Source: http://aoot.osa.org/ome/abstract.cfm?uri=ome-8-6-1435
Timestamp: 2019-04-20 16:51:30+00:00

Document:
Glass-clad, GaSb-core fibers were drawn and subsequently laser annealed. The as-drawn fibers were found to be polycrystalline, possess Sb inclusions, and have oxide contamination concentrations of less than 3 at%. Melting and resolidifying regions in the cores using 10.6 µm CO2 laser radiation yielded single crystalline zones with enhanced photoluminescence (PL), including the first observation of strong room temperature PL from a crystalline core fiber. Annealed fibers show low values of tensile strain and a bandgap close to that of bulk GaSb.
J. Ballato, T. Hawkins, P. Foy, B. Yazgan-Kokuoz, C. McMillen, L. Burka, S. Morris, R. Stolen, and R. Rice, “Advancements in semiconductor core optical fiber,” Opt. Fiber Technol. 16(6), 399–408 (2010).
J. Ballato, T. Hawkins, P. Foy, C. McMillen, R. Stolen, and R. Rice, “Progress in crystalline semiconductor core optical fibers,” in Optical Components and Materials VII, S. Jiang, M. J. F. Digonnet, J. W. Glesener, and J. C. Dries, eds. (SPIE, 2010), Vol. 7598, p. UNSP 759815.
A. C. Peacock, J. R. Sparks, and N. Healy, “Semiconductor optical fibres: progress and opportunities,” Laser Photonics Rev. 8(1), 53–72 (2014).
A. C. Peacock, U. J. Gibson, and J. Ballato, “Silicon optical fibres - past, present, and future,” Adv. Phys. X, 114–127 (2016).
X. Ji, S.-Y. Yu, S. Lei, H. Y. Cheng, S. Chaudhuri, W. Liu, S. Mohney, J. Badding, and V. Gopalan, “Single Crystal Small Core Semiconductor Optical Fibers for All-Fiber Optoelectronics,” in Conference on Lasers and Electro-Optics(2017), Paper SM2K.5 (Optical Society of America, 2017), p. SM2K.5.
N. Healy, S. Mailis, T. D. Day, P. J. Sazio, J. V. Badding, and A. C. Peacock, “Laser Annealing of Amorphous Silicon Core Optical Fibers,” in Advanced Photonics Congress(2012), Paper STu1D.1 (Optical Society of America, 2012), p. STu1D.1.
N. Healy, M. Fokine, Y. Franz, T. Hawkins, M. Jones, J. Ballato, A. C. Peacock, and U. J. Gibson, “CO2 Laser-Induced Directional Recrystallization to Produce Single Crystal Silicon-Core Optical Fibers with Low Loss,” Adv. Opt. Mater. 4(7), 1004–1008 (2016).
E. F. Nordstrand, A. N. Dibbs, A. J. Eraker, and U. J. Gibson, “Alkaline oxide interface modifiers for silicon fiber production,” Opt. Mater. Express 3(5), 651–657 (2013).
F. H. Suhailin, N. Healy, Y. Franz, M. Sumetsky, J. Ballato, A. N. Dibbs, U. J. Gibson, and A. C. Peacock, “Kerr nonlinear switching in a hybrid silica-silicon microspherical resonator,” Opt. Express 23(13), 17263–17268 (2015).
A. C. Peacock, J. Campling, A. F. J. Runge, H. Ren, L. Shen, O. Aktas, P. Horak, N. Healy, U. J. Gibson, and J. Ballato, “Wavelength Conversion and Supercontinuum Generation in Silicon Optical Fibers,” IEEE J. Sel. Top. Quantum Electron. 24(3), 1–9 (2018).
P. Mehta, N. Healy, T. D. Day, J. R. Sparks, P. J. A. Sazio, J. V. Badding, and A. C. Peacock, “All-optical modulation using two-photon absorption in silicon core optical fibers,” Opt. Express 19(20), 19078–19083 (2011).
R. He, T. D. Day, M. Krishnamurthi, J. R. Sparks, P. J. A. Sazio, V. Gopalan, and J. V. Badding, “Silicon p-i-n Junction Fibers,” Adv. Mater. 25(10), 1461–1467 (2013).
F. A. Martinsen, B. K. Smeltzer, M. Nord, T. Hawkins, J. Ballato, and U. J. Gibson, “Silicon-core glass fibres as microwire radial-junction solar cells,” Sci. Rep. 4(1), 6283 (2015).
A. C. Peacock and N. Healy, “Semiconductor optical fibres for infrared applications: A review,” Semicond. Sci. Technol. 31(10), 103004 (2016).
A. Gumennik, E. C. Levy, B. Grena, C. Hou, M. Rein, A. F. Abouraddy, J. D. Joannopoulos, and Y. Fink, “Confined in-fiber solidification and structural control of silicon and silicon-germanium microparticles,” Proc. Natl. Acad. Sci. U.S.A. 114(28), 7240–7245 (2017).
N. D. Orf, O. Shapira, F. Sorin, S. Danto, M. A. Baldo, J. D. Joannopoulos, and Y. Fink, “Fiber draw synthesis,” Proc. Natl. Acad. Sci. U.S.A. 108(12), 4743–4747 (2011).
D. A. Coucheron, M. Fokine, N. Patil, D. W. Breiby, O. T. Buset, N. Healy, A. C. Peacock, T. Hawkins, M. Jones, J. Ballato, and U. J. Gibson, “Laser recrystallization and inscription of compositional microstructures in crystalline SiGe-core fibres,” Nat. Commun. 7, 13265 (2016).
J. R. Sparks, R. He, N. Healy, M. Krishnamurthi, A. C. Peacock, P. J. A. Sazio, V. Gopalan, and J. V. Badding, “Zinc Selenide Optical Fibers,” Adv. Mater. 23(14), 1647–1651 (2011).
P. J. A. Sazio, J. R. Sparks, R. He, M. Krishnamurthi, T. C. Fitzgibbons, S. Chaudhuri, N. F. Baril, A. C. Peacock, N. Healy, V. Gopalan, and J. V. Badding, “Templated growth of II-VI semiconductor optical fiber devices and steps towards infrared fiber lasers,” Solid State Lasers Xxiv Technol. Devices 9342, 93420A (2015).
C. Hou, X. Jia, L. Wei, A. M. Stolyarov, O. Shapira, J. D. Joannopoulos, and Y. Fink, “Direct atomic-level observation and chemical analysis of ZnSe synthesized by in situ high-throughput reactive fiber drawing,” Nano Lett. 13(3), 975–979 (2013).
J. Ballato, T. Hawkins, P. Foy, C. McMillen, L. Burka, J. Reppert, R. Podila, A. M. Rao, and R. R. Rice, “Binary III-V semiconductor core optical fiber,” Opt. Express 18(5), 4972–4979 (2010).
B. L. Scott and G. R. Pickrell, “Fabrication of GaSb optical fibers,” in Processing and Properties of Advanced Ceramics and Composites V: Ceramic Transactions (John Wiley & Sons, 2013), Vol. 240, p. 65.
S. Song, N. Healy, U. Österberg, M. Fokine, T. Sørgård, A. Peacock, U. J. Gibson, and U. J. Gibson, “GaSb-core Optical Fibers,” in Frontiers in Optics 2017 (Optical Society of America, 2017), p. JW4A.117.
Y. Mizokawa, O. Komoda, and S. Miyase, “Long-time air oxidation and oxide-substrate reactions on GaSb, GaAs and GaP at room temperature studied by X-ray photoelectron spectroscopy,” Thin Solid Films 156(1), 127–143 (1988).
N. Healy, S. Mailis, N. M. Bulgakova, P. J. A. Sazio, T. D. Day, J. R. Sparks, H. Y. Cheng, J. V. Badding, and A. C. Peacock, “Extreme electronic bandgap modification in laser-crystallized silicon optical fibres,” Nat. Mater. 13(12), 1122–1127 (2014).
M. Fokine, A. Theodosiou, S. Song, T. Hawkins, J. Ballato, K. Kalli, and U. J. Gibson, “Laser structuring, stress modification and Bragg grating inscription in silicon-core glass fibers,” Opt. Mater. Express 7(5), 1589–1597 (2017).
R. A. Noack and W. B. Holzapfel, “Photoluminescence of GaSb under hydrostatic pressure,” Solid State Commun. 28(2), 177–179 (1978).
E. T. R. Chidley, S. K. Haywood, A. B. Henriques, N. J. Mason, R. J. Nicholas, and P. J. Walker, “Photoluminescence of GaSb grown by metal-organic vapour phase epitaxy,” Semicond. Sci. Technol. 6(1), 45–53 (1991).
M. Wu and C. Chen, “Photoluminescence of high‐quality GaSb grown from Ga‐ and Sb‐rich solutions by liquid‐phase epitaxy,” J. Appl. Phys. 72(9), 4275–4280 (1992).
Fig. 1 a) Scanning electron micrograph of the core of a GaSb fiber. The brighter diagonal stripe within the dashed circle is elemental Sb, as shown by the intensity of the Sb Raman line at 150 cm−1 (inset). b) Overview of EDS linescan area; the brittle core leads to some texture. c) EDS linescan (counts) across the glass-core interface, showing segregation of Ga.
Fig. 2 a) Optical microscopy image of the Raman-excitation laser spot on the fiber core, showing as-drawn material with Sb striations near the image bottom, and uniform material after laser annealing, above. b) Raman spectrum of as-drawn (black) and annealed (red) regions of GaSb in Duran glass cladding. c) Raman scan from as-drawn to annealed region.
Fig. 3 X-ray diffractogram from a) as-drawn and b) annealed regions of a GaSb fiber, showing formation of single crystal GaSb. Inset shows the change in azimuthal angle (Δϕ) for a given diffraction spot when translating along the annealed fiber. Index-only labels are for GaSb.
Fig. 4 Room temperature photoluminescence (PL) of as-drawn and annealed portions of the GaSb-core fiber. The as-drawn data is scaled up by a factor of 10 and has the background subtracted to ease comparison of curve shapes.

References: V. 
 V. 
 V. 
 V. 
 V. 
 V. 
 V. 
 V. 
 V. 
 V.