, ~3.4 THz, ~3.1 THz and ...ridge ... See full document
20
Self-consistent energy balance simulations of hole dynamics in SiGe/Si THz quantum cascade structures
... the self-consistent energy-balance (SCEB) model, is a set of 2N nonlinear equations in N values of densities and N ...iteratively, using the Broyden ...tained using simple bisection for the ... See full document
10
Efficient method for transport simulations in quantum cascade lasers
... the quantum state of each module b and every reservoir of electrons in active device, taking into account the considered scattering effects, are ...the self-energy matrix $ ... See full document
6
Thermal effects in InGaAs/AlAsSb quantum-cascade lasers
... used in the simulations and the results presented in Fig. 4. A constant etch depth of 9 µm is used in Fig. 4(a), and a ridge width of 10 µm used in Fig. 4(b). The results in the Fig. 4(a) agree with experimental ... See full document
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