KTH Royal Institute of Technology, School of Engineering Sciences

KTH Royal Institute of Technology in Stockholm has grown to become one of Europe’s leading technical and engineering universities, as well as a key centre of intellectual talent and innovation. We are Sweden’s largest technical research and learning institution and home to students, researchers and faculty from around the world. Our research and education covers a wide area including natural sciences and all branches of engineering, as well as architecture, industrial management, urban planning, history and philosophy.

Project description

Third-cycle subject: Physics - specialization optics and photonics

The project concerns applied research in the field of integrated nonlinear optics in the framework of the European Network MICROCOMB, aiming at the demonstration of frequency comb generators based on quadratic nonlinearities. Frequency comb research is a Nobel prize winning area and frequency comb generators in compact integrated microresonators (microcombs) are now rapidly emerging as a disruptive technology with multi-disciplinary applications, which encompass metrology, ultrafast signal processing, astronomy, spectroscopy, quantum optics and soliton physics.

The goal of this project is to explore, through theory and experiments, the potential of quadratic optical nonlinearities for a novel class of microcomb devices. The project shall build upon the state-of-the-art nanophotonic platform developed at KTH for ultrahigh confinement and low loss waveguides in lithium niobate on insulator (LNOI) and investigate with it novel nonlinear effects and devices, to demonstrate on-chip microcombs operating with quadratic nonlinearities in the cascading regime.

Through the project, you will become an expert in LNOI nanophotonics, microcombs and nonlinear optics and receive high-quality training in a broad range of experimental techniques for photonic device characterization, fabrication and modelling. Furthermore you shall gain skills in research collaboration, mobility and innovation and take part in a rich programme of trans-national scientific exchanges and events withing the MICROCOMB network, involving leading industry and academic partners across Europe.


What we offer

  • The possibility to study in a dynamic international research environment in close cooperation with industries and advanced universities the world over.
  • Life-long network through KTH's Alumni organization.
  • A personal study plan to support your development within your areas of interest.
  • A workplace with many employee benefits and monthly salary according to KTH's doctoral student salary agreement.
  • Work and study in Stockholm, one of Europe´s fastest growing capitals, which is close to both nature and the sea.
  • Help to relocate and get settled in Sweden and at KTH.
  • A highly-interdisciplinary, dynamic and creative research environment.
  • State of the art facilities and training in nanophotonic device fabrication, design and characterization.
  • An exciting research programme comprising international schools, workshops, and secondments in academia and industry.


To be admitted to postgraduate education (Chapter 7, 39 § Swedish Higher Education Ordinance), the applicant must have basic eligibility in accordance with either of the following:

  • passed a degree at advanced level,
  • completed course requirements of at least 240 higher education credits, of which at least 60 higher education credits at advanced level, or
  • in any other way acquired within or outside the country acquired essentially equivalent knowledge.

Moreover, to comply with the requirements of EU MCS-ITN actions, the applicant:

  • must not have resided or carried out her/his main activity in Sweden for more than 12 months in the last 3 years
  • should be in the first 4 years of her/his research career and have not been awarded a doctoral degree.


In order to succeed as an doctoral student at KTH you need to be goal oriented and persevering in your work. In the selection of the applicants, the following will be assessed:

  • ability to independently pursue his or hers work,
  • ability to collaborate with others,
  • have a professional approach and
  • analyse and work with complex issues.
  • background and academic credentials in Physics or Engineering Sciences, with specific relevance to nanotechnology, integrated optics and nonlinear optics,
  • communication skills and English proficiency,
  • problem-solving skills, creativity and motivation for pursuing doctoral studies.

After the qualification requirements, great emphasis will be placed on personal qualities and personal suitability.

Target degree: Doctoral degree.

Information regarding admission and employment

Only those who are or have been admitted to third-cycle studies may be employed as a doctoral student. The term of the initial contract may not exceed one year and may thereafter be extended. Doctoral students may engage in teaching, research, and administration corresponding to a maximum of 20 % of a full-time position.

Union representatives

You will find contact information for union representatives on KTH's website.

Doctoral section (Students’ union on KTH Royal Institute of Technology)

You will find contact information for doctoral section on the section's website.


Apply for the position and admission through KTH's recruitment system. It is the applicant’s responsibility to ensure that the application is complete in accordance with the instructions in the advertisement.

Applications must be received at the last closing date at midnight, CET/CEST (Central European Time/entral European Summer Time).

Applications must include the following elements:

  • CV including your relevant professional experience and knowledge.
  • Application letter with a brief description of why you want to pursue research studies, about what your academic interests are and how they relate to your previous studies and future goals. (Maximum 2 pages long)
  • Copy of the degree certificate(s) and transcripts of records from your previously attended university-level institutions. Translations into English or Swedish if the original documents are not issued in one of these languages.
  • Representative publications or technical reports. For longer documents, please provide a summary (abstract) and a web link to the full text.

Other information

Gender equality, diversity and zero tolerance against discrimination and harassment are important aspects of KTH's work with quality as well as core values in our organization.

For information about Processing of personal data in the recruitment process please read here.

We firmly decline all contact with staffing and recruitment agencies and job ad salespersons.

Disclaimer: In case of discrepancy between the Swedish original and the English translation of the job announcement, the Swedish version takes precedence.

Type of employment Temporary position longer than 6 months
Contract type Full time
First day of employment In spring 2019, according to agreement
Salary Monthly salary according to KTH's doctoral student salary agreement
Number of positions 1
Working hours 100%
City Stockholm
County Stockholms län
Country Sweden
Reference number S-2018-1784
  • Professor Katia Gallo, e-mail: gallo@kth.se, phone: +46765173315
Published 06.Dec.2018
Last application date 03.Mar.2019 11:59 PM CET

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