Institute of Technical Physics at Riga Technical University

Smart materials & additive manufacturing
Optics & photonics

The Institute of Technical Physics (ITP) is dedicated to fostering competitiveness and modernity while providing an appealing environment for employees and students engaged in technical physics and technologies. Within the institute, several departments operate, each focusing on specific aspects of the discipline:

  • Department of Materials Physics
  • Department of Optics
  • Department of Semiconductor Physics
  • Scientific Research Laboratory of Materials Optics
  • Scientific Research Laboratory of Semiconductor Physics
  • Laboratory of Material Physics.

A primary area of focus at the ITP revolves around laser processing applied to semiconductors, metals, superconducting materials, nano-electronics, and optoelectronics. The institute is particularly interested in investigating the interaction between powerful laser radiation and semiconductors, such as CdTe, CdZnTe, Si, Ge, SiGe, GeSn, GaAs, TiO2, ZnO, InGaN, SnS, and SiC.

Recently, the ITP has been extensively researching ways to enhance the quality and phase transitions in semiconductors such as TiO2, CdS, InGaN, ZnO, and CdZnTe. Additionally, they have made remarkable strides in overcoming the equilibrium solubility of Sn atoms in Ge.

A key strength of the institute lies in its wide-ranging experience collaborating with research institutes abroad, including those in Germany, the UK, Switzerland, Japan, Taiwan, Spain, Lithuania, Ukraine, and Estonia. Furthermore, the ITP actively participates in cooperative international projects like FP7, H2020 exemplified by their contributions to CERN-coordinated ARIES and IFAST projects.

Another topic of the ITP is energy harvesting for wearable and portable applications; micropower management electromagnetic, triboelectric, and thermoelectric energy harvesters - design, development, and research. We elaborate electromagnetic, thermoelectric as well as triboelectric energy harvesters for wearable and other applications, as well as electronic systems for energy accumulation and sensor powering by accumulated energy.


Lasers are incredibly versatile tools for material processing, boasting a wide range of applications. Our institution has proposed and undertaken a novel approach that focuses on utilizing a temperature gradient field (referred to as the temperature gradient effect, or TGE) induced by powerful pulsed laser radiation for various materials processing purposes.

The main originality of our studies lies in leveraging the TGE to achieve diverse goals in different material processes. For instance, we can effectively redistribute impurity atoms, like Sn in the host material (Si)Ge of epitaxial solid solutions, which are grown using the molecular beam epitaxy method (MBE). Furthermore, this technique enables us to generate or anneal defects, depending on the specific material, and achieve controlled surface oxidation at the nanolevel, as well as the formation of quantum cones.

An additional advantage of employing the TGE is the formation of a graded bandgap structure for semiconductors, accomplished through the consistent redistribution of impurity atoms. Moreover, the approach facilitates the relaxation of residual stresses.

These groundbreaking studies offer a fresh perspective by incorporating laser radiation as a crucial step during the growth (e.g., by MBE) of high-quality solid solutions (Si)GeSn, containing a significant Sn content. This paves the way for the fabrication of (Si)GeSn based infrared optoelectronics and electronics, opening up new possibilities in the field.

In the field of energy harvesting, the complete wearable systems, including energy generation modules, power management modules, sensor modules, as well as communication modules for wireless data transmission, are elaborated for mainly wearable applications.


  • Application of laser technology for gamma detectors based on CdZnTe with the aim to improve responsivity and radiation hardness (Prof. Arturs Medvids).
  • Application of laser technology for structuring of a material surface using LIPSS, DLIP and DLW techniques. (Leading Researcher Pavels Onufrijevs).
  • Formation of different antiviral and antibacterial coating using laser technology including the control of hydrophobicity and the laser-induced pattering of the surfaces (Leading Researcher Pavels Onufrijevs).
  • Electromagnetic, triboelectric and thermoelectric energy harvesters - design, development, and research (Prof. Juris Blums).
  • Research and development of energy harvesting for wearable and portable applications; micropower management (Prof. Juris Blums).


  • The ITP offers well-equipped laboratories for laser structuring of materials using nanosecond laser radiation. Additionally, we provide a diverse range of characterization techniques for the obtained structures, including Raman spectroscopy, Atomic Force Microscopy (AFM), and UV-VIS-NIR-IR spectroscopy. At the faculty, researchers have access to SEM, EDX, XPS, and other advanced tools for material analysis.


  • We actively engage in strategic collaborations with various universities and companies at the institutional level, offering scientific services and fostering the development of pilot projects tailored to meet the specific needs of our customers.
  • We are actively seeking partnerships with companies and organizations within the space industry who share an interest in utilizing laser radiation for structuring, modification, and precise control of chemical compositions. Our expertise lies in leveraging laser technology to achieve these objectives and we are enthusiastic about collaborating with like-minded partners to explore new possibilities and advance the frontiers of space-related applications.
Total employees2222
Employees in space5
Turnover69 483 672,00 EUR
7 Paula Valdena iela
Contact persons: Pavels Onufrijevs