Author Archives: Lode

Upcoming talk at ImagineNano 2015

I will be presenting our latest paper entitled Magnetoplasmonic design rules for active magneto-optics in the Photonics, Plasmonics and Magneto-Optics (PPM) conference at ImagineNano 2015 in Bilbao (March 10-12). The theoretical results from the paper will be illustrated with our latest measurements on 3D magnetoplasmonic nanoparticles.

New paper published in Nano Letters

Our latest paper entitled “Magnetoplasmonic design rules for active magneto-optics” has been published in Nano Letters. In this paper we illustrate how asymmetric magnetoplasmonic nanoparticles can be exploited to obtain highly tunable control over the polarization states of light.

This paper is the result of an intense collaboration between the Bionanophotonics group in Chalmers and the Nanomagnetism group in CIC NanoGUNE (Spain).

The full text version is available from ArXiv as well.

New paper published on Plasmonic Quasicrystals

Our latest paper on plasmonic quasicrystals by Ruggero Verre has just been published in ACS Nano. The article is entitled Quasi-Isotropic Surface Plasmon Polariton Generation through Near-Field Coupling to a Penrose Pattern of Silver Nanoparticles.

In this work, we analyze the properties from a Penrose quasicrystal consisting of plasmonic nanoparticles in experiment and calculation and show how it can be applied as an omnidirectional plasmonic color router.

New paper on PhotoNVoltaics project published

An overview paper by our collaborator Christos Trompoukis from imec has recently been published in Physics Status Solidi A. The paper entitled “Photonic nanostructures for advanced light trapping in thin crystalline silicon solar cells” gives an overview of the effects of nano-patterning in thin crystalline silicon solar cells. The work is a result of the collaborative EU-funded project PhotoNVoltaics which involves academic and industrial partners from Belgium, Sweden and France.

New paper on SERS published

Our new paper by Masahiko Shioi (Panasonic) has recently been published in Applied Physics Letters. This work dates back to my work as a PhD student in IMEC, when we collaborated with Panasonic on a biosensing project focusing on SERS.

In this work we show how the performance of SERS can be boosted by using a double resonant nanostructure. We investigate a periodic array of gold nanodisks separated from a continuous gold mirror by a thin oxide layer. As such, the particles act as a diffraction grating which allows to couple to a propagating SPP mode on the gold film, while they also show a pronounced dipolar LSPR mode. These 2 can be tuned separately by playing with the grating pitch and the nanoparticle size, and as such we optimized the structure to exhibit the SPP mode at the pump laser wavelength, while the LSPR overlaps with the main raman scattering bands.

Tuning the interaction between propagating and localized surface plasmons for surface enhanced Raman scattering in water for biomedical and environmental applications.

The full text version is also available from the Scientific papers page on this website.

2 Upcoming talks confirmed

I’m very delighted to announce that next to the talk at SPIE Photonics Europe which I announced last week, I will also present our recent work at InterMag in Dresden on Monday 5th of May. The talk is entitled “From 2D to 3D magnetic anisotropy engineering towards highly tunable magnetoplasmonic polarization control in Ni nanoparticles”.

Upcoming talk at SPIE Photonics Europe

I will present some of our recent work on the transition from 2D to 3D magnetoplasmonics in nickel nanoparticles at the upcoming SPIE Photonics Europe meeting in Brussels. The talk entitled “Magnetoplasmonics going 3D” is scheduled on Wednesday April 16th and is part of the Nanophotonics conference.

The day before our Collaborator Ilya Razdolski from Radboud University Nijmegen will also present some of our recent joint work in the same conference in a talk entitled “Nonlinear optics of magnetoplasmonic resonance in Co nanodisks”.

Swedish winter 2.0 looking around the corner…

I almost cannot believe that I already live for one and a half year in lovely Sweden now, time really flies when you’re enjoying yourself! Now we are slowly preparing for the long and dark Swedish winter, which is almost peaking around the corner. When I say preparing, what I really mean is mentally preparing for the very short days too come. Somehow I never really care about the cold, which is still reasonable in the south of Sweden. We’re now close to the point where the last colorful leaves fall from the trees, and the sun quits her duty already at 5. A few weeks from now we’ll get temperatures below zero, and hopefully loads of snow! More then ever before I like snow now, as it kind of brightens up the dark nights, and it’s just so lovely to hear the cracking of fresh or even frozen snow below your feet.

As a consequence of the short days and long nights, all Swedes will put out Christmas lighting very soon, and damn if you don’t! This of course makes the winter scenes much more nice as the Christmas atmosphere is all around you for a quite long time. One of my personal favorites is definitely “Jul på Liseberg”, the Christmas market in amusement park Liseberg, over which I have a nice view from my garden. They have the largest Christmas tree in Gothenburg, which is built by lights hanging from the 120 meter high Atmosphere ride (another favorite of mine I realize now 😉 ). The park is lighted up by over 6.000.000 twinkling lights, which give the place some true magic. And of course, the food is awesome, many traditional products to taste, although I must say that I miss the Jenever that we usually have at a Belgian Christmas market 🙂

Jul på Liseberg

After the Christmas market, it is time to meet with the family and friends again, two weeks of holidays in Belgium it is! It will be fun again to have a few slightly longer days for a change 😉 Of course I also look forward to seeing my lovely godson Toon again, I imagine he’ll suddenly seem very big to me now! But to be honest, I’m not going to wait that long, in 3 weeks I’ll spend a few days in Belgium as well, after I made a quick stop in London to see Motörhead touring with their new album Aftershock!

toon_en_ik
Me and Toon

peter
Because I promised so, I kept word: I disguised myself as Jack Sparrow for the baby shower party!

In the mean time, things are very busy at work, a lot of nice results coming in recently. The first two projects are nearly finished and will hopefully be published very soon, and I hope for many more to come!

In order to prevent myself from getting a burn-out I have plenty of relaxing side activities going on now, to begin with our dart team “the Assassins” here in Gothenburg. Next to that, an other dart trip with my 2 Belgian teams to Scotland (Edinburgh) will follow in the end of march, and a visit to Anfield for Liverpool vs. Chelsea will follow one month later. Only have to start making up my mind for the festival agenda of next summer and hopefully some nice shows to serve at with the Gothenburg crew 😉

3 upcoming talks in August

August will be a busy month again, with 3 upcoming talks confirmed:

One year in Gothenburg

There’s an old saying which states that time really flies when you’re enjoying yourself. After living for about one year in Gothenburg in the south-west of Sweden, I have to admit that I came to realize how very true this is. Before I even realized, it turned out that my first year in Sweden is already over, which means that I had a really great time here.

Why Gothenburg, why Sweden?

When I decided last year to move to Sweden after finishing my PhD project at IMEC, many people were surprised by my choice to move to Sweden. “You know how cold it is there in the North?” was one of the comments I heard so many times from my friends in Belgium. Truth is, it is not really that much colder here than it is in Belgium, as Gothenburg is located in the South of Sweden at the west coast. I guess in winter and summer it might be about 2 or 3 degrees colder on average, while in spring and fall the climate is pretty much comparable to Belgium.

Obviously, the real reason for moving here had nothing to do with the climate, but was actually the fact that I could get a new professional challenge at Chalmers University of Technology, where I’m currently working as a post-doctoral researcher in the exciting field of magneto-plasmonics. In our everyday work, we investigate the interaction of magnetic nanoparticles with light, looking at the possibilities to control the polarization state of light by means of magnetic fields, or to try and use light to change the magnetization state of these nanoparticles. This might lead to very new applications in optical chips, magnetic memories and different types of sensors. The work I do here is very closely related to the things I was investigating before, although the magnetic part of the work takes things up to a higher level, opening up many more possibilities for future applications.

When deciding whether or not I wanted to move here, I thing the main drive was that I could go and get some international experience, which is very valuable in our line of work. On top of that, being single at the time, I also saw no reason to not accept this new challenge, because I realized I would probably never take such a step if I wouldn’t have done it at that point. And at this moment, I cannot say that I regretted it for a single minute…

Another important reason for me was that I really liked Gothenburg when I visited it two years ago for a conference at Chalmers that was hosted by my current boss. Although Gothenburg with its 500.000 inhabitants is the second largest city of the country (after the capital Stockholm) it still has a small-town feel. This is something I particularly like in a place, as everything feels very relaxed, while there are always a lot of things going on. On top of that, there is a lot of green in the city and everything is nearby so one can easily get around with public transportation or by bike.

And obviously, being into metal and hardrock music, Scandinavia is a nice place to be at 😉

What did I learn about Sweden?

Obviously, being immersed into a new culture, I learned quite a lot of things about the Swedish life style, and some of them I think are worth mentioning here…

Everything is very strictly organized

I would say this can both be seen as something good or bad. What I mean with this statement is that the government is pretty rigid in the services they offer to the inhabitants, so it makes it quite easy to move here (at least as an EU-citizen), although you’ll be meeting with the people from Skatteverket (the government institution that takes care of taxes, but also health insurance and other documents such as you ID-card) a lot in the first few weeks. They provide you with a personal number, which is something that you’ll need for almost everything, and then I really mean everything. Some examples: when you want a bank account, internet connection, mobile phone contract and many more.

Some more examples are to be found in the tax and pension systems. After working here for only about 3 months, the government told me that I could retire the first of May 2049, a letter that is worth keeping I guess 😉 When I got my tax declaration from last year, I only needed to confirm online, through the app or by SMS that I agreed on the data supplied by the tax agency. After doing so, I got my refund only a few days later, so it turns out that it doesn’t really have to be that complicated. Also, in terms of pension, I received a statement about how much I would be getting from 65 to 70 and how much I would get for all the years after that. Not only was I pleasantly surprised with the amount (as it only related to a half year of working here), but also by the fact that they actually tell you upfront what to expect. I guess the Belgian government is not really in a position to make any promises in this respect, assuming it would still exist by the time I retire.

One example of where I don’t like all these strict rules: Swedish festivals. Being Belgian, my first festival experience here was really a big surprise, as we are used to festival where almost anyone can consume a beer wherever and whenever he/she wants. Not in Sweden of course! First of all, you need to be 18+ before you can go to the bar, and obviously security will check your ID in case of doubt 😉 Secondly, you’ll be drinking your beer in a separated drinking-zone. It’s not surprising that at the end of a festival day most people will be sitting there and watching the shows from a distance.

The same thing applies when you just go to a pub, each and everyone of them will have security guards at night, which in many cases to me seems like an over-kill.

Fika

The habit of enjoying Fika is something really important in the Swedish society. Fika is when people meet up to enjoy some pastries and coffee, which happens both at the workplace or just on a day off when you can go to one of the many bars in the city. Coffee is something very important to the Swedes anyhow, as they are the second largest coffee consumers per capita after the finnish. Luckily I love coffee so I’m helping them to become first, varsågod!

Did IKEA explode in your house?

A simple answer: Yes! I don’t think it is possible to find any house in Sweden where there is no IKEA items to be found.

Systembolaget

Well, this is exactly what it says: the company of the system, the only place where one can go to buy alcoholic beverages (apart from bars that is ;-)). You find many of them spread all over the country. As a belgian this is also something strange to see, as we are used to being able to buy alcohol in almost any store (supermarket, gas station, night shops). Needless to say that Friday afternoon and Saturday are top selling days here, and you can expect a pretty big queue on those days. I must say that originally it felt kind of strange to have to go to the government stores, but in the end the concept is actually very nice. Although you pay a lot for your drinks, the selection they offer is so broad that it makes up for it. I really tried some Belgian beers that I never even saw in Belgium before, and obviously they were nice!

Take a number

It doesn’t really matter where you go, you are pretty likely to find a queueing system where you have to pick a number and wait your turn. By itself this is not really that odd, but you get surprised by the number of places where you need to get one…

The high tax rate

I must say that actually in Sweden I never have the feeling that I’m paying too much taxes. I would even say that it is no surprise that Belgian politicians often mention the Scandinavian countries or Sweden in specific when debating about taxing systems. The key lies in the fact that the income tax (including social security) is not extremely high (at about 30% on average), and even if you get a raise which takes you to a higher tax level, the higher rate is only applied to the part that is above the limit of the tax level. On the other hand you pay more taxes on consumption, with the standard V.A.T. rate being 25%, and the taxes on alcohol being ridiculously high.

Last but not least

The Swedes are in my opinion a very open society, who welcome newcomers very easily. With nearly everybody being fluent in English, it is really easy to move in and to meet new people. As soon as people realize that you’re not fluent in Swedish, they will talk to you in English. This is something positive at first, but when trying to learn the language then it can also be kind of a burden.

I guess that’s all for now, up to an other exciting year in Sweden!