stillingsbetegnelse: PhD scholarship in Nonlinear Integrated Photonics

jobbeskrivelse:
DTU Fotonik works with all areas of photonic engineering, including a strong focus on optical communication. The group is offering a position which recently has been showed in the world most efficient nonlinear integrated photonics platform by using AlGaAs on insulator which was presented as post-deadline papers at leading conferences (Pu et al. OFC & CLEO US 2015). This material is two-photon absorption free, but for very high powers three-photon absorption will lower the performance of the platform. We are now seeking a new PhD student to continue this work and especially to look into other alternative material platforms (on silicon substrates) in connection with the newly established centre of excellence Silicon Photonics for Optical Communications (SPOC) funded by the Danish National Research Foundation. Facilities at the National cleanroom Danchip (http://www.danchip.dtu.dk) will be used for the project. Start date is 1st of October or as soon as possible. Project description The PhD study is directed at design, fabrication and characterization of non-linear waveguides and simple devices in different materials aiming at the most efficient nonlinear platform allowing extremely high power handling. •The design is mainly related to waveguide dispersion, mode-expanders and possibly resonator structures. •The main challenge lies in the (cleanroom) fabrication of devices and the trade-off between intrinsic material properties and processing abilities (e.g. scattering loss from waveguide sidewalls). •The study will start with optimizations of the AlGaAs on insulator platform and literature study of nonlinear materials suitable for integration. •The fabrication process is based first on wafer bonding to oxidized silicon for crystalline nonlinear materials or various deposition methods, as LPCVD, IBSD, ALD etc., for amorphous materials to create the base material for the devices. This is followed by e-beam or DUV patterning, and subsequently dry-etching/lift-off processing has to be done, and finally possible cladding layers deposited. •For each material chosen the fabrication needs to be optimized to ensure the extremely smooth surfaces needed to lower the linear losses of the devices. Finally, linear and nonlinear characterization of the waveguides will be carried out by the candidate. Qualifications Candidates should have a master's degree in engineering or a similar degree with an academic level equivalent to the master's degree in engineering. Good communication skills in written and spoken English are a must. Approval and Enrolment The scholarships for the PhD degree are subject to academic approval: only candidates with an above the average marks are accepted in the program. For information about the general requirements for enrolment and the general planning of the scholarship studies, please see the DTU PhD Guide. Assessment The assessment of the applicants will be made by Centre Leader, Professor Leif Katsuo Oxenløwe and Associate Professor Kresten Yvind. Salary and appointment terms The salary and appointment terms are consistent with the current Danish rules for PhD degree researchers. The period of employment is 3 years. Supervisors and further information •Centre Leader, Professor Leif Katsuo Oxenløwe, lkox (at) fotonik.dtu.dk, tel; +45 4525 3784, •Associate Professor Kresten Yvind, kryv (at) fotonik.dtu.dk, tel; +45 4525 6366. You can read more about the centre at http://www.spoc.dtu.dk and about DTU Fotonik at http://www.fotonik.dtu.dk. Application procedure Please submit your online application no later than August 2, 2015. Applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link "Apply online," complete the online application form, and attach all your materials in English in one PDF file. The file must include: •A letter motivating the application (cover letter) •Curriculum vitae •Grade transcripts and B

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