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Guided nanophotonic devices and
applications
Christiano J. S. de Matos
MackGraphe - Graphene and Nano-Materials Research C...
•  MackGraphe
•  Previous work
–  Fibers with coated/functionalized surfaces
–  Plasmonic and nonlinear waveguides
•  Curr...
Mackenzie
•  A brand new research center
dedicated to the investigation of
the properties of graphene and
other nano-materials with
...
Start up funding
5
MackGraphe
Fapesp : US$ 5.000.000,00.
Instituto Presbiteriano Mackenzie:
US$ 10.000.000,00.
MackPesquis...
Eunézio	
  A	
  de	
  Souza	
  
(Thoroh)	
  
	
  
Christiano	
  J.S.	
  de	
  
Matos	
  
Juan	
  Alfredo	
  
Guevara	
  Ca...
•  MackGraphe initiated its activities in 2012, with
the aim to carry out graphene synthesis,
characterization, and device...
Previous work
8
Fibers with coated/functionalized
surfaces
Fiber tips with carbon
nanotube films
10
•  Mode locking fiber lasers with C nanotube
saturable absorbers extensively stud...
11
•  Mode-locked laser design and film
optimization
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
1
2
3
4
5
6
7
8
9
10
11
αL product
Ba...
12
•  Mode-locked fiber laser characterization
1540 1545 1550 1555 1560 1565 1570
0.0
0.2
0.4
0.6
0.8
1.0
1.2
NormalizedIn...
13
•  Layer-by-layer electrostatic deposition
PAH (+)
Congo
red (-)
32-nm thick polymer film deposited
by layer-by-layer m...
Polymer-coated inner walls
•  Modes guided by anti-resonance in a hollow-
core PCF
600 620 640 660 680 700 720 740 760 780...
Plasmonic and nonlinear
optical waveguides
15
Electrically-controlled phase-matched
frequency conversion in a microring
•  Frequency conversion via four-wave mixing (3r...
Electrically-controlled phase-matched
frequency conversion in a microring
•  Here: quasi-phase-matched second harmonic
gen...
Electrically-controlled phase-matched
frequency conversion in a microring
•  Unlike with four wave mixing, frequency
conve...
Preform with gold nanoparticles
Plasmon excitation in optical fibers
containing gold nanoparticles
•  A fiber has been fab...
Plasmon excitation in optical fibers
containing gold nanoparticles
•  Mach-Zehnder Interferometer
•  Cross-phase modulatio...
Current focus and interests
21
All-waveguide integrated devices based on
nonlinear and plasmonic effects in graphene and
g...
Graphene assets for
photonic applications
22
•  Highly transparent (97.3 % transmission) while
highly absorptive
•  Absorp...
Current projects and interests
•  Four wave mixing in graphene on the tip of a fiber
23
B. Xu et al., IEEE Photon. Technol...
Current projects and interests
•  Saturable absorption, nonlinear optics and
plasmonics in graphene next to a waveguide
24...
Acknowledgments
•  Team @ Mackgraphe
–  Ivan Hernandez Romano
–  Daniel Lopez Cortes
–  Rafael E. P. de Oliveira
–  Rodrig...
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Guided nanophotonic devices and applications - Christiano de Matos

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Guided nanophotonic devices and applications - Christiano de Matos

  1. 1. Guided nanophotonic devices and applications Christiano J. S. de Matos MackGraphe - Graphene and Nano-Materials Research Center Mackenzie Presbyterian University http://www.mackenzie.br/mackgrafe.html cjsdematos@mackenzie.br
  2. 2. •  MackGraphe •  Previous work –  Fibers with coated/functionalized surfaces –  Plasmonic and nonlinear waveguides •  Current research focus and interests •  Acknowledgments Outline 2
  3. 3. Mackenzie
  4. 4. •  A brand new research center dedicated to the investigation of the properties of graphene and other nano-materials with an applied engineering thinking. 4 MackGraphe •  Strong collaboration with the industry expected
  5. 5. Start up funding 5 MackGraphe Fapesp : US$ 5.000.000,00. Instituto Presbiteriano Mackenzie: US$ 10.000.000,00. MackPesquisa: US$ 400.000,00 CNPq: US$ 400.000,00
  6. 6. Eunézio  A  de  Souza   (Thoroh)     Christiano  J.S.  de   Matos   Juan  Alfredo   Guevara  Carrió   Guilhermino  Fachine     Mauro  Terence     Leila  Figueiredo  de   Miranda     Jairo  José  Pedrotti     Anamaria  Dias   Pereira  Alexiou   Maura  Vincenza   Rossi     Antonio  Helio  de   Castro  Neto   (Visiting  Professor)       Chemistry Materials Engineering Electric Eng. and Physics Visiting Professor Dario Bahamon Hugo L. Fragnito UNICAMP External professor Lucia Saito 6 MackGraphe’s Faculty Sergio Domingues
  7. 7. •  MackGraphe initiated its activities in 2012, with the aim to carry out graphene synthesis, characterization, and device development, with special attention to photonic devices. 7 MackGraphe
  8. 8. Previous work 8
  9. 9. Fibers with coated/functionalized surfaces
  10. 10. Fiber tips with carbon nanotube films 10 •  Mode locking fiber lasers with C nanotube saturable absorbers extensively studied •  A micropipette was used to deposit a polymer film containing nanotubes 20 µm thickness achieved
  11. 11. 11 •  Mode-locked laser design and film optimization 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1 2 3 4 5 6 7 8 9 10 11 αL product Bandwidth(nm) (a)   Erbium-doped fiber Polarization controller WDM coupler Signal Isolator 24% output coupler CNT Saturable absorber sample R. M. Gerosa et al., IEEE Photon. Technol. Lett. 25, 1007 (2013) Fiber tips with carbon nanotube films
  12. 12. 12 •  Mode-locked fiber laser characterization 1540 1545 1550 1555 1560 1565 1570 0.0 0.2 0.4 0.6 0.8 1.0 1.2 NormalizedIntensity Wavelength (nm) ΔλFWHM = 10.2 nm -2 -1 0 1 2 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 NormalizedIntensity Time delay (ps) actual pulsewidth = 364 fs Fiber tips with carbon nanotube films R. M. Gerosa et al., IEEE Photon. Technol. Lett. 25, 1007 (2013)
  13. 13. 13 •  Layer-by-layer electrostatic deposition PAH (+) Congo red (-) 32-nm thick polymer film deposited by layer-by-layer method (4 Congo Red/PAH bilayers) R. E. P. de Oliveira et al., JOSA B, 2012 Polymer-coated inner walls
  14. 14. Polymer-coated inner walls •  Modes guided by anti-resonance in a hollow- core PCF 600 620 640 660 680 700 720 740 760 780 800 -30 -20 -10 0 NormalizedTransmission(dB) Wavelength (nm) 14 R. E. P. de Oliveira et al., JOSA B, 2012
  15. 15. Plasmonic and nonlinear optical waveguides 15
  16. 16. Electrically-controlled phase-matched frequency conversion in a microring •  Frequency conversion via four-wave mixing (3rd order NL effect) in microressonators is actively studied nowadays •  The application of a DC field enables second- harmonic or sum/difference freq. generation (2nd order NL effect) •  However, phase-matching is required for efficient conversion 16
  17. 17. Electrically-controlled phase-matched frequency conversion in a microring •  Here: quasi-phase-matched second harmonic generation is numerically obtained in a silicon nitride microring ressonator 17! !
  18. 18. Electrically-controlled phase-matched frequency conversion in a microring •  Unlike with four wave mixing, frequency conversion can be actively switched on and off 18!
  19. 19. Preform with gold nanoparticles Plasmon excitation in optical fibers containing gold nanoparticles •  A fiber has been fabricated containing gold ions •  Gold nanoparticle nucleation is induced by heating •  Absorption due to plasmon resonance can be observed and can be exploited for nonlinear optical devices 19 Before nucleation After nucleation
  20. 20. Plasmon excitation in optical fibers containing gold nanoparticles •  Mach-Zehnder Interferometer •  Cross-phase modulation: 1550 nm signal and 660nm resonant pump (10 mW CW) •  Thermal response (µs response time) 201546 1548 1550 1552 1554 -87 -86 -85 -84 -83 -82 -81 dBm Wavelength [nm] n2 = 7x10-15 m²/W
  21. 21. Current focus and interests 21 All-waveguide integrated devices based on nonlinear and plasmonic effects in graphene and graphene-like materials
  22. 22. Graphene assets for photonic applications 22 •  Highly transparent (97.3 % transmission) while highly absorptive •  Absorption is saturable •  Flat broadband absorption can be electrically switched off •  Highly nonlinear (n2 ~ 108 times higher than that of silica) •  Promising plasmonic properties (high carrier mobility)
  23. 23. Current projects and interests •  Four wave mixing in graphene on the tip of a fiber 23 B. Xu et al., IEEE Photon. Technol. Lett. 24, 1792 (2012) 1000 1050 1100 1150 -70 -60 -50 -40 -30 -20 -10 0 Com grafeno Sem grafeno Potêncianormalizada(dB) Comprimento de onda (nm) 6,8 dB
  24. 24. Current projects and interests •  Saturable absorption, nonlinear optics and plasmonics in graphene next to a waveguide 24 W. Li et al., Nano Lett. 14, 955 (2014)
  25. 25. Acknowledgments •  Team @ Mackgraphe –  Ivan Hernandez Romano –  Daniel Lopez Cortes –  Rafael E. P. de Oliveira –  Rodrigo M. Gerosa –  Tamiris G. Suarez –  Priscila Romagnoli –  Paulo Justino –  Charles Miranda –  Robson A. Colares –  Gerson Kazumi Sinohara –  Julio Freitas 25 •  Main Collaborators –  Prof. Walter Margulis (ACREO-Sweden) –  Prof. Michael Fokine (KTH-Sweden) –  Prof. F. Lazaro Freire (PUC-Rio – Brazil) –  Prof. A. H. Castro Neto (NUS – Singapore) –  Prof. Marcos A. Pimenta (UFMG – Brazil) –  Prof. Gustavo Wiederhecker (Unicamp – Brazil) •  Financial support: FAPESP, CNPq, FINEP, Mackpesquisa

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