Fundamentals of Light Emission and Absorption in Solid-State: Interaction between Light and Matter toward Efficient Light Emitters

Thursday, May 28, 2015 to Friday, May 29, 2015

 

Infotech Oulu Doctoral Program

Lecturer: Professor Norihiko Kamata, Graduate School of Science and Engineering, Saitama University, Japan

Location: seminar room TS 3110

Course schedule:

28 May (Thu): Class (1 - 2)  9:15-12:00, 3 x 45 (+rest 15) min.

28 May (Thu): Class (3 - 5)  13:15-15:00, 2 x 45 (+rest 15)min.

29 May (Fri):  Class (6 - 8)   9:15-12:00, 3x 45 (+rest 15) min.

 

Short description of the course

Laser diodes (LDs) and light emitting diodes (LEDs) in near infrared region realized fiber communication systems in 1970’s and connected the world as an infrastructure of the world wide web. The realization of GaN-based blue and green LEDs in 1990’s opened another revolution in lighting and display applications, providing three primary colors by efficient solid state light sources. An important part of our natural energy depends on the technology of solar cells. Light-based science and technology are based on the interaction between light and matter. It is becoming more and more crucial for human society as life rely on solar radiation and vast information comes from our sense of sight.     

This lecture introduces a basic concept of the interaction between light and matter, science and technology of light emitting and receiving devices based on solid state physics and then an important framework from basic physics to the frontier of modern optical devices. Rates of light absorption, spontaneous emission and stimulated emission are connected by the Einstein relation, which revealed a general guiding principle for improving efficiency of optical devices. Special emphasis is placed on radiative and nonradiative recombination processes in actual semiconductor materials and their influence on device performance. It should be fascinating that a basic exercise in a class of elementary quantum mechanics is really a guiding principle of research frontiers for enlarging the wavelength region and improving efficiency of cutting edge optical devices. 

 

Headlines

Class 1.  Interaction between Matter and Light –Vibrating Electric Dipole

Class 2.  Basic Concepts of Solid-State Physics – Quantum Mechanical Treatment of Matter

Class 3.  Interaction of Light and Matter –Description by Photon Number

Class 4.  Optical Processes –Absorption, Spontaneous Emission and Stimulated Emission

Class 5.  Radiative and Non-radiative Recombination Processes

Class 6.  Light Emitting Devices and Their Efficiency Improvements

Class 7.  Efficient Photodetectors and Solar Cells

Class 8.  Summary –Frontier and Future of Light Emitters

 

More information: Anita Lloyd-Spetz

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Last updated: 16.4.2015