Characterizing InGaAs quantum dot chains Tyler Park John Colton Jeff Farrer Ken Clark Jeff Farrer Ken Clark David Meyer Scott Thalman Haeyeon Yang APS.

Slides:

Advertisements

Similar presentations

Room Temperature Tunneling Behaviors of Boron Nitride Nanotubes Functionalized with Gold Quantum Dots CNMS User Project Highlight Scientific Achievement.

Advertisements

Photoreflectance of Semiconductors Tyler A. Niebuhr.

Catalysis and Catalysts - TEM and SEM Principles of Electron Microscopy (EM)  Resolution strongly dependent of wavelength: –electron microscope: about.

Lecture 11. Microscopy. Optical or light microscopy involves passing visible light transmitted through or reflected from the sample through a single or.

Saeedeh Ghaffari Nanofabrication Fall 2011 April 15 1.

J.S. Colton, ODMR of self-assembled InAs QDs Optically-Detected Electron Spin Resonance of Self-Assembled InAs Quantum Dots Talk for APS March Meeting,

Electron Microscopy for Catalyst Characterization Dr. King Lun Yeung Department of Chemical Engineering Hong Kong University of Science and Technology.

Groups: WA 2,4,5,7. History  The electron microscope was first invented by a team of German engineers headed by Max Knoll and physicist Ernst Ruska in.

GaAs band gap engineering by colloidal PbS quantum dots Bruno Ullrich Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Cuernavaca,

David Gershoni The Physics Department, Technion-Israel Institute of Technology, Haifa, 32000, Israel and Joint Quantum Institute, NIST and University of.

Magneto-optical study of InP/InGaAs/InP quantum well B. Karmakar, A.P. Shah, M.R. Gokhale and B.M. Arora Tata Institute of Fundamental Research Mumbai,

©2005 David LavoDiagnosis & FA Case Study1 Fault Diagnosis & Failure Analysis Case Study David Lavo January 13, 2005.

Activities during UK-Japan Young Scientist Workshop Dr Riz Khan Room 31DJ02, x6062, Advanced Technology Institute University.

Quantum Dot NanoCavity Emission Tuned by a Circular Photonic Crystal Lattice CNR-INFM Lecce (Italy) National Nanotechnology Lab Web:

Numerical study of transport properties of carbon nanotubes Dhanashree Godbole Brian Thomas Summer Materials Research Training Oakland University 2006.

Quantum Dots. Optical and Photoelectrical properties of QD of III-V Compounds. Alexander Senichev Physics Faculty Department of Solid State Physics

Quantum Dots: Confinement and Applications

Modeling of Energy States of Carriers in Quantum Dots

Time-Correlated Single Photon Counting (TCSPC) Scott Thalman Brigham Young University Advisor: Dr. John Colton Dr Haeyeon Yang USU Physics Help from Mitch.

Optical properties and carrier dynamics of self-assembled GaN/AlGaN quantum dots Ashida lab. Nawaki Yohei Nanotechnology 17 (2006)

Tyler Park John Colton Haeyeon Yang* Jeff Farrer

NanotechnologyNanoscience Modeling and Simulation Develop models of nanomaterials processing and predict bulk properties of materials that contain nanomaterials.

InAs on GaAs self assembled Quantum Dots By KH. Zakeri sharif University of technology, Spring 2003.

Optical Characterization of GaN-based Nanowires : From Nanometric Scale to Light Emitting Devices A-L. Bavencove*, E. Pougeoise, J. Garcia, P. Gilet, F.

PbSe Nanocrystals (NCs) -from synthesis to applications- by Razvan-Ionut Stoian Oklahoma State University, Department of Physics Motivation General properties.

Electron Microscopes Used to count individual atoms What can electron microscopes tell us? Morphology – Size and shape Topography – Surface features (roughness,

T. Smoleński 1, M. Goryca 1,2, T. Kazimierczuk 1, J. A. Gaj 1, P. Płochocka 2, M. Potemski 2,P. Wojnar 3, P. Kossacki 1,2 1. Institute of Experimental.

M. Ahmad Kamarudin, M. Hayne, R. J. Young, Q. D. Zhuang, T. Ben, and S. I. Molina Tuning the properties of exciton complexes in self- assembled GaSb/GaAs.

Technion – Israel Institute of Technology Physics Department and Solid State Institute Eilon Poem, Stanislav Khatsevich, Yael Benny, Illia Marderfeld and.

Slide # 1 ELCT 774: Advanced Semiconductor Characterization Dr. Goutam Koley Room 3A12, , Lecture Hours: Mon.

1 Materials Science Laboratory, Department of Physics, College of Science, Az Zulfi, Majmaah University, KSA.

Optical Characterization methods Rayleigh scattering Raman scattering transmission photoluminescence excitation photons At a glance  Transmission: “untouched”

16/1-13MENA3100 Probes used for analysis PhotonElectronNeutron Waves/particles UiOIFE Wave length Monochromatic Amplitude and phase Coherence.

Other modes associated with SEM: EBIC

Slide # 1 ELCT 774: Advanced Semiconductor Characterization Dr. Goutam Koley Room 3A12, , Lecture Hours: Mon.

Materials World Network: Understanding & controlling optical excitations in individual hybrid nanostructures Gregory J. Salamo, University of Arkansas,

TEM charcaterization Basic modes – Bright field microscopy – Dark field Microscopy –STEM – EDAX – EELS.

Reminders for this week Homework #4 Due Wednesday (5/20) Lithography Lab Due Thursday (5/21) Quiz #3 on Thursday (5/21) – In Classroom –Covers Lithography,

Today –Homework #4 Due –Scanning Probe Microscopy, Optical Spectroscopy –11 am NanoLab Tour Tomorrow –Fill out project outline –Quiz #3 in regular classroom.

Temperature behaviour of threshold on broad area Quantum Dot-in-a-Well laser diodes By: Bhavin Bijlani.

Tyler Park Jeffrey Farrer John Colton Haeyeon Yang APS March Meeting 2012, Boston.

Scanning capacitance microscopy

Microscopia de Iones y Nano-Tecnología Eduardo H. Montoya Rossi.

Characterization of Nanomaterials…

FNI 2A Tools1 Tools of Nanoscience Microscopy  Optical  Electron SEM TEM  Scanning Probe STM AFM NSOM Spectroscopy  Electromagnetic  Mass  Electron.

CAREER: Synthesis and Electronic/Electrical Properties of Carbon Nanotube Junctions Wenzhi LiFlorida International UniversityDMR One of the objectives.

Radiation effects in nanostructures: Comparison of proton irradiation induced changes on Quantum Dots and Quantum Wells.* R. Leon and G. M. Swift Jet Propulsion.

Photoluminescence spectroscopy and transmission electron microscopy imaging of InGaAs quantum dot chains Tyler Park Kenneth Clark David Meyer.

MRS, 2008 Fall Meeting Supported by DMR Grant Low-Frequency Noise and Lateral Transport Studies of In 0.35 Ga 0.65 As/GaAs Studies of In 0.35 Ga.

Daniel Craft, Dr. John Colton, Tyler Park, Phil White, Brigham Young University.

J.S. Colton, Universal scheme for opt.-detected T 1 measurements Universal scheme for optically- detected T 1 measurements (…and application to an n =

Substrate dependence of self-assembled quantum dots

Electron Microscope. How do they work Instead of using light they fire a beam of electrons (which have a wavelength less than 1nm compared to light which.

Characterization of Nanomaterials 1- Scanning Electron Microscopy (SEM) It is one of the most widely used techniques in the characterization of the morphology,

Investigation of the Performance of Different Types of Zirconium Microstructures under Extreme Irradiation Conditions E.M. Acosta, O. El-Atwani Center.

Semiconducting  -FeSi 2 Presented by Srujana Aramalla.

Topic 1 Microscopes and Microscopy. Light Microscopes  How do they work?  Optical magnification  Images pass through a lens or a series of lenses 

Personal background Beng (Hons) Electrical and Electronics Engineering, Malaysia MSc Electrical and Electronics majoring in Photonics, Malaysia.

Work package 3: Materials for energy

Synthesis and Characterization of ZnO-CdS Core-Shell Nanohybrids by Thermal Decomposition Method and Studies on Their Charge Transfer Characteristics Rama.

Characterizing Multilayer Thin films

Optical and Terahertz Spectroscopy of CdSe/ZnS Quantum Dots

Introduction - characterization of materials.

Searching for One of Nature’s Missing Crystal Structures

Annealing effects on photoluminescence spectra of

Student: Chandler Bernard Mentor: Dr. Joseph Herzog (PHYS)

T1 spin lifetimes in n-doped quantum wells and dots

Nanocharacterization (III)

Nanocharacterization (II)

Entangling Atoms with Optical Frequency Combs

Presentation transcript:

Characterizing InGaAs quantum dot chains Tyler Park John Colton Jeff Farrer Ken Clark Jeff Farrer Ken Clark David Meyer Scott Thalman Haeyeon Yang APS 4CS New Mexico Institute of Mining and Technology Socorro, NM October 26-27, 2012

Outline  Quantum dot (QD) overview  Quantum dot growth  Photoluminescence (PL) spectroscopy  Transmission electron microscopy  Results

Quantum Dots Overview  QD Overview  QD Growth  PL Spectroscopy  TEM  Results Charge carriers constrained in 3 dimensions Quantum well constrained in 1 dimension, quantum wires constrained in 2 Many uses: optoelectronics, detectors, lasers, quantum computing…

Quantum Dots Overview  QD Overview  QD Growth  PL Spectroscopy  TEM  Results (photon) h e-e- Excite electrons across bandgap Excite electrons across bandgap “Trap” electrons in well/QD until they relax “Trap” electrons in well/QD until they relax Released photons correspond to bandgap energy Released photons correspond to bandgap energy

Quantum Dots Overview  QD Overview  QD Growth  PL Spectroscopy  TEM  Results

Quantum Dots Overview  QD Overview  QD Growth  PL Spectroscopy  TEM  Results Dong Jun Kim and Haeyon Yang, Nanotechnology,(2008). Zh. M. Wang, et al., Journal of Applied Physics, (2006). 110

Quantum Dot Growth  QD Overview  QD Growth  PL Spectroscopy  TEM  Results InGaAs Modified Stranski-Krastanov technique QD layer grown at a cooler temperature Annealing process, during which QDs form Capping layer for electronic/optical uses

Photoluminescence Spectroscopy  QD Overview  QD Growth  PL Spectroscopy  TEM  Results Detector Lenses Monochromator Lock-in Amplifier Laser Chopper Cryostat Sample

Photoluminescence Spectroscopy  QD Overview  QD Growth  PL Spectroscopy  TEM  Results capped, annealed at 460  C capped, annealed at 460  C, 480  C, and 500  C

Transmission Electron Microscopy  QD Overview  QD Growth  PL Spectroscopy  TEM  Results Preparation: Scanning electron microscope (SEM) / Focused Ion Beam (FIB) Mechanical thinning

Transmission Electron Microscopy  QD Overview  QD Growth  PL Spectroscopy  TEM  Results Cross-sectional and plan view cuts Analytical transmission electron microscopy (chemical analysis) Partial electron energy-loss spectroscopy (PEELS) X-ray energy dispersive spectroscopy (XEDS)

Transmission Electron Microscopy  QD Overview  QD Growth  PL Spectroscopy  TEM  Results

Transmission Electron Microscopy  QD Overview  QD Growth  PL Spectroscopy  TEM  Results

Results and Conclusion  QD Overview  QD Growth  PL Spectroscopy  TEM  Results Obtained optical and physical information about the quantum dot chains Found the effect of the capping layer in the quantum dot samples Investigating quantum dot chain samples with slightly different growth properties Working with different methods to obtain plan view cuts Special thanks to: Felipe Rivera, Thomas McConkie, and Richard Vanfleet