The high-temperature photonics research in the institute for Optical and Electronic Materials is aimed to create a novel photonic bandgap structure which integrates the functionalities of high temperature stability, mechanical strength and can efficiently control thermal radiation emitted by high temperature sources. The prominent applications are the thermal barrier coatings for gas turbine and the selective emitters for thermophotovoltaics.

At high temperature the radiative heat transfer transfer becomes comparable to the heat transfer by convection and conductivity due to the fourth order dependency on temperature. Thus the technique for reducing the heat transfer at high temperature is focused on the rejection of incoming photons by changing the optical properties of the material system. If a photonic bandgap material is coated on a component, it is possible to significantly reduce the temperature of the underlying material by design the bandgap at the maximum of the thermal radiation spectrum. The theory and modelling of the structures on the basis of opals, composites and the inverse opals will be studied with the Finite Integration Technique (FIT) and the Plane Wave Expansion technique(PWE). The realization of the structure will be done by the means of self-assembly of microparticles and infiltration with ceramic material. The performance of the coating as radiation reflectors and emitters will be tested under ambient temperature and high-temperature (>1500 K).

Simulation of the yittria stabilized zirconia (YSZ) inverse opal showed that the structure possesses a photonic stopgap at the wavelength 1.9 mm with the full width half maximum (FWHM) of 380 nm. The transmission spectra of the structure were obtained as a function of incidence angle. As the angle of incidence increases relative to the surface normal, the position of the stopgap shifts toward the shorter wavelength. First experiment with the double-stacks heteroopals structure has shown the potential of the bandgap engineering with the opaline crystals. The resultant structure inherits the optical properties from each stack of opal and displays multiple stopgaps in the transmission spectra.

Wissenschaftliche Kontakte und Kooperationen

• Prof. Dr. Gerold Schneider, TUHH, Institute of Advanced Ceramics
• Prof. Dr. Horst Weller, Uni Hamburg, Institute of Physical Chemistry,
• Prof. Dr. Kornelius Nielsch, Uni Hamburg, Multifunctional Nanostructures

Publikationen

H.S. Lee, A. Petrov, M.Eich, R.Kubrin , R.Janssen and G.Schneider, ¿Angle Dependent Transmission of Ceramic Based Inverse Opal ¿,  META'10, 2nd International Conference on Metamaterials, Photonic Crystals and Plasmonics (2010)

The high-temperature photonics research in the institute for Optical and Electronic Materials is aimed to create a novel photonic bandgap structure which integrates the functionalities of high temperature stability, mechanical strength and can efficiently control thermal radiation emitted by high temperature sources. The prominent applications are the thermal barrier coatings for gas turbine and the selective emitters for thermophotovoltaics.

At high temperature the radiative heat transfer transfer becomes comparable to the heat transfer by convection and conductivity due to the fourth order dependency on temperature. Thus the technique for reducing the heat transfer at high temperature is focused on the rejection of incoming photons by changing the optical properties of the material system. If a photonic bandgap material is coated on a component, it is possible to significantly reduce the temperature of the underlying material by design the bandgap at the maximum of the thermal radiation spectrum. The theory and modelling of the structures on the basis of opals, composites and the inverse opals will be studied with the Finite Integration Technique (FIT) and the Plane Wave Expansion technique(PWE). The realization of the structure will be done by the means of self-assembly of microparticles and infiltration with ceramic material. The performance of the coating as radiation reflectors and emitters will be tested under ambient temperature and high-temperature (>1500 K).

Simulation of the yittria stabilized zirconia (YSZ) inverse opal showed that the structure possesses a photonic stopgap at the wavelength 1.9 mm with the full width half maximum (FWHM) of 380 nm. The transmission spectra of the structure were obtained as a function of incidence angle. As the angle of incidence increases relative to the surface normal, the position of the stopgap shifts toward the shorter wavelength. First experiment with the double-stacks heteroopals structure has shown the potential of the bandgap engineering with the opaline crystals. The resultant structure inherits the optical properties from each stack of opal and displays multiple stopgaps in the transmission spectra.

Wissenschaftliche Kontakte und Kooperationen

• Prof. Dr. Gerold Schneider, TUHH, Institute of Advanced Ceramics
• Prof. Dr. Horst Weller, Uni Hamburg, Institute of Physical Chemistry,
• Prof. Dr. Kornelius Nielsch, Uni Hamburg, Multifunctional Nanostructures

Publikationen

H.S. Lee, A. Petrov, M.Eich, R.Kubrin , R.Janssen and G.Schneider, ¿Angle Dependent Transmission of Ceramic Based Inverse Opal ¿,  META'10, 2nd International Conference on Metamaterials, Photonic Crystals and Plasmonics (2010)