nextnano

10/03/2026

Topological insulators are materials with an insulating bulk but conducting surface or edge states. This unusual behavior comes from their band structure: while the bulk remains insulating, topologically protected states appear at the boundaries and are remarkably robust against defects and disorder. Their unusual band structure and robust boundary states make topological insulators promising for applications in spintronics, low-power electronics, and quantum technologies. Existence of interface Dirac states in HgTe/CdTe was experimentally verified by Laurens W. Molenkamp's group at the University of Würzburg in 2D topological insulators in 2007.

Interested in engineering band structures than can give rise to protected edge states using the nextnano software?
We are currently preparing new k·p tutorials on:
• HgCdTe (bulk)
• HgCdTe/HgTe heterostructures
• 2D edge states in CdTe/HgTe stripes, including hybridization and decay constant analysis
• Trilayer InAs/GaInSb quantum wells

Want early access to the input files? Schedule a call with our CEO & Founder Stefan Birner:
https://calendly.com/nextnano/30min

Wikipedia: https://en.wikipedia.org/wiki/Topological_insulator

24/12/2025

Merry Christmas!

03/09/2025

🌍 nextnano at ITQW 2025 in Saint-Malo, France 🇫🇷
This week, our team members Takuma Sato and Thomas Grange are attending the Infrared and Terahertz Quantum Workshop: https://itqw2025.com
Today, Takuma presented his PhD work (funded by the EU project ) on: 🎤 “Non-equilibrium Green’s Function Modeling of Thresholds of Interband Cascade Lasers”. 🔬 The exciting part: The results of this PhD research are already integrated into our nextnano software, enabling users to perform quantum transport modeling of Interband Cascade Lasers (ICLs).
If you are interested in exploring how modeling can accelerate your ICL research, you can easily book a call with us here: 📅 Schedule a meeting: https://calendly.com/nextnano/30min

25/07/2025

We are happy to announce the release of nextnano++ and nextnano3 for macOS (ARM). https://www.nextnano.com/documentation/getting_started/downloads/macOS_and_Linux.html

12/05/2025

Our CEO & Founder Stefan Birner will be speaking on May-15, 15:00 CEST (GMT+02:00) at the QBN Quantum Leadership Session "Quantum Chips Design & Testing" about TCAD modeling of semiconductor-based qubits. Register here (Agenda): https://qbn.world/events/quantum-leadership-session-quantum-chips-design-testing/ or follow the live stream on YouTube.

28/03/2025

Last week, Thomas Grange, Takuma Sato and Stefan Birner attended the Infrared Colloquium at the Fraunhofer IAF Institute for Applied Solid State Physics in Freiburg, Germany.
The PhD students Takuma Sato and Borislav Petrović presented their work on "Quantum Transport and Detectivity of Type-II Superlattice Photodetectors Simulated by Non-Equilibrium Green’s Function Formalism" and "5.2 μm GaSb-based Interband Cascade Laser with Hybrid Superlattice Plasmon-Enhanced Claddings", respectively.
For me, it was a pleasure to interact with Philip Klipstein from SCD SemiConductor Devices as he was the one that derived the k.p interface Hamiltonian for T2SL that we implemented this year into the nextnano++ software.
The related tutorial is available here:
https://www.nextnano.com/documentation/tools/nextnanoplus/tutorials/T2SL_H-if_zb_III-V_Livneh_PRB_2012_1D.html
https://www.infrared-colloquium.de/

24/12/2024

Merry Christmas to our fantastic semiconductor community! 🎁 May your ideas flow seamlessly like electrons in a perfect transistor, and may the year ahead be full of groundbreaking developments in your research fields.

⚡We wish you high voltage success and low resistance challenges! ⚡

The animation shows a Christmas HEMT by nextnano. 🎄 ☃️
The input file: https://lnkd.in/d5hQ6yQq

19/07/2024

Hideki Miyazaki et al. from the National Institute for Materials Science (NIMS) in Japan published a nice article on "Antenna-enhanced high-resistance photovoltaic infrared detectors based on quantum ratchet architecture" where they used the nextnano software to engineer the wavefunctions in the multi-quantum well stack. If you are also working on Quantum Cascade Detectors, please make sure to check out our new update of the nextnano.NEGF software.
More details on this work:

We demonstrate a quantum ratchet detector, which is a high-resistance photovoltaic mid-infrared detector based on an engineered spatial arrangement of subbands.

23/05/2024

nextnano is thrilled to welcome Borislav Petrović to our nextnano team for a one-month secondment within the QUANTIMONY project!

Borislav brings a wealth of expertise in Photonics and Nanoelectronics, with a focus on mid-infrared interband cascade lasers.

Borislav is a PhD candidate at the Universität Würzburg under the supervision of Prof. Sven Hoefling

We are looking forward to the innovative solutions in the field of quantum technology from Borislav. Welcome to the team, Borislav! 🚀



nextnano
Borislav Petrović

15/05/2024

On Tuesday evening, nextnano hosted a company dinner at Biergarten Michaeligarten to extend a warm welcome to Dr Thomas Grange, the Director of Research & Development at nextnano Lab, during his working visit to nextnano.

nextnano Lab, a Research and Development company headquartered in the Grenoble area (France), was established three years ago. Its primary focus lies in developing simulation tools for quantum transport, based on the non-equilibrium Green’s function framework. Among its notable achievements is the development of the nextnano.NEGF software, which is commercialized by nextnano GmbH.

Under the project, nextnano and nextnano Lab are collaboratively developing 8-band NEGF simulation, which will soon enhance the capabilities of the nextnano.NEGF software to include interband devices such as the interband cascade lasers (ICLs).



nextnano GmbH
nextnano Lab
Stefan Birner
Thomas Grange
Heorhii Yehiazarian
Herbert S. Mączko
Takuma Sato