(1) The document discusses the design of an on-chip optical signal processor for bioinformatics applications using various optical computing techniques.
(2) It proposes using linear group delay waveguides to generate chirped signals and microring resonators for four-wave mixing to perform temporal Fourier transforms and multiplications.
(3) The document also covers the use of metamaterials to design an optical integrator for spatial analog optical computing operations like integration.
This document describes a silicon chip-based time lens that can capture and measure ultrafast optical signals in real time. It works by using a third-order nonlinear optical process called four-wave mixing to impart a quadratic phase shift to an optical signal, analogous to how a spatial lens works. This allows the temporal profile of an optical waveform to be mapped to the spectral domain, where it can be measured with high resolution using a spectrometer. The silicon time lens achieved a resolution of 220 femtoseconds over a recording length of over 100 picoseconds. Integrating such photonics components on a silicon chip paves the way for developing ultracompact, high-performance oscilloscopes and other devices for measuring transient optical and electronic signals
This presentation reviews the following paper:
Crivellaro, Alberto, and Vincent Lepetit. "Robust 3d tracking with descriptor fields." Computer Vision and Pattern Recognition (CVPR), 2014 IEEE Conference on. IEEE, 2014
The document provides an overview of LaTeX, including its history and advantages over other document preparation systems like Microsoft Word. It discusses how to set up LaTeX and write documents, covering topics like document structure, commands, sections, formatting text, mathematical equations, figures, tables, and bibliographies. The overall document serves as a LaTeX tutorial for getting started using the system.
The document discusses using acoustic metamaterials to achieve deep-subwavelength imaging, exceeding the diffraction limit. It describes how a holey metamaterial structure can act as a perfect imaging device by supporting Fabry-Pérot resonant modes that allow transmission of evanescent waves. Experimental results show the metamaterial is capable of resolving acoustic image features smaller than λ/50, with potential applications in crack detection and ultrasound imaging.
This presentation reviews the following paper:
Davenport, Michael L., Sandra Skendžić, Nicolas Volet, Jared C. Hulme, Martijn JR Heck, and John E. Bowers. "Heterogeneous silicon/III–V semiconductor optical amplifiers." IEEE Journal of Selected Topics in Quantum Electronics 22, no. 6 (2016): 78-88.
The document discusses plasmonic nanoantennas and their use in controlling the radiative properties of nanoemitters. It begins with a brief history of plasmonics and defines key concepts like localized surface plasmon resonances and nanoantennas. It then covers topics like the effects of nanoantenna shape and fabrication techniques. Applications discussed include surface-enhanced spectroscopy, fluorescence, solar cells, and nanomedicine. In conclusion, nanoantennas can modify emission properties and provide field enhancement and confinement, enabling applications while fabrication challenges at the nanoscale remain.
This presentation reviews the following paper.
Kippenberg, Tobias J., Ronald Holzwarth, and S. A. Diddams. "Microresonator-based optical frequency combs." Science 332, no. 6029 (2011): 555-559.
Optical Nanoantennas for Multiband Surface-Enhanced Infrared and Raman Spectr...Hossein Babashah
The document describes how linear gold nanoantennas were fabricated using electron beam lithography to support both surface-enhanced infrared spectroscopy (SEIRS) and surface-enhanced Raman spectroscopy (SERS) by engineering the antennas to have plasmonic resonances in both the visible and infrared spectral regions. Measurement of methylene blue adsorbed on the antennas showed SEIRS enhancement factors up to 105 and SERS enhancement from 102 to 103, demonstrating the antennas' ability to enhance signals in both spectral regions from the same structures. Tuning the antenna length allows enhanced signals from multiple vibrational modes across the infrared spectrum from 1280 to 3100 cm-1.
This presentation shows the basics of a volume hologram and its applications.The main focus of this presentation is optical computing using volume hologram. The optical computing schemes used in this presentation are Vundelught filter, joint Fourier transform correlator, and optical neural network.
Design and Analysis of DNA String Matching by Optical Parallel ProcessingHossein Babashah
This is my thesis presentation which is about design and analysis of DNA string matching by optical parallel processing. In this presentation, you will find on how to use optics for faster and more efficient processing.
(1) The document discusses the design of an on-chip optical signal processor for bioinformatics applications using various optical computing techniques.
(2) It proposes using linear group delay waveguides to generate chirped signals and microring resonators for four-wave mixing to perform temporal Fourier transforms and multiplications.
(3) The document also covers the use of metamaterials to design an optical integrator for spatial analog optical computing operations like integration.
This document describes a silicon chip-based time lens that can capture and measure ultrafast optical signals in real time. It works by using a third-order nonlinear optical process called four-wave mixing to impart a quadratic phase shift to an optical signal, analogous to how a spatial lens works. This allows the temporal profile of an optical waveform to be mapped to the spectral domain, where it can be measured with high resolution using a spectrometer. The silicon time lens achieved a resolution of 220 femtoseconds over a recording length of over 100 picoseconds. Integrating such photonics components on a silicon chip paves the way for developing ultracompact, high-performance oscilloscopes and other devices for measuring transient optical and electronic signals
This presentation reviews the following paper:
Crivellaro, Alberto, and Vincent Lepetit. "Robust 3d tracking with descriptor fields." Computer Vision and Pattern Recognition (CVPR), 2014 IEEE Conference on. IEEE, 2014
The document provides an overview of LaTeX, including its history and advantages over other document preparation systems like Microsoft Word. It discusses how to set up LaTeX and write documents, covering topics like document structure, commands, sections, formatting text, mathematical equations, figures, tables, and bibliographies. The overall document serves as a LaTeX tutorial for getting started using the system.
The document discusses using acoustic metamaterials to achieve deep-subwavelength imaging, exceeding the diffraction limit. It describes how a holey metamaterial structure can act as a perfect imaging device by supporting Fabry-Pérot resonant modes that allow transmission of evanescent waves. Experimental results show the metamaterial is capable of resolving acoustic image features smaller than λ/50, with potential applications in crack detection and ultrasound imaging.
This presentation reviews the following paper:
Davenport, Michael L., Sandra Skendžić, Nicolas Volet, Jared C. Hulme, Martijn JR Heck, and John E. Bowers. "Heterogeneous silicon/III–V semiconductor optical amplifiers." IEEE Journal of Selected Topics in Quantum Electronics 22, no. 6 (2016): 78-88.
The document discusses plasmonic nanoantennas and their use in controlling the radiative properties of nanoemitters. It begins with a brief history of plasmonics and defines key concepts like localized surface plasmon resonances and nanoantennas. It then covers topics like the effects of nanoantenna shape and fabrication techniques. Applications discussed include surface-enhanced spectroscopy, fluorescence, solar cells, and nanomedicine. In conclusion, nanoantennas can modify emission properties and provide field enhancement and confinement, enabling applications while fabrication challenges at the nanoscale remain.
This presentation reviews the following paper.
Kippenberg, Tobias J., Ronald Holzwarth, and S. A. Diddams. "Microresonator-based optical frequency combs." Science 332, no. 6029 (2011): 555-559.
Optical Nanoantennas for Multiband Surface-Enhanced Infrared and Raman Spectr...Hossein Babashah
The document describes how linear gold nanoantennas were fabricated using electron beam lithography to support both surface-enhanced infrared spectroscopy (SEIRS) and surface-enhanced Raman spectroscopy (SERS) by engineering the antennas to have plasmonic resonances in both the visible and infrared spectral regions. Measurement of methylene blue adsorbed on the antennas showed SEIRS enhancement factors up to 105 and SERS enhancement from 102 to 103, demonstrating the antennas' ability to enhance signals in both spectral regions from the same structures. Tuning the antenna length allows enhanced signals from multiple vibrational modes across the infrared spectrum from 1280 to 3100 cm-1.
This presentation shows the basics of a volume hologram and its applications.The main focus of this presentation is optical computing using volume hologram. The optical computing schemes used in this presentation are Vundelught filter, joint Fourier transform correlator, and optical neural network.
Design and Analysis of DNA String Matching by Optical Parallel ProcessingHossein Babashah
This is my thesis presentation which is about design and analysis of DNA string matching by optical parallel processing. In this presentation, you will find on how to use optics for faster and more efficient processing.
Design and Analysis of DNA String Matching by Optical Parallel Processing
Space time relations
1. Time-Space Duality
Space
System is linear since Helmholtz equation which U must satisfy is linear.
System is shift invariant since free space is invariant to displacement of the coordinate system.
2 ( )
( , ) ( , ) x yj x y
x y x yh x y H e d d
is impulse response of the LTI system.
2 ( )
( , ) ( , ) x yj x y
x yH h x y e dxdy
is Transfer function of the LTI system.
( ).
2 2 2 2 2
1 1 1
( )
: ( , , )
2 2
0: 2 :
sin ( / ) sin ( ), sin ( / )
: ( , ) ( , ,0)
: (
x y z
k kx y
x y
j k x k y k zjk r
x y z
k x x x k y y
j k x k y
h
h
plane wave U x y z Ae Ae
f
U k U k k k k k
c c
k k k k
harmonic input f x y U x y Ae
harmonic output g
2 2 2
( )
2
2 2 2 2 2
2 2 2 2 2
, ) ( , , )
( , ) ( , ) / ( , )
: 0 0: ( , ) 1
: 0 0:
( ,
x y z
x yz
j k x k y k d
j djk d
x y h h
x y p x y
x y p
x y
x y U x y d Ae
H g x y f x y e e
if Propagating TF H
if Attenuating TF evanescent wave
H
2 ( )
) ( , ) x yj x y
h x y e dxdy
2. Fresnel approximation ( 4
0 )
2 4
2 2 2 2 22 2 2
2 2 2 2 2 2
2
1 2 1 2 (1 ......)2 2 8
4
: 0 0, 0 , ( .)( )
( , )
0
( , )
x yx yz
x y x y x x y y optical axis x y
d d
j d d j jj djk d
x y
x y
f v v like paraxial ray app
H e e e e e
H
2
2 2
22
2 (1 ) 2 2 (2 2 )2
0
x yz
d d d
j j j jkd
jkd j djk d
e e ee He e
We know that
2 2 2 2
/4
,j t j j t
e e e e e
=>by taking IFT:
2 2 2 2
1
2
0
( )(1 )
22 22
( , ) ( , )z
x y k r
jk jjk d
jk d jk
jk
d
d
d d d
x y
jk j
H ee e h x y e e he e
d
For output
2 2
0
2 2 2 2
0
2 2 2 2
0
( ) ( )
2
2 2
2
( )
2 2
( , ) ( , ) ( , ) ( , )
( , ) ( , )
( , ) ( , )
k x x y y
j
d
k x x xx y y yy
j
d
k x y k x y k
j j j xx yy
d d d
g x y f x y h x x y y dx dy f x y h e dx dy
g x y f x y h e dx dy
g x y f x y h e e e dx d
2 2 2 2
0
( )
2 2
( , ) ( , )
k x y k x y k
j j j xx yy
d d d
y
g x y h e f x y e e dx dy
Chirp modulation using lens
2 2
0 1 2
1 12 2 ( 1) ( )
2
0
1 2
1 1
( , ) ( ) ( , )
2
x y
jk n
jkn R R
l l
x y
x y t x y e e
R R
2 2
0 1 2
2 22 2 2 2
0 1 2
0
2 2
0
0
1 1
( 1) ( )
2
1 1
( 1) ( ) ( )
22 2
0
1
(( 1)(
2
0
( , ) ( , ) ( , ) ( , )
( , ) ( , )
( , ) ( , )
x y
jk n
jkn R R
l
x yk x y k x y kjk nj j j xx yy
jkn R Rd d d
k x y nj
jknd
f x y f x y t x y f x y e e
g x y h e f x y e e e e dx dy
g x y h e e f x y e
2 2
1 2
1 1
) ) ( )
2
x y kjk j xx yy
R R d d
e dx dy
3. 2 2
0
0
1 2
2
( )
2 ( )2
0 0
1 1 1 1
( 1)( )
( , ) ( , ) ( , )
,
x y
k x y j xx yyj j x yjkn fd
x y
for n
d R R f
g x y h e e f x y e dx dy f x y e dxdy
x y
f f
Time
2 2
10 0 0 0
0 0
2
0
0 0
2
0
0 0
2 2
0 0
0 0 0
( )
( ) 2 2
( )
2
( )
2
( ) 2 ( ) (
2
( ) ( )
( )
( ) ( ) ( ) ( )
( )
j j
j jj
t
j
j
t
j
j
t t t
j j
j j
H H e e e e e
h t e e
z t x h t d x e e d
x e e d e e
2 2
0 0
0 0 0
2
2 22
0 0
0 0 0 0
2 2
0 0
0 0 0
) ( )
2 2
2
0
( ) ( )
2 22
( ) ( )1
( )
2 2
( )
: ( ) ( )
( ) ( )
( ) ( )
t
j j
t
ja
t t
j j jja
j
t t
j a j j
j
x e e d
chirp modulation x t x t e
z t e x e e e d
z t e x e e
0
2
0 0
0 0 0
0 0
( ) ( )
2
0
0
1 1
( ) ( ) ( )
t t
j j
j j
d
for a f
a
z t e x e d x e d
t
Space time duality
4. 2 2
0
0 0 0
2 2 2 2
( ) ( )
2 2
( )
2 2 2
0
( )
( , )
1 1 1
2
2
dt t
j j
j
x y k r k r
jk j j
jkd jkdd d d
t
t
h t e e Ae
j j
h x y e e e e Be
d d
k
d d d
means that
d
d