nextnano is a professional simulation software suite from nextnano GmbH for semiconductor nanodevices. It is primarily used to design, optimize, and analyze 1D, 2D, and 3D optoelectronic and quantum devices. Its product lineup includes the nextnano++ package, the nextnano.NEGF package, and a Bundle that includes both. This review focuses on the nextnano++ package, which covers applications such as quantum wells, quantum wires, quantum dots, LEDs, laser diodes, photodetectors, quantum cascade lasers, solar cells, transistors, superlattices, RTDs, qubits, and biosensors.
nextnano++ is the main tool, offering self-consistent multi-band k·p Schrödinger-Poisson-Current solving capabilities. It can calculate band structures, density of states, charge distributions, wave functions, current density, strain, piezoelectric/pyroelectric effects, magnetic-field effects, optical spectra, and electronic transport. On the materials side, it supports group-IV semiconductors, III-V and II-VI binary compounds, as well as ternary, quaternary, and quinary alloys, with crystal symmetries such as zincblende and wurtzite. nextnano³, the previous-generation tool, is still available and retains some unique features such as graphene, electrolytes, the 30-band model, and tight-binding, but the official recommendation is to use nextnano++.
Within the toolchain, nextnanomat provides a graphical interface, result visualization, input-file editing, batch processing, and workflow management. It also supports multi-core CPUs and cloud computing via HTCondor. nextnanopy is a Python package maintained on GitHub and PyPI, useful for parameter sweeps, automated runs, post-processing, plotting, and GDSII geometry import. It is the key interface for developer-oriented workflows and research automation. Documentation includes installation guides, download links, release notes, FAQs, error handling, and more than 100 tutorial input files. Support channels include the Help Center, widgets, and email.
Pricing is split into Free, Evaluation, and Standard tiers. Free is free of charge but has clear limitations: Windows only, 1 minute of CPU time, a restricted database, fewer tutorials, and no permission for paper publication or commercial use. Evaluation is free for 2 weeks, requires activation, and allows testing of the full 1D/2D/3D capabilities. Standard is for professional use, with terms of 1–3 years and up to 10 users, and permits paper publication and commercial use. Exact pricing requires contacting sales, so transparency is only average.
Its strengths are deep physical modeling, broad semiconductor application coverage, and both GUI-based operation and Python automation. It is well suited to university research groups, semiconductor R&D teams, and optoelectronic/quantum device engineers. Downsides include that the core software does not appear to be open source, commercial pricing is not public, and the Free version is only suitable for initial exploration. The source material does not provide information on access from China, so network reliability and payment convenience are unknown. Comparable alternatives include COMSOL, Synopsys TCAD, Silvaco TCAD, Lumerical, TiberCAD, and others.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on nextnano.com official site.
nextnano.com is an Germany Dev Tools provider. TG4G tracks its product information, an overall rating of 8.0/10, and a China-accessibility score of Workable. Click "Visit Official Site" to reach nextnano.com directly.