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Course: SS 0013, Fall 2009

School: University of Alabama in H...

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M. Seyed Sadeghi, PhD

Dept. of Physics, University of Alabama in Huntsville Huntsville, Alabama, USA email: abpvsg@r.postjobfree.com

Profile: Designer of semiconductor lasers; experienced in leading research/development teams;

materials designer for semiconductor optical devices (GaAs-, InP-, N-, Si, and Al-compound laser systems; quantum well, wire, and dot, etc); analyzer of the fabrication processes and...

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ph113lecture14

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Course: SS 0013

School: University of Alabama i...

"Physics 113

Lecture 14 Oct. 2

Homework:

Chapter 35 Questions: 35.3, 35.7, 35.11 Problems: 35.10, 35.14, 35.25, 35.37, 35.56, 35.71, 35.107, 35.116

Deadline: Oct. 14 2008

Last lecture Single Slit Diffraction - Minima

In general a sin = m for the m"

ph113lecture19

25 Pages

Course: SS 0013

School: University of Alabama i...

"Lecture 19 Oct. 28

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Find out your way:

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ph113lecture22

15 Pages

Course: SS 0013

School: University of Alabama i...

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Fig. 38-13

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ph113lecture3

10 Pages

Course: SS 0013

School: University of Alabama i...

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Lecture 3, Aug. 26

Announcements:

Marker: Recitation sessions: 1-Thur. 8:15-9:15 pm Grading: Final (40%), Mid(25%), Home Work(25%) Quizzes (10%) Mid term exam: Oct. 23th

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Types Speed Harmonic Superposition Standing

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UAH_EM08_lecture10

19 Pages

Course: SS 0013

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Lecture 10 Sep. 18

September 30 colloquium:

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ph113lecture26

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fourier

5 Pages

Course: EE 426

School: University of Alabama i...

"Table of Fourier Transform Pairs

Function, f(t)

Definition of Inverse Fourier Transform

Fourier Transform, F(w)

Definition of Fourier Transform

1 f (t ) = 2p

f (t - t 0 )

-

F (w )e

jwt

dw

F (w ) =

-

f (t )e

- jwt

dt

F (w )e - jwt0 F"

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6 Pages

Course: EE 420

School: University of Alabama i...

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03/03/09

John Stensby

Appendix 11B: Limit Superior, Limit Inferior and Limit of a Sequence of Sets (Events) If A1 A2 A3 . is a nested increasing sequence of events with

A

n =1

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(11B1)

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Course: EE 448

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Course: EE 448

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Chapter 8

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4 Pages

Course: EE 448

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"EE448/528

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John Stensby

Appendix 4.2: Hermitian Matrices

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15 Pages

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LM a11 a 21 A=M MM M Nam1

a12 L a1n a 22 L a 2 n M M a m 2 L a mn

OP PP PQ

(3-1)

This matrix has m rows and n columns. Ofte"

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M. Seyed Sadeghi, PhD

Dept. of Physics, University of Alabama in Huntsville Huntsville, Alabama, USA email: abpvsg@r.postjobfree.com

Profile: Designer of semiconductor lasers; experienced in leading research/development teams;

materials designer for semiconductor optical devices (GaAs-, InP-, N-, Si, and Al-compound laser systems; quantum well, wire, and dot, etc); analyzer of the fabrication processes and reliability of semiconductor optical devices; hands-on experience in test and performance assessment of semiconductor lasers; hands-on experience in spectroscopic measurements and analysis; prime investigator of nonlinear optics of semiconductors and optical devices based on silicon and lead salt nanostructures.

Educations:

1993-1999 1991-1992 PhD MSc University of British Columbia, Canada University of Toronto, Canada Physics Physics

Skills:

Materials designer/scientist for the design and application semiconductor materials (GaAs-, InP-, N-, Si, and Al-compound laser systems; quantum well, wire, and dot, etc) for lasers and EAM. Designer of visible, near- and mid-infrared semiconductor lasers (ridge and buried heterostructure DFB and FP lasers, electrically and optically pumped lasers, doping schemes, grating, base wafer) and electro-optical devices. Industrial experience in inspection and analysis of fabrication of semiconductor lasers (grating etching, mass transport, doping profile, etc.) Experienced in modeling, simulation, and investigation of optical properties of nanostructures and their assemblies (colloidal quantum dots, metallic nanoparticles, quantum wells, etc.). Experienced in reliability analysis of semiconductor optical devices (failure analysis of lasers with p/n and semi-insulating current blocking structures, analysis of reliability-related material and structural aspects of lasers, etc.) and conducting diagnostic tests and performance assessment of semiconductor lasers. Hands-on experience in using femto-second Titanium: sapphire laser, optical parametric amplifier (OPA), nonlinear crystals, interferometer, lock-in amplifier, hybrid CO2 laser, etc. Experienced in application of photoluminescence, photoluminescence-excitation, and electroluminescence techniques to study optical properties and structural characteristics of semiconductors and optical devices. Experienced in writing technical and scientific reports (authors of more than 32 referred papers in scientific and technical journals). Proficiency in Matlab and Mathematica Management skills

Work experiences: 4/2005-present Senior Research Scientist Department of Electrical and Computer Engineering McMaster University, Canada

Prime investigator for development of:

1 2 3 4

Optical devices based on Er-doped Si nanocrystal systems and lead salt nanostructures.

Novel infrared complex-coupled DFB lasers and tunable optically pumped intersubband lasers. Ultra-fast functional optical filters and time delay lines based on one-dimensional active photonic crystals

Electro-absorption modulators 1

2/2001-4/2005 1

2

3 4 5 6

7

Research Scientist/Materials and laser designer Photonami Corp., Canada Leader of lambda-selector team: 1) Organized and managed a group of scientists for the design and implementation of an amplifier/shutter system. 2) Overseen fabrication process. 3) Wrote code for gain/absorption in thin films. 4) Ran experiments and tests. Designer of semiconductor lasers: 1) Designed FP and complex-coupled DFB lasers (surface and edge emitter). 2) Designed p/n and semi-insulating buried heterostructure and ridge-waveguide lasers 3) Overseen etching, masking, and epitaxial growth processes at each level of laser fabrication. 4) Designed laser chips based on different material systems and applications (highspeed and/or un-cooled lasers). 5) Contributed in making the final decision. Analyzed and evaluated fabrication processes of p/n blocking and semi-insulating buried heterostructure semiconductor lasers using SEM, SIMS, and TEM, mass transport, etc. Analyzed reliability, and performance of complex-coupled DFB and FP lasers (aging of DFB lasers, Zn diffusion, Fe-Zn inter-diffusion, etc.). Investigated/designed monolithic integration of surface emitting DFB lasers with photodetectors and modulators. Provided technical and management supports for the internal and outsource projects. Performed and analyzed spectroscopic measurements on laser chips (diagnostic electroluminescence and photoluminescence analyses of laser chips). Research Associate Department of Physics, University of Toronto

10/1999-2/2001

Selected projects:

Conducted ultra-fast spectroscopic measurements using femto-second Titanium: sapphire laser, optical parametric amplifier (OPA). Introduced a novel technique to use a laser beam to generate photonic crystals. Proposed a new technique to store electrons or excitons in quantum wells using laser-induced nonlinear effects. Conducted two- and three-photon excitations in semiconductors using nonlinear crystals. Set up optical tables for measurement of ultra-short light/semiconductor interaction. Research Assistant Department of Physics, The University of British Columbia

1/1993-10/1999

Predicted and experimentally tested optical Stark effect in the emission of quantum well semiconductors using Nd:YAG and intense CO2 laser pulses. Design of cryogenic systems for spectroscopic studies of semiconductors Set up optical systems for pump-probe measurements Conducted experimental tests and analytical and numerical analyses of interface roughness effects in the interaction of intense infrared laser fields with quantum well semiconductors. 2

Predicted and experimentally tested optical quenching of quantum well emission. Predicted optically induced gain in the conduction intersubband transitions of quantum wells using coherent population trapping of carriers.

Patents: 1. US 6,886,995 "Back reflection insensitive electro-optical interface and a method of coupling

the same to a waveguide". 2. US 2004/0258119 A1 (pending) "Methods and apparatus for suppression of spatial hole in burning second and higher order DFB lasers".

Publications in referred journals:

A. Development of novel semiconductor laser systems and photonic devices: 1 S.M. Sadeghi, W. Li, X. Li, W.-P, Huang, "Tunable infrared semiconductor lasers based on electromagnetically induced optical defects ", IEEE Selected Topics in Quantum Electronics (special issue on semiconductor lasers), submitted (2006) S.M. Sadeghi, W. Li, X. Li, W.-P, Huang, "Coherently tunable infrared distributed feedback lasers", IEEE Journal of Quantum Electronics, vol.42 752(2006) S.M. Sadeghi, W. Li, X. Li, W.-P. Huang, " Purely gain-coupled distributed feedback laser via a bright optical lattice", Applied Physics Letters, vol.88 211111(2006) S.M. Sadeghi, W. Li, X. Li, W.-P. Huang, "Optical switching of one-dimensional photonic band gaps and coherent generation of dark and bright optical lattices in quantum wells," Phys. Rev. B73 035304(2006). S.M. Sadeghi and W. Li, "Electromagnetically-induced distributed feedback intersubband lasers", IEEE Journal of Quantum Electronics, Vol. 41 1227(2005). S.M. Sadeghi and W. Li, "Coherent control of time delay and localized electromagnetic modes in active and passive one-dimensional photonic band gaps", Phys. Rev. B72 165341 (2005).

2 3 4

5 6

B. Experimental/theoretical spectroscopic studies of coherent nonlinear effects in semiconductor quantum wells: 7 8 9 S.M. Sadeghi, J. Meyer, T. Tiedje and M. Beaudoin, "Multi-photon infrared coupling of excitons in quantum well semiconductors'', IEEE J. Quantum Electronic, Vol. 36 No.11 1267(2000). S.M. Sadeghi and J. Meyer, "Layer interface roughness effects in the coherent intraband transitions of excitons in quantum well structures", Phys. Rev. B61 16841(2000). S.M. Sadeghi and J. Meyer, "Optical quantum-confined Stark effect and infrared-induced quenching in the emission spectra of quantum wells", J. of Phys.: Condensed Matter Physics, Vol.12 5801 (2000).

C. Nonlinear optics of quantum well semiconductors: 10 S.M. Sadeghi, "Spatial modulation of electromagnetically induced transparency in quantum wells using monolayer growth islands," IEEE Journal of Selected Topics in Quantum Electronics (special issue in nanophotonics) vol. 12 1275(2006) 11 S.M. Sadeghi, W. Li, X. Li, W.-P, Huang,"Photonics electromagnetically induced transparency and collapse of superradiant modes in Bragg multiple quantum wells," Phys. Rev. B74 (Rapid Communications) 161304R (2006) 12 S.M. Sadeghi, "Amorphous two-dimensional optical lattices with coherently controlled morphologies in quantum well structures", Phys. Rev. B72 125336(2005).

3

13 S.M. Sadeghi and W. Li, "Multi-subband electromagnetically-induced transparency and coherently frozen exciton states in quantum well structures", Phys. Rev. B72 075347(2005). 14 S.M. Sadeghi, W. Li, and H.M. van Driel, "Coherently induced one-dimensional photonic band gap", Phys. Rev. B69 073304(2004) 15 S.M. Sadeghi and W. Li, "Infrared-induced dark states and coherent population trapping of excitons in quantum well structures", Phys. Rev. B69 045311(2004). 16 S.M. Sadeghi and H.M. van Driel, "Coherent control of nonradiative decay of excitons in asymmetric quantum well structures'', Phys. Rev. B63 045316(2001). 17 S.M. Sadeghi, H.M. van Driel, and J.M. Fraser, "Coherent control and enhancement of refractive index in an double n-type quantum well structure'', Phys. Rev. B62 15386(2000). 18 S.M. Sadeghi, S.R. Leffler, and J. Meyer, "Quantum interference and nonlinear optical...

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