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• Pros and Cons
• Semiconductor devices -- Si based for electronics, III-V Sand – abundant supply for for light sources
• Pros and Cons
• Semiconductor fibers ?? • Potential Applications
-3 1548.1
11
Experiment Results
optical microscope images
Visual inspection
c
a. Cross section of Si cored fiber b. Lateral view of Si cored fiber c. Lateral view of silicon core
Prior Arts
fabricated by using molten core method fabricated by using CVD
P. J. A. Sazio et al, Southampton university, OE Vol. 20 No.4 (2012)
a few meter long, loss 5~7dB/cm 8
Results and Discussion
crystalline characterization
B.L. Boyce et al., Acta Materialia, vol. 58, pp. 439 (2010) Boundaries can be observed for a- and poly-Si when FE-SEM is used.
• • • • mid-Infrared Nonlinear Silicon photonics Sensing
4
making glass fibers and Si chips, a blessing from Heaven to whom we should be grateful.
• Many unknowns with expected pros and cons
Chil-Chyuan Kuo, J. Russ. Laser Res., vol. 32, pp. 12 (2011) 13
Results and Discussion Raman characterization –
to know possible causes for crystalline
2
Outline
Motivation and Prior Arts Design and Fabrication Experiment Results Discussion Summary
3
Motivation
• Optical fibers are silica based for communication/sensing
ห้องสมุดไป่ตู้
Research Groups Worldwide
• Southampton University • Clemson University • Pen. State University
5
Properties of Semiconductor Fibers
• Optics
Size: a few microns depending on transmission or sensing Low transmission loss
P. J. A. Sazio et al, Southampton university, Nature photonics, Vol. 6 No.174 (2012)
9
Well, Our Prior Arts
Using conventional SMF as preform
pure SiO2 micro fiber
Crystalline, smooth interface or surface
• Doping for light sources
• Rare earth elements
• Electronics
Size: microwire to nanowire Good conductivity
Transmission(dB)
-1
-1.5
-2
-2.5
FSR = 270pm
1548.2 1548.3 1548.4 1548.5 1548.6 1548.7 Wavelength (nm) 1548.8 1548.9 1549
A typical photograph of an MCR whose gaps between adjacent rings are controlled within 1.5 μm.
矽核光纖的製備與光學特性量測 Silicon cored optical fibers – fabrication and optical characterization
報告人：王倫 教授 lon@.tw 2013-07-12
1
Acknowledgement
• Coworkers: Yi-Chuan Tseng, Yan-Bo Huang Prof. Hsuen-Li Chen (Department of Material Science and Engineering) • Monthly discussion with the joint team members from Dr. Ching-Fuh Lin, Dr. Wing-Kit Choi and Dr. Chao-Hsin Wu. • This work is supported by International Collaboration Project with Peking University (Grant No. NTU-ICRP102R7558) • .
15
Thanks for your attention!
• Questions? • Dreams?
16
carrier mobility 1.05 cm2/Vs vs. typical Si FET 10^4-10^5 cm2/Vs relatively easy in control on crystalline direction, roughness and diffusion. loss 3dB/cm Pier J. A. Sazio et al, Southampton University, Science Vol. 311 No. 1583 (2006) 7 11mm long, dia. 100um, core 5um
Crystalline better than poly and amorphous Doping for n- and p-type
• E-O integration: 22nm node and below, placement, etc.
6
Prior Arts
fabricated by using HPCVD
John Ballato et al, Clemson university, OE Vol. 16 No.23 (2008)
Prior Arts
Toward useful junction based devices amorphous p-n junction
OE conversion with a pulsed laser
JLT Vol. 27 No.15 (2009)
Uniqueness: several meters long with below nm surface roughness 10
Micro Coil Rings
Spectrum of 2-ring Coil
0
Resolution: 5pm
-0.5
P. Hashemi et al, University of Tehran, Conference of Microelectronics, pp. 326 (2005)
Summary
• Long Si-cored silica-clad fibers were made. • Their propagation losses were measured, and crystalline properties characterized.
• Semiconductor devices -- Si based for electronics, III-V Sand – abundant supply for for light sources
• Pros and Cons
• Semiconductor fibers ?? • Potential Applications
-3 1548.1
11
Experiment Results
optical microscope images
Visual inspection
c
a. Cross section of Si cored fiber b. Lateral view of Si cored fiber c. Lateral view of silicon core
Prior Arts
fabricated by using molten core method fabricated by using CVD
P. J. A. Sazio et al, Southampton university, OE Vol. 20 No.4 (2012)
a few meter long, loss 5~7dB/cm 8
Results and Discussion
crystalline characterization
B.L. Boyce et al., Acta Materialia, vol. 58, pp. 439 (2010) Boundaries can be observed for a- and poly-Si when FE-SEM is used.
• • • • mid-Infrared Nonlinear Silicon photonics Sensing
4
making glass fibers and Si chips, a blessing from Heaven to whom we should be grateful.
• Many unknowns with expected pros and cons
Chil-Chyuan Kuo, J. Russ. Laser Res., vol. 32, pp. 12 (2011) 13
Results and Discussion Raman characterization –
to know possible causes for crystalline
2
Outline
Motivation and Prior Arts Design and Fabrication Experiment Results Discussion Summary
3
Motivation
• Optical fibers are silica based for communication/sensing
ห้องสมุดไป่ตู้
Research Groups Worldwide
• Southampton University • Clemson University • Pen. State University
5
Properties of Semiconductor Fibers
• Optics
Size: a few microns depending on transmission or sensing Low transmission loss
P. J. A. Sazio et al, Southampton university, Nature photonics, Vol. 6 No.174 (2012)
9
Well, Our Prior Arts
Using conventional SMF as preform
pure SiO2 micro fiber
Crystalline, smooth interface or surface
• Doping for light sources
• Rare earth elements
• Electronics
Size: microwire to nanowire Good conductivity
Transmission(dB)
-1
-1.5
-2
-2.5
FSR = 270pm
1548.2 1548.3 1548.4 1548.5 1548.6 1548.7 Wavelength (nm) 1548.8 1548.9 1549
A typical photograph of an MCR whose gaps between adjacent rings are controlled within 1.5 μm.
矽核光纖的製備與光學特性量測 Silicon cored optical fibers – fabrication and optical characterization
報告人：王倫 教授 lon@.tw 2013-07-12
1
Acknowledgement
• Coworkers: Yi-Chuan Tseng, Yan-Bo Huang Prof. Hsuen-Li Chen (Department of Material Science and Engineering) • Monthly discussion with the joint team members from Dr. Ching-Fuh Lin, Dr. Wing-Kit Choi and Dr. Chao-Hsin Wu. • This work is supported by International Collaboration Project with Peking University (Grant No. NTU-ICRP102R7558) • .
15
Thanks for your attention!
• Questions? • Dreams?
16
carrier mobility 1.05 cm2/Vs vs. typical Si FET 10^4-10^5 cm2/Vs relatively easy in control on crystalline direction, roughness and diffusion. loss 3dB/cm Pier J. A. Sazio et al, Southampton University, Science Vol. 311 No. 1583 (2006) 7 11mm long, dia. 100um, core 5um
Crystalline better than poly and amorphous Doping for n- and p-type
• E-O integration: 22nm node and below, placement, etc.
6
Prior Arts
fabricated by using HPCVD
John Ballato et al, Clemson university, OE Vol. 16 No.23 (2008)
Prior Arts
Toward useful junction based devices amorphous p-n junction
OE conversion with a pulsed laser
JLT Vol. 27 No.15 (2009)
Uniqueness: several meters long with below nm surface roughness 10
Micro Coil Rings
Spectrum of 2-ring Coil
0
Resolution: 5pm
-0.5
P. Hashemi et al, University of Tehran, Conference of Microelectronics, pp. 326 (2005)
Summary
• Long Si-cored silica-clad fibers were made. • Their propagation losses were measured, and crystalline properties characterized.