News

Selected news from NanoPhoton

 


Paper on "Ultra-coherent Fano laser based on a bound state in the continuum" in Nature Photonics

Graphics: DTU Fotonik. The figure shows a schematic of light generation in a Fano laser.

In a recent paper in Nature Photonics, "Ultra-coherent Fano laser based on a bound state in the continuum", we show how a bound state in the continuum can be used to reduce the spectral linewidth of microlasers significantly. The microscopic laser developed at DTU Fotonik and NanoPhoton - Center for Nanophotonics prove to have fundamental advantages compared to other lasers. Please, find the paper here.


Tutorial papers in Top Downloads list for JOSA B

Topology optimization

We are proud to see that our tutorial papers on inverse design in photonics by topology optimization jumped to the top of the Top Downloads list for JOSA B upon publication and remain on the list ten months later.

Utilize topology optimization to design an optical metalens, a demultiplexer or a plasmonic reflector, either by the click of a button in COMSOL Multiphysics https://doi.org/10.1364/JOSAB.406048 or via a compact 200 line MATLAB code https://doi.org/10.1364/JOSAB.405955.


 

Modal Properties of Photonic Crystal Cavities and Applications to Lasers

We have reviewed the properties of the resonant modes of photonic crystal cavities with a special focus on line-defect cavities and applications to ultra-small and energy-efficient semiconductor lasers including slow-light photonic crystal lasers and Fano lasers. We have also covered emerging cavities for extreme dielectric confinement, which promise extremely strong light–matter interactions with deep sub-wavelength mode size and a high quality factor. 

You will find the paper here.


 

Official opening of NanoPhoton

We are very pleased to share some photos from the official opening ceremony of NanoPhoton - Center for Nanophotonics led by Prof. Jesper Mørk. It was a long-awaited and festive event. We extend our thanks to the Chairman of the Board of the Danmarks Grundforskningsfond/The Danish National Research Foundation, Prof. Jens Kehlet Nørskov, and the President of DTU, Prof. Anders Overgaard Bjarklev, for inspiring and supportive opening speeches. We also thank our collaborators and all of you who took the time to celebrate this wonderful occasion with us.

Rektor Anders Bjarklev og centerleder Jesper Mørk
President of DTU, Prof. Anders Overgaard Bjarklev and
  Center Leader of NanoPhoton, Prof. Jesper Mørk 

Tilhørere ved åbningen af NanoPhoton
Participants in the official opening of NanoPhoton

Jesper Mørk, Palle Jeppesen og Bjarne Tromborg
Jesper Mørk, Palle Jeppesen and Bjarne Tromborg

Maria Vittoria, Evangelos, Marco and Lotte
Members of NanoPhoton

 


 

Postdoc joins NanoPhoton

Ayman Nassar Kamel

We are pleased to announce that Ayman Nassar Kamel, Postdoc, joined NanoPhoton on 1 October.

Ayman works on the integration of EDC cavities with nano-electronic devices with a vision of providing a platform for sub-femto-joule-per-bit interconnects. He has experience in non-linear integrated optics and interface physics, both of which are useful for such nano-optoelectronic devices we hope to realize.  


 

PhD Student joins NanoPhoton

Maria Vittoria Gurrieri

We are pleased to announce that Maria Vittoria Gurrieri,
PhD Student, joined NanoPhoton on 1 October.

Maria Vittoria works on the development of theoretical
models for light-matter interaction in EDC-structures.
Her research is focused on the investigation of such
interaction in optical nanocavities coupled with 2D
materials. 


 

NanoPhoton Lecture: Single-photon quantum hardware: towards scalable photonic quantum technology with a quantum advantage by Peter Lodahl

Quantum dots embedded in photonic nanostructures offer a highly efficient and coherent deterministic photon-emitter interface [1]. It constitutes an on-demand single-photon source for quantum-information applications, enables single-photon nonlinear, optics and the constructing of deterministic quantum gates for photons [2]. We review recent experimental progress, and demonstrate that the current technology can be scaled up to reach quantum advantage [3] with the demonstration of near-transform-limited emitters in high-cooperativity planar nanophotonic waveguides [4]. The coherent control of a single spin in the quantum dot [5, 6] offers additional opportunities of generating advanced multi-photon entangled states [7]. We discuss potential applications of these novel deterministic photonic hardware in quantum computing and quantum communication [8], e.g., for constructing a resource efficient one-way quantum repeater [9].

References
[1] Lodahl et al., Rev. Mod. Phys. 87, 347 (2015). [2] Lodahl, Quantum Science and Technology 3, 013001 (2018). [3] Uppu et al., Science Advances 6, eabc8268 (2020). [4] Pedersen et al., ACS Photonics (2020). [5] Javadi et al., Nature Nanotechnology 13, 398 (2018). [6] Appel et al., Phys. Rev. Lett. 126, 013602 (2021). [7] Tiurev et al., Arxiv: 2007.09295. [8] Uppu et al., Arxiv: 2103.01110. [9] Borregaard et al., Phys. Rev. X 10, 021071 (2020).

 


 

NanoPhoton Lecture: From Photonic Crystals to Topological Nanophotonics by Masaya Notomi

 


 

NanoPhoton Lecture: Prospects and limitations of atomically thin semiconductors as laser gain material by Christopher Gies

 


 

NanoPhoton Lecture:Non-Radiating Electromagnetic Sourcesby Sergey I. Bozhevolnyi