Category Archives: Uncategorized

David celebrated the 12.5-year anniversary

Time flies fast. David has worked 12.5 years at the University of Twente since his Ph.D. To celebrate this very Dutch anniversary, he brought some Indonesian snacks this week to the whole group.

Congrats, David! Hope you and we as the whole group can make even bigger achievements in the next 12.5 years.

Klaus handed David the celebration letter from the faculty

Redlef graduated

On January 20th, Redlef Braamhaar defended his MSc thesis titled Polarization pulling in a stimulated Brillouin scattering based microwave photonic filter under the supervision of Yvan and Steven.

After the defense Redlef received a bottle of Whiskey as a gift, which he emptied just an hour later at the celebration party. Congrats Redlef, hope you are not too drunk!

Redlef received the gift from Yvan after the defense

Okky’s last day in our group

After a short graduation trip around Europe, Okky revisited the group for the last time before he leaves the Netherlands. Later, he will start a new life in Indonesian Air Force as a researcher.

Good luck, Okky! You are always welcome in our group and hope to see you again in the future!

Okky in front of his setup

Potluck party 2022

As 2022 draws close to the end, the group organized a potluck dinner this week to celebrate the coming of the Christmas break. We shared Dutch, German, Pakistani, Chinese, and Indonesian food at the party, and all of them are amazingly delicious!

2022 has been a big year for the group. We have gone through ups and downs together (mostly up :-). Merry Christmas and happy new year everyone! Wish all of us can continue the success in 2023!

Group photo at the potluck party

New Publication in Nature Communications

We are excited to announce that our new paper  Ultrahigh Dynamic Range and Low Noise Figure Programmable Integrated Microwave Photonic Filter has been published in Nature Communications.

Artistic impression of an ultra-high dynamic range programmable integrated MWP circuit.

In this work, we demonstrate reconfigurable filter functions with record-low noise figure and a RF notch filter with ultra-high dynamic range. We achieve this unique feature using versatile complex spectrum tailoring enabled by an all integrated modulation transformer and a double injection ring resonator as a multi-function optical filtering component. Our work breaks the conventional and fragmented approach of integration, functionality and performance that currently prevents the adoption of integrated MWP systems in real applications.

This publication is another achievement for the group in a fruitful 2022. Congrats Okky, Gaojian and the team for all the heroic efforts!

This post also appears at the front page of the University of Twente.

Okky graduated with Ph.D. Cum Laude

We are super excited that Okky Daulay earned his Ph.D. Cum Laude on December 14th, 2022.

Okky spends four years in our group and has always been an excellent experimentalist, an ambitious colleague, and a dependable teammate.

Thank you for your dedication, Okky! Congratulations and wish you all the best!

Okky defended his Ph.D. thesis with his paranymphs (Steven and Yvan)
Group photo after Okky’s defense

New publication in Science Advances

We are excited to announce that our new paper Guided-acoustic stimulated Brillouin scattering in silicon nitride photonic circuits has been published in Science Advances.

3D illustration of the concept of trapping photon and phonon in multilayer silicon nitride waveguides

In this work, we use the symmetric double-stripe silicon nitride waveguide from LioniX to guide both the photon and phonon, showing the possibility to integrate stimulated Brillouin scattering in large circuits. This breakthrough will potentially be integrated with other emerging technologies such as tunable lasers, frequency combs, and programmable photonic circuits, and giving them a part in the future development of fields ranging from telecommunications to quantum computing.

This publication is a great achievement for Roel, and of course, also for the whole team. Congrats all!

Photo of the team (from left to right: Okky, Steven, Roel, Peter, David, and Yvan)

This news also appears at the front page of the  University of Twente website.