Conference Agenda

ESRS: Early Stage Researcher Session
Friday, 16/Sept/2022:
8:30am - 10:00am

Session Chair: Baptiste Bruneteau, Teem Photonics, France
Session Chair: Isaac Doughan, University of Eastern Finland, Finland
Location: B120

1st floor, 70 seats

This session is specially designed for participants in the first four years (full-time equivalent research experience) of their research careers and who have not been awarded a doctoral degree. We encourage PhD students to express their ideas and describe their scientific achievements to the conference audience.

Session Abstract

In contrast to the EOSAM Topical meetings, this session is thus designed to allow participants to present the preliminary status of their work, preliminary work not sufficiently accomplished for being presented in a TOM session, and not yet deserving a published contribution in the conference proceedings. It covers all topics in optics and photonics. 

The objective is to share and develop ideas, to exchange and discuss the possible issues, find help from pairs, …, around a research work.  

The contributions received in this session, although following the submission procedure for EOSAM contributions, will not be published in the conference proceedings, and will thus not be assigned a DOI. They will nevertheless be announced in the conference programs.

ID: 276 / ESRS: 1
Early Stage Reserch Session

Optical characterization of DNA origami-shaped silver nanoparticles created through biotemplated lithography

Kabusure Mogasa Kabusure1, Petter Piskunen2, Jiaqi Yang1, Mikko Kataja1, Mwita Chacha1, Sofia Ojasalo2, Boxuan Shen2,3, Tommi Hakala1, Veikko Linko2,4

1Department of Physics and Mathematics, University of Eastern Finland, Yliopistokatu 2, P.O Box 111, FI-80101, Joensuu, Finland.; 2Biohybrid Materials, Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16100, FI-00076, Aalto, Finland.; 3Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17165 Stockholm, Sweden.; 4LIBER Centre, Aalto University, P.O. Box 16100 FI-00076, Aalto, Finland.

Here, we study optically resonant substrates fabricated using the previously reported BLIN (biotemplated lithography of inorganic nanostructures) technique with single triangle and bowtie DNA origami as templates. We present the first optical characterization of BLIN-fabricated origami-shaped silver nanoparticle patterns on glass surfaces, comprising optical transmission measurements and surface-enhanced Raman spectroscopy. The formed nanoparticle patterns are examined by optical transmission measurements and used for surface-enhanced Raman spectroscopy (SERS) of Rhodamine 6G (R6G) dye molecules.

ID: 409 / ESRS: 2
Early Stage Reserch Session

Chip integrated photonics for ion based quantum computing

Steffen Sauer

TU Braunschweig, Germany

Ion traps are a promising platform for the realisation of high-performance quantum computers. To enable the future scalability of these systems, integrated photonic solutions for guiding and manipulating the laser light at chip level are a major step. Such passive optical components offer the great advantage of providing beam radii in the μm range at the location of the ions without increasing the number of bulk optics. Different wavelengths, from UV to NIR, as well as laser beam properties, such as angle or polarisation, are required for different cooling and readout processes of ions.

We present simulation results for different optical photonic components, such as grating outcouplers or waveguide splitters and their applications on ion trap chips. Furthermore, we will introduce the experimental setup for the optical characterisation of the fabricated structures.

ID: 408 / ESRS: 3
Early Stage Reserch Session

Hybrid polymer-titania waveguides for highly integrated circuits

Isaac Doughan

University of Eastern Finland, Finland

Highly integrated photonic circuitry is facing challenges when considering low-cost manufacturing and low-power consumption devices [1]. Current silicon photonic platforms (Si, Si3N4, SiO2...) are providing efficient solutions but are not always versatile or compatible with applications requiring broadband operations such as sensing for instance. The main waveguide-based sensing mechanism relies on the probing of the outer medium with the evanescent tail of the guided mode. To obtain a high limit of detection together with high sensitivity, the overlap between the analyte and the evanescent tail of the mode must be increased as well as the length of the waveguide, which yields an increase of the footprint of the device and the propagation losses. Double spiral waveguides are heavily used for waveguide sensing, providing interaction length of several centimeters.

ID: 406 / ESRS: 4
Early Stage Reserch Session

Managing the beam profile of a low spatial coherence high-power diode laser for gain material pumping

Thomas Dubé


We report a spatial profile management method that allows us to homogenize and shape a beam emitted from a high-power diode stack used as a pump source in high-power laser front-end amplifiers. It is based on imaging the far-field profile produced by propagating the diode beam through an engineered diffuser.

ID: 407 / ESRS: 5
Early Stage Reserch Session

Towards a deterministic single atom trap in the evanescent field of a Whispering-Gallery-Mode resonator

Gabriele Maron

Humboldt Universität, Germany

Whispering-gallery-mode (WGM) resonators are monolithic structures that guide light by total internal reflection, and exhibit ultra-high Q factors in combination with a small optical mode volume. They provide lossless in- and out-coupling of light via tapered optical fibers, and allow one to reach the strong coupling regime of cavity-QED when coupling a single atom to their evanescent field. Furthermore, these resonators exhibit chiral (i.e. direction dependent) light-matter interaction, which makes them attractive atom-photon interfaces for novel quantum information processing devices.

ID: 410 / ESRS: 6
Early Stage Reserch Session

Towards Kerr micro-comb generation in tantalum pentoxide micro-resonators

Jake Daykin

University of Southampton, United Kingdom

We present the design, fabrication, simulation, and initial characterisation of tantalum pentoxide

(Ta2O5) optical waveguides and micro-ring resonators for the purpose of supercontinuum and frequency comb


We use Ta2O5 sputtered on oxidised silicon wafers as a wave-guiding layer. Ta2O5 presents a number of advantages over other commonly used materials in integrated photonics. The linear refractive index of Ta2O5 is similar to that of Si3N4 at 1550 nm, and the nonlinear refractive index of Ta2O5 has been reported to be a factor of 3 greater than that of stoichiometric Si3N4 and an order of magnitude greater than of Si, suggesting that Ta2O5 is an interesting material for the generation of Kerr frequency combs. Additionally, Ta2O5 can be doped with rare-earth elements, such as Er, Nd and Yb, which allows for the creation of waveguide lasers.

ID: 157 / ESRS: 7
Early Stage Reserch Session

Imprinting characteristics of droplet lenses on liquid-repelling surfaces into light

Valeriia Bobkova (Ahlborn)1, Eileen Otte2,3, Sarah Trinschek4, Cornelia Denz1

1University of Muenster, Germany; 2Geballe Laboratory for Advance Materials, Stanford University, USA; 3Center for Soft Nanoscience, University of Muenster, Germany; 4Department of Engineering Physics, Muenster University of Applied Sciences, Germany

We propose an experimental method that allows the investigation of droplets on liquid-repelling surfaces. The described technique goes beyond the standard imaging approaches and reveals a plethora of spatial droplet information, which is usually unavailable. Liquid droplet lenses shape the transmitted light field of a Gaussian laser beam passing though them, thereby forming refracted three-dimensional (3D) light landscapes. We investigate numerically and experimentally these 3D landscapes which are customized depending on the droplet shape as well as its refractive index, and demonstrate the encoding of droplet information. This approach can also be applied for analyzing droplets showing high-speed dynamics, in order to reveal even minimal shape deviations. The developed technique complements and therefor extend the existing conventional tools for the investigation of the droplets formed on liquid-repelling surfaces.