Mesoscopic photocurrent flow patterns in a two-dimensional electron gas:
Gespeichert in:
| 1. Verfasser: | |
|---|---|
| Format: | Abschlussarbeit Buch |
| Sprache: | English |
| Veröffentlicht: |
Garching b. München
Verein zur Förderung des Walter-Schottky-Inst. der Techn. Univ. München
2013
|
| Ausgabe: | 1. Aufl. |
| Schriftenreihe: | Selected Topics of Semiconductor Physics and Technology
160 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | XIV, 154 S. Ill., graph. Darst. |
| ISBN: | 9783941650602 |
Internformat
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| 245 | 1 | 0 | |a Mesoscopic photocurrent flow patterns in a two-dimensional electron gas |c Markus Peter Stallhofer |
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Datensatz im Suchindex
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| adam_text | IMAGE 1
CONTENTS
V
C O N T E N T S
SUMMARY I
Z U S A M M E N F A S S I M G I I I
C O N T E N T S V
L I S T O F F I G U R E S I X
L I S T O F F R E Q U E N T A B B R E V I A T I O N S X I I I
1 I N T R O D U C T I O N 1
2 C O N C E P T S 5
2.1 LOW-DIMENSIONAL ELECTRON SYSTEMS 5
2.1.1 TWO-DIMENSIONAL ELECTRON SYSTEM (2DEG) 5
2.1.2 FURTHER LATERAL QUANTIZATION 7
2.2 ELECTRONIC TRANSPORT IN LOW-DIMENSIONAL SYSTEMS 7
2.2.1 IMPORTANT QUANTITIES IN ELECTRONIC TRANSPORT 7
2.2.2 SCATTERING MECHANISMS 15
2.2.3 ELECTRONIC TRANSPORT WITH PERPENDICULAR MAGNETIC FIELD 19
2.3 SPINTRONICS 27
2.3.1 SPIN RELAXATION TIMESCALES 28
2.3.2 SPIN RELAXATION MECHANISMS 30
2.4 OPTICAL EXCITATION 34
2.4.1 OPTICAL EXCITATION IN LOW-DIMENSIONAL SEMICONDUCTOR STRUCTURES .
34 2.4.2 HOT CHARGE CARRIER DYNAMICS 38
2.5 OPTOELECTRONIC PROPERTIES OF LOW-DIMENSIONAL CIRCUITS 40
3 TECHNOLOGY 4 3
3.1 SAMPLE FABRICATION 44
3.1.1 HETEROSTRUCTURE 44
3.1.2 CLEANROOM PROCESSING 47
HTTP://D-NB.INFO/1031900438
IMAGE 2
VI
CONTENTS
3.1.3 SAMPLE GEOMETRY 50
3.2 MEASUREMENT CIRCUITRY 53
3.2.1 SAMPLE POSITIONING 53
3.2.2 OPTICAL LAYOUT 53
3.2.3 ELECTRONIC CIRCUITRY 55
3.3 OPTICAL BEAM INDUCED CURRENT (OBIC): MEASUREMENT PRINCIPLE . . . .
56 3.3.1 PHOTOGENERATED HOLES: PHOTOCONDUCTIVE GAIN EFFECT 57
3.3.2 PHOTOGENERATED ELECTRONS: QUIISI-BALLISTIC PHOTOCURRENT 59 3.3.3
OFFSET CORRECTION 62
3.3.4 BIAS DEPENDENCE OF THE SPATIALLY RESOLVED OBIC MAPS 64
4 PROPAGATION LENGTH O F OPTICALLY INDUCED CURRENTS 6 9
4.1 INTRODUCTION 70
4.2 EXPERIMENTAL RESULTS 71
4.3 DISCUSSION 80
4.3.1 IMPACT OF INCREASED SCATTERING PHASE SPACE 81
4.3.2 SCREENING EFFECTS 82
4.3.3 FORMATION OF A QUASI-FERMI LEVEL AND RECOMBINATION 83
4.3.4 DISCUSSION OF THERMOELECTRIC EFFECTS 85
4.4 CONCLUSIONS 86
5 MAGNETIC FOCUSING O F OPTICALLY INDUCED CURRENTS 8 7
5.1 INTRODUCTION 88
5.2 EXPERIMENTAL RESULTS 89
5.3 MONTE CARLO SIMULATIONS 97
5.4 DISCUSSION 98
5.4.1 REMOTE AND IONIZED IMPURITIES 99
5.4.2 PHOUONS 99
5.4.3 INTERSUBBAND SCATTERING 100
5.4.4 SPIN-RELATED OR COLLECTIVE PHENOMENA 100
5.4.5 STREAMING MOTION AND CLASSICAL HALL EFFECT 101
5.5 CONCLUSIONS 103
6 OPTICAL EXCITATION O F QUANTUM HALL E D G E STATES 105
6.1 INTRODUCTION 106
6.2 EXPERIMENTAL RESULTS 108
G.2.1 SHUBNIKOV-DE HAAS OSCILLATIONS IN THE PHOTOCURRENT 108
6.2.2 VISUALIZATION OF QUANTUM HALL EDGE STATES 110
0.2.3 DETECTION OF AN OPTICALLY INDUCED SPIN POLARIZATION 116
6.3 CONCLUSION 120
7 CONCLUSION AND OUTLOOK 123
IMAGE 3
CONTENTS VII
A LIST O F DEVICES 127
B CLEAN R O O M PARAMETERS 131
B.L OPTICAL LITHOGRAPHY: MESA 132
B.2 OPTICAL LITHOGRAPHY: OHMIC CONTACTS 132
B.3 OPTICAL LITHOGRAPHY: TOPGNTUS 133
B.4 E-BEAIN LITHOGRAPHY: QUANTUM POINT, CONTACTS 133
B.5 E-BEAIN LITHOGRAPHY: GOLD T.OPGATES 134
C LASER CHARACTERIZATION 135
C.L W A V E L E N G T H TUNING BY OPTICAL INTERFERENCE FILTER 135
C.2 EXCESS ENERGIES 136
C.3 SPOT SIZE 137
C.4 LENGTH CALIBRATION OF THE POSITION READOUT 138
D EXPERIMENTAL DETAILS T O CHAPTER 4 141
E EXPERIMENTAL DETAILS T O CHAPTER 5 145
E . L SPATIALLY RESOLVED OBIC MAPS (RAW DATA) 145
E.2 SIMULATION DETAILS 151
BIBLIOGRAPHY 155
PUBLICATIONS 183
ACKNOWLEDGEMENTS 185
|
| any_adam_object | 1 |
| author | Stallhofer, Markus Peter |
| author_facet | Stallhofer, Markus Peter |
| author_role | aut |
| author_sort | Stallhofer, Markus Peter |
| author_variant | m p s mp mps |
| building | Verbundindex |
| bvnumber | BV040878214 |
| classification_tum | PHY 705d |
| ctrlnum | (OCoLC)835465809 (DE-599)BVBBV040878214 |
| dewey-full | 530.4175 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 530 - Physics |
| dewey-raw | 530.4175 |
| dewey-search | 530.4175 |
| dewey-sort | 3530.4175 |
| dewey-tens | 530 - Physics |
| discipline | Physik |
| edition | 1. Aufl. |
| format | Thesis Book |
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| id | DE-604.BV040878214 |
| illustrated | Illustrated |
| indexdate | 2024-07-10T00:34:30Z |
| institution | BVB |
| isbn | 9783941650602 |
| language | English |
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| physical | XIV, 154 S. Ill., graph. Darst. |
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| series | Selected Topics of Semiconductor Physics and Technology |
| series2 | Selected Topics of Semiconductor Physics and Technology |
| spelling | Stallhofer, Markus Peter Verfasser aut Mesoscopic photocurrent flow patterns in a two-dimensional electron gas Markus Peter Stallhofer 1. Aufl. Garching b. München Verein zur Förderung des Walter-Schottky-Inst. der Techn. Univ. München 2013 XIV, 154 S. Ill., graph. Darst. txt rdacontent n rdamedia nc rdacarrier Selected Topics of Semiconductor Physics and Technology Vol. 160 Zugl.: München, Techn. Univ., Diss., 2012 Photostrom (DE-588)4400572-6 gnd rswk-swf Spinpolarisation (DE-588)4182332-1 gnd rswk-swf Elektronengas (DE-588)4151870-6 gnd rswk-swf Dimension 2 (DE-588)4321721-7 gnd rswk-swf Magnetfeld (DE-588)4074450-4 gnd rswk-swf (DE-588)4113937-9 Hochschulschrift gnd-content Elektronengas (DE-588)4151870-6 s Dimension 2 (DE-588)4321721-7 s Spinpolarisation (DE-588)4182332-1 s Photostrom (DE-588)4400572-6 s Magnetfeld (DE-588)4074450-4 s DE-604 Selected Topics of Semiconductor Physics and Technology 160 (DE-604)BV011499438 160 DNB Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025858034&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Stallhofer, Markus Peter Mesoscopic photocurrent flow patterns in a two-dimensional electron gas Selected Topics of Semiconductor Physics and Technology Photostrom (DE-588)4400572-6 gnd Spinpolarisation (DE-588)4182332-1 gnd Elektronengas (DE-588)4151870-6 gnd Dimension 2 (DE-588)4321721-7 gnd Magnetfeld (DE-588)4074450-4 gnd |
| subject_GND | (DE-588)4400572-6 (DE-588)4182332-1 (DE-588)4151870-6 (DE-588)4321721-7 (DE-588)4074450-4 (DE-588)4113937-9 |
| title | Mesoscopic photocurrent flow patterns in a two-dimensional electron gas |
| title_auth | Mesoscopic photocurrent flow patterns in a two-dimensional electron gas |
| title_exact_search | Mesoscopic photocurrent flow patterns in a two-dimensional electron gas |
| title_full | Mesoscopic photocurrent flow patterns in a two-dimensional electron gas Markus Peter Stallhofer |
| title_fullStr | Mesoscopic photocurrent flow patterns in a two-dimensional electron gas Markus Peter Stallhofer |
| title_full_unstemmed | Mesoscopic photocurrent flow patterns in a two-dimensional electron gas Markus Peter Stallhofer |
| title_short | Mesoscopic photocurrent flow patterns in a two-dimensional electron gas |
| title_sort | mesoscopic photocurrent flow patterns in a two dimensional electron gas |
| topic | Photostrom (DE-588)4400572-6 gnd Spinpolarisation (DE-588)4182332-1 gnd Elektronengas (DE-588)4151870-6 gnd Dimension 2 (DE-588)4321721-7 gnd Magnetfeld (DE-588)4074450-4 gnd |
| topic_facet | Photostrom Spinpolarisation Elektronengas Dimension 2 Magnetfeld Hochschulschrift |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=025858034&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV011499438 |
| work_keys_str_mv | AT stallhofermarkuspeter mesoscopicphotocurrentflowpatternsinatwodimensionalelectrongas |