# Robert Fickler

**Academy Research Fellow**

## About me

I am an experimental quantum physicist trying to ask and answer fundamental questions that are hard to grasp, interesting to investigate, and challenging to implement. I received my Master’s degree in physics from Ulm University, Germany, in 2009. I also hold a Bachelor’s degree in philosophy (Ulm University, Germany, 2008) and I am a trained electronics engineer. I obtained my PhD degree from the University of Vienna, Austria, in 2014 and worked as a Postdoctoral Fellow at the University of Ottawa, Canada, and the Institute for Quantum Optics and Quantum Information - Vienna, Austria. In 2019 I joined the strong photonics research hub at Tampere University, where I established the Experimental Quantum Optics research group. Together with my group, we are working on quantum photonics experiments with an emphasis on complex structures of photons for high-dimensional quantum information as well as quantum plasmonics and nonlinear interactions of structured light with matter. We also recently started to venturing into the field of atom physics and structured matter waves.

## Responsibilities

Experimental Quantum Optics group leader

## Fields of expertise

We are working on quantum photonics, structured light, high-dimensional quantum information, quantum plasmonics, quantum nonlinear optics

## Top achievements

Robert Fickler has published more than 55 research papers in prestigious journals such as Science, Nature Physics, Nature Photonics, Physical Review Letters, Optica, etc.

Most important awards and distinctions:

- ERC Starting grant of the European Union (2021)

- Academy Research Fellowship of the Academy of Finland (2019)

- Banting Postdoctoral Fellowship of the Natural Sciences and Engineering Research Council of Canada (2016)

- Young Scientist of the International Union of Pure and Applied Physics (IUPAP)

for “his groundbreaking contributions to the entanglement of complex structures of photons, which have opened up new avenues for quantum communication.” (2015)

- Springer Thesis Award recognizing outstanding PhD research (2015)

- Top 10 breakthroughs of the year 2012 by IOP’s Physics World

## Mission statement

By complex structuring quantum light and studying its interaction with matter, we are having fun in the lab trying to understand the world a tiny bit better and hoping that our research will be useful one day…

## Research unit

## Research fields

Photonics, Quantum Optics, Structured Light, Light-Matter Interaction

## Funding

## Research career

since May 2021 **Associate Professor,** Tampere University, Tampere, Finland

Jan 2019 - Apr 2021 **Assistant Professor (tenure track)**, Tampere University, Tampere, Finland

May 2018 – Dec 2018 **Senior Postdoc** (head of laboratory in the group of Marcus Huber), IQOQI Vienna, Vienna, Austria

May 2016 – Apr 2018 **Banting Postdoctoral Fellow** (groups of Bob Boyd & Ebrahim Karimi), University of Ottawa, Ottawa, Canada

May 2015 – Apr 2016 **Postdoctoral Fellow** (groups of Bob Boyd & Ebrahim Karimi), University of Ottawa, Ottawa, Canada

Oct 2014 – Apr 2015 **Postdoctoral Fellow** (group of Anton Zeilinger), IQOQI Vienna, Vienna, Austria

Oct 2009 – Sept 2014 **Graduate research assistant** (Prea Doc) (group of Anton Zeilinger), **CoQuS-PhD-Student** (Vienna Doctoral Program for Complex Quantum Systems), University of Vienna, Vienna, Austria

Mar 2012 – May 2012 **Graduate research exchange** (group of Andrew White), University of Queensland, Brisbane, Australia

May 2008 – Apr 2009 **Graduate research assistant** (Masters), University of Ulm, Ulm, Germany, (group of Ferdinand Schmidt-Kaler)

## Selected publications

M. Hiekkamäki, R. F. Barros, M. Ornigotti, R. Fickler

Observation of the quantum Gouy phase

Nature Photonics, 16, 828 (2022)

M. Hiekkamäki, F. Bouchard, R. Fickler

Photonic Angular Superresolution Using Twisted N00N States

Phys. Rev. Lett. 127, 263601 (2021)

L. Kopf, J. R. Deop Ruano, M. Hiekkamäki, T. Stolt, M. J. Huttunen, F. Bouchard, R. Fickler

Spectral vector beams for high-speed spectroscopic measurements

Optica 8, 930 (2021)

M. Hiekkamäki, R. Fickler

High-Dimensional Two-Photon Interference Effects in Spatial Modes

Phys. Rev. Lett. 126, 123601 (2021)

F. Brandt, M. Hiekkamäki, F. Bouchard, M. Huber, R. Fickler

High-dimensional quantum gates using full-field spatial modes of photons

Optica 7, 98 (2020)

S. Ecker, F. Bouchard, L. Bulla, F. Brandt, O. Kohout, F. Steinlechner, R. Fickler, M. Malik, Y. Guryanova, R. Ursin, M. Huber

Overcoming Noise in Entanglement Distribution

Phys. Rev. X 9, 041042 (2019)

M. Hiekkamäki, S. Prabhakar, R. Fickler

Near-perfect measuring of full-field transverse-spatial modes of light

Optics Express 27, 31456 (2019)

A. Safari, R. Fickler, E. Giese, O. S. Magaña-Loaiza, R. W. Boyd, I. De Leon

Measurement of the Photon-Plasmon Coupling Phase Shift

Phys. Rev. Lett. 122, 133601 (2019)

S. Lemieux, E. Giese, R. Fickler, M.V. Chekhova, R.W. Boyd

A primary radiation standard based on quantum nonlinear optics

Nature Physics 15, 529 (2019)

H. Larocque, D. Sugic, D. Mortimer, A. J. Taylor, R. Fickler, R. W. Boyd, M. R. Dennis, E. Karimi

Reconstructing the topology of optical polarization knots

Nature Physics 14, 1079 (2018)

A. Sit, F. Bouchard, R. Fickler, J. Gagnon-Bischoff, H. Larocque, K. Heshami, D. Elser, C. Peuntinger, K. Günthner, B. Heim, C. Marquardt, G.Leuchs, R. W. Boyd, E. Karimi

High-Dimensional Intra-City Quantum Cryptography with Structured Photons

Optica 4, 1006 (2017)

R. Fickler, G.T. Campbell, B.C. Buchler, P.K. Lam, A. Zeilinger

Quantum entanglement of angular momentum states with quantum numbers up to 10,010

PNAS 113, 13642 (2016)

**Reviews and Roadmaps:**

M. Piccardo, et al. Roadmap on multimode light shaping

Journal of Optics 24, 013001 (202 1)

F. Bouchard, A. Sit, Y. Zhang, R. Fickler, F. M. Miatto, Y. Yao, F. Sciarrino, E. Karimi

Two-photon interference: the Hong-Ou-Mandel effect

Rep. Prog. Phys. 84, 012402 (2021)

D. Paneru, E. Cohen, R. Fickler, R. W. Boyd, E. Karimi

Entanglement: Quantum or Classical?

Rep. Prog. Phys. 83, 064001 (2020)

M. Erhard, R. Fickler, M. Krenn, A. Zeilinger

Twisted Photons: New Quantum Perspectives in High Dimensions

Nature Light: Science & Applications, 7 17146 (2018)