Nano-Structure device focuses on the topics of solid state physics in nanostructures for further understandings of advanced semiconductor devices based on the fundamental of solid state physics. Topics include formation of heterojunction, band profiles of heterostructure, Density of states of nanostructures, Electron transport and scattering mechanisms in nanostructures, Electron-photon interaction, spin transport, coulomb blockade, quantum computing.
By the end of this course, students will be able to:
1. Illustrate Band profile of heterojunction.
2. Evaluate density of states and carrier concentration of semiconductor nanostructures.
3. Calculate current density of nanostructure devices under an appropriate transport modelling.
4. Explain typical electron scattering models in semiconductors.
5. Explain electron-photon interactions in solids
6. Explain spin physics in solids
7. Explain basic principle of quantum computing.
heterojunction, band discontinuity, density of states, ballistic transport, tunneling transport, optical absorption, optical gain, single electron transport, Coulomb blockade, spin transport, quantum computer.
|Intercultural skills||Communication skills||✔ Specialist skills||Critical thinking skills||✔ Practical and/or problem-solving skills|
Lecture is provided by Power-point presentation. Quizzes or exercise problems will be assigned in the class.
|Course schedule||Required learning|
|Class 1||Introduction, formation of heterostructure, electron transport across heterojunction, 2DEG.||Illustrate Band profile of heterojunction, 2 dimensional electron gas (2DEG).|
|Class 2||Electronic states in quantum structures, density of states of quantum-well and quantum-wire structures.||Explain and calculate density of states of bulk and quantum confined structures|
|Class 3||Electron transport in quantum structures.||Explain and calculate electron current of ballistic transport and tunneling transport in quantum structures|
|Class 4||Scattering processes in semiconductor devices.||Explain scattering mechanism in semiconductor heterostructures and nanostructures.|
|Class 5||Electron-photon interaction in semiconductor nanostructures||Explain calculation method of electron-photon interaction in semiconductors.|
|Class 6||optical absorption and amplification||Explain relation between Optical absorption/amplification and spontaneous emission/stimulated emission coefficient.|
|Class 7||Device application of heterojunctions.||Explain device applications of semiconductor heterostructures.|
|Class 8||Confirmation of understandings||Solve problems.|
|Class 9||Overview of nanoscale devices||Explain the basic quantum principles that govern the nanoscale devices|
|Class 10||Coulomb blockade, single electron transport||Review of the electron transport and explain the basic idea of the coherent transport.|
|Class 11||Current formula for the coherent conductor - Landauer formula||Explain basic idea of Landauer formula applicable to the coherent conductor.|
|Class 12||Coulomb blockade in the small single tunnel junctions||Explain basic idea of the Coulomb blockade in the small tunnel junctions.|
|Class 13||Single electron box and single electron transistors||Explain how the Coulomb bloclade is used for the single electron box and single electron transisitor.|
|Class 14||Coulomb blockade in the small Josephson junctions - Effect of Quantum coherence -||Explain Coulomb blocakde in the small Josephson juctions, number-phase relationship and the importance of quantum coherence.|
|Class 15||Quantum bits and idea of quantum computing||Explain the principle and future prospects of quantum computing.|
Presentation slides for the lecture will be provided as PDF files downloadable from OCW-i.
Quizzes in the lecture:20%, Intermediate test:40%, Final exam or report: 40%
Semiconductor Physics(EEE.D211) and Semiconductor Physics (EEE.D411) are recommended (not mandatory).