Instytut Wysokich Ciśnień

Dear Ladies and Gentlemen,

We are pleased to invite you to the IHPP PAS Seminar on Nitride Semiconductors. The next presentation will be held in a hybrid mode – at the New Technologies seminar room, Al. Prymasa Tysiąclecia 98, and through Zoom platform (to get the link, please contact us at nitride_seminar@mail.unipress.waw.pl ).

The next seminar is scheduled on Monday 08.05.2023 at 14:00.

Speaker: prof. Michał Leszczyński (IHPP PAS, NL-12)

Title: Point defects in nitride semiconductors - do they really exist?

Presence of vacancies enables atoms to move. In the seminar, the following examples of experimental data will be given: i) diffusion of indium atoms in InGaN quantum wells that leads to well homogenization and decomposition, ii) diffusion of Al atoms smearing out the AlGaN/GaN interfaces, iii) diffusion of silicon and magnesium dopants. These data were obtained during annealing with and without gallium atoms in the gas above the samples, what had a significant influence on the diffusion.

Sincerely,

Tadeusz Suski
Piotr Perlin
Anna Kafar

Dear Ladies and Gentlemen,

We are pleased to invite you to the IHPP PAS Seminar on Nitride Semiconductors. The next presentation will be held in a in-person mode – at the New Technologies seminar room, Al. Prymasa Tysiąclecia 98, and through Zoom platform (to get the link, please contact us at nitride_seminar@mail.unipress.waw.pl ).

The next seminar is scheduled on Friday 28.04.2023 at 14:00.

Speaker: Prof. Leo Schowalter
Founder (now retired) Crystal IS, Inc.;
Visiting Professor, IMaSS,Nagoya University;
Consultant, LJSchowalter LLC;

Title: Pseudomorphic growth of AlGaN on native AlN

Sincerely,

Tadeusz Suski
Piotr Perlin
Anna Kafar

Dear Ladies and Gentlemen,

We are pleased to invite you to the IHPP PAS Seminar on Nitride Semiconductors. The next presentation will be held in a hybrid mode – at the New Technologies seminar room, Al. Prymasa Tysiąclecia 98, and through Zoom platform (to get the link, please contact us at nitride_seminar@mail.unipress.waw.pl ).

The next seminar is scheduled on Monday 24.04.2023 at 14:00.

Speaker: dr hab. Małgorzata Wierzbowska, prof. IHPP PAS (IHPP PAS, NL-2)

Title: Perhaps "MB" can do for Unipress much more than "MD"

Unipress develops optoelectronic instruments and these devices should be theoretically designed with special care. Description of excitons, light and matter, including temperature and phonons, gets complicated due to the interactions of many fermions and bosons. The mathematical tools - second quantization, Green's functions, many-body (MB) perturbation theory - are difficult, even for theoreticians. The complexity of MB interactions exceeds that of the molecular dynamics (MD), which is not intended to describe the excited states with photons. The DFT either!

In this presentation, the existing modern developments for the interaction of light and matter will be reviewed, with the examples for photonic systems. We will also touch on a problem of device modelling - in an engineering way - with a special care for signal amplification and detection and existence of nonlinear optics in a quantum and "classical" manner. The maximal attention will be put to our intuition and making the presentation simple although comprehensive.

Thus it should be useful also for your future presentations!

Sincerely,

Tadeusz Suski
Piotr Perlin
Anna Kafar