Quantum cascade laser thesis

The project presented in this thesis is an application of THz quantum cascade laser. The project is focused on development of a local oscillator LO system aimed to be used in Earth observation. A single mode THz QCL which produces continuous-wave signals is designed, fabricated and characterized. In order to improve the performance of the LO THz QCLit is integrated within a waveguide block, which is more mechanically robust than a normal packed QCL and a significant improvement in beam profile was obtained by the integration with little change in the electrical and thermal performance.

Quantum cascade laser thesis

Main content Spark Award: ERC consolidator grant for Giacomo Scalari Giacomo Scalari will use his ERC Consolidator Grant to create on-chip, self-referenced frequency combs operating in the THz spectral range, where there is currently no compact comb source available.

These devices will be appealing for metrology and material inspection, non-invasive imaging for medical applications, and wireless communication. Two THz QCLs were processed next to each other by dry-etching techniques on the same chip and connected individually to two current sources.

The full text Markus Roesch et al.

Quantum cascade laser thesis

We use quantum-cascade-laser frequency combs to demonstrate a high resolution, broadband dual-comb spectrometer. This article demonstrates the potential of this novel technology. It concludes with the vision of a monolithically integrated mid-infrared dual-comb spectrometer featuring ultra-high sensitivity and selectivity.

IRsweep will deliver this technology in an industry ready system. Dual-comb spectroscopy based on quantum-cascade-laser frequency combs Gustavo Villares et al.

The full review here Pierre Jouy et al. Pierre Jouy et al. They platform enabled the detection of CO2 isotopes ratio down to 0. The European Research Council had to choose the best from no less than 2, projects.

In his project, he wants to develop new quantum structures using micro and nano-production technology. It involves a kind of chimera of quantum mechanics: The project aims to enable quantum-optical experiments in the terahertz spectral range and to predict and investigate advanced states of graphene.

The QCL will turn 20 years in This will be celebrated with an anniversary workshop in Zurich on Distinguished invited speakers will present achievements and future perspectives for devices and their applications.

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The recent realisation of an elecrically pumped mid-infrared frequency comb using a quantum cascade laser in the Faist group is published in Nature today.

The full article is available here. This work is very relevant for spectroscopy as many small characteistic vibrational-rotational resonances of small molecules are found in this frequency range. Swiss Quantum Science Competence Center Find out more about this exciting field of research at the Center's website and in this video:Optical Dielectric Nanoantenna for Quantum Cascade Laser Device Directive Emission A Thesis Presented by Jing Wu to The Department of Electrical and Computer Engineering for the degree of Quantum cascade lasers (QCLs) are semiconductor lasers that emit in the mid-to.

In this thesis, operation of a THz quantum cascade laser (QCL) was successfully achieved using a closed cycle cryostat and nanosecond pulse generator with impedance matching circuitry. The laser beam was imaged in real time using an uncooled microbolometer infrared camera typically used in far-infrared wavelength band ( mm).

mid-infrared quantum cascade laser a thesis submitted to the graduate school of engineering and science of bilkent university in partial fulfillment of the requirements for the degree of master of science in electrical and electronics engineering by berkay bozok may ii.

This thesis is concerned with the design, fabrication and characterisation of monolithic tuneable quantum cascade lasers (QCLs), which are suitable for tuneable diode laser based absorption spectroscopy and polarisation dependent spectroscopy in the mid-infrared wavelength range.

This thesis aimed on characterizing a quantum cascade laser (QCL) beam and achieving high quality real-time THz imaging using a x pixel FLIR A20M microbolometer camera designed to operate in long wave infrared range.

Multicomponent Gas Analysis using Broadband Quantum Cascade Laser Spectroscopy We present a broadband quantum cascade laser-based spectroscopic system covering the region between and cm Its robust multipass cavity ensures a constant interaction length .

CandidateProject: THz metamaterial quantum cascade lasers