stillingsbetegnelse:
PhD position: Long-wavelength Infrared (LWIR) Upconversion Spectroscopy and Imaging

jobbeskrivelse:
Department of Photonics Engineering at the Technical University of Denmark is seeking a candidate for a 3-year PhD position entitled “Long-wavelength infrared (LWIR) upconversion spectroscopy and imaging”. The project aims to extend upconversion techniques from the MIR to longer wavelengths to cover the gab toward the THz range. The project specifically aims at the 5 to 25 µm spectral range. The selected candidate will have his/her work place at the Technical University of Denmark, Risø Campus but will need to collaborate with several external academic partners. The project is part of the ITN “midTECH”. Project description In this project upconversion detection at longer wavelengths will be pursued. One major challenge moving to the longer wavelength range is the limited range of god nonlinear materials, with high transmission at the infrared wavelength, low absorption at the mixing laser wavelength and the ability to phasematch the nonlinear process. Furthermore, due to the dispersion of most materials, the spectral acceptance of these materials are typically too broad to be used directly for spectroscopy. Key activities •Development of upconversion modules for 5-12 µm to NIR wavelengths to be used for imaging and spectroscopy exploiting the very low noise contributions from silicon-based detectors. These modules will be made available for external partners early in the project. •Develop upconversion modules for 5-25 µm. Many LWIR nonlinear crystals are not transparent for shorter wavelengths; however, compared to their NIR counterparts they often have much higher nonlinear coefficient allowing for efficient wavelength conversion using relative short crystals. Using longer wavelength lasers for the mixing process the generated wavelength will be outside the working range of Si-based detectors and thus need InGaAs detectors which have higher intrinsic noise levels or cascaded upconversion processes. The systems can be configured a point detectors, line detectors or imaging detectors depending on the application. Qualifications Candidates should have a master degree preferably in photonics or equivalent. In addition we expect candidates to: •Have good knowledge on solid-state lasers and nonlinear optics •Solid experimental background •Signal acquisition and data processing, i.e. LabVIEW and MatLab •Be fluent in English •Be prepared to work in close collaboration with an internal project team and with external international partners, both private and public institutions •Be willing to supervise master and bachelor students Candidates must be enthusiastic and feel strongly for optics engineering and applications, be able to combine theory with practical and systematic execution, and enjoy sharing your passion with your colleagues. You should have a creative and positive mindset and thrive in an informal and cross-functional environment. Approval and Enrolment The scholarships for the PhD degree are subject to academic approval, and the candidates will be enrolled in one of the general degree programmes of DTU. For information about the general requirements for enrolment and the general planning of the scholarship studies, please see the DTU PhD Guide. We offer We offer an interesting and challenging job in an international environment focusing on education, research, and innovation, which contribute to enhancing the economy and improving social welfare. We strive for academic excellence, collegial respect and freedom tempered by responsibility. The selected candidate will be working in a project team of 5 PhD students and 2 Postdocs in addition to participating senior staff developing different aspects of upconversion based IR detection at DTU Fotonik, Risø campus. Furthermore, the candidate will be part of the 15 PhD students working within the ITN program “midTECH”. Salary and appointment terms Salary and appointment terms are consistent with the current rules for PhD

Arbejdsgiver Navn: Danmarks Tekniske Universitet

Arbejdsgiver telefonnummer: 45252525

Arbejdsgiver faxnummer: 45881799

Job kort beskrivelse:
Undervisning og forskning på universiteter og højere læreranstalter

land: Danmark

region: Hovedstaden

krævede uddannelse: Ikke angivet

Kilde til jobtilbud: AMS, Offentlige arbejdsformidlinger, Danmark