|
|
Design and fabrication of compact Ge-on-SOI coupling structure |
Jianfeng GAO, Junqiang SUN(), Heng ZHOU, Jialin JIANG, Yang ZHOU |
Wuhan National Laboratory for Optoelectronics, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China |
|
|
Abstract In this paper, we have proposed and demonstrated a simple approach to fabricate vertical integrated structure for coupling between active germanium (Ge) waveguide and silicon-on-insulator (SOI) waveguide. The active Ge waveguide is sputtered after etching the underlying passive silicon (Si) waveguide. This method scuttles away from the difficulty involved in the waveguide fabrication by avoiding the etching process for the Ge waveguide, and thereby the waveguide quality is improved. The influences of the coupling structural parameters on the coupling loss are analyzed and discussed. The optimizing parameters are obtained for the fabrication. The minimal coupling loss is experimentally measured about 2.37 dB, and variation tendency of coupling loss against the structural parameters is consistent with the theoretical result. The proposed approach offers an effective path for vertical coupling between Ge and SOI optical components.
|
Keywords
taper coupler
integrated optics device
guided waves
silicon-on-insulator (SOI) waveguide
germanium (Ge) waveguide
active Ge device
Ge-on-SOI coupling structure
|
Corresponding Author(s):
Junqiang SUN
|
Just Accepted Date: 12 September 2018
Online First Date: 31 October 2018
Issue Date: 16 September 2019
|
|
1 |
J Liu, X Sun, R Camacho-Aguilera, L C Kimerling, J Michel. Ge-on-Si laser operating at room temperature. Optics Letters, 2010, 35(5): 679–681
https://doi.org/10.1364/OL.35.000679
pmid: 20195317
|
2 |
S Ren, Y Rong, S A Claussen, R K Schaevitz, T I Kamins, J S Harris, D A B Miller. Ge/SiGe quantum well waveguide modulator monolithically integrated with SOI waveguides. IEEE Photonics Technology Letters, 2012, 24(6): 461–463
https://doi.org/10.1109/LPT.2011.2181496
|
3 |
J Liu, D Pan, S Jongthammanurak, K Wada, L C Kimerling, J Michel. Design of monolithically integrated GeSi electro-absorption modulators and photodetectors on a SOI platform. Optics Express, 2007, 15(2): 623–628
https://doi.org/10.1364/OE.15.000623
pmid: 19532284
|
4 |
P Dong, A G Kirk. Compact double-grating coupler between vertically stacked silicon-on-insulator waveguides. Applied Optics, 2005, 44(35): 7540–7547
https://doi.org/10.1364/AO.44.007540
pmid: 16363778
|
5 |
Z Lu. Efficient fiber-to-waveguide coupling through the vertical leakage from a microring. Optics Letters, 2007, 32(19): 2861–2863
https://doi.org/10.1364/OL.32.002861
pmid: 17909598
|
6 |
V Vusirikala, S S Saini, R E Bartolo, S Agarwala, R D Whaley, F G Johnson, D R Stone, M Dagenais. 1.55-mm InGaAsP-InP laser arrays with integrated-mode expanders fabricated using a single epitaxial growth. IEEE Journal of Quantum Electronics, 1997, 3(6): 1332–1343
https://doi.org/10.1109/2944.658787
|
7 |
M Lamponi, S Keyvaninia, C Jany, F Poingt, F Lelarge, G de Valicourt, G Roelkens, D Van Thourhout, S Messaoudene, J M Fedeli, G H Duan. Low-threshold heterogeneously integrated InP/SOI laser with a double adiabatic taper coupler. IEEE Photonics Technology Letters, 2012, 24(1): 76–78
https://doi.org/10.1109/LPT.2011.2172791
|
8 |
J F Bauters, M L Davenport, M J R Heck, J K Doylend, A Chen, A W Fang, J E Bowers. Silicon on ultra-low-loss waveguide photonic integration platform. Optics Express, 2013, 21(1): 544–555
https://doi.org/10.1364/OE.21.000544
pmid: 23388948
|
9 |
H Zhou, J Sun, J Gao, J Jiang, Y Zhou. Design of compact and efficient polarization-insensitive taper coupler for SiGe photonic integration. Optics Express, 2016, 24(21): 23784–23797
https://doi.org/10.1364/OE.24.023784
pmid: 27828215
|
10 |
M S Kwon, J S Shin, S Y Shin, W G Lee. Characterizations of realized metal-insulator-silicon-insulator-metal waveguides and nanochannel fabrication via insulator removal. Optics Express, 2012, 20(20): 21875–21887
https://doi.org/10.1364/OE.20.021875
pmid: 23037337
|
11 |
J Liu, M Beals, A Pomerene, S Bernardis, R Sun, J Cheng, L C Kimerling, J Michel. Waveguide-integrated, ultra-low energy GeSi electro-absorption modulators. Nature Photonics, 2008, 2(7): 433–437
https://doi.org/10.1038/nphoton.2008.99
|
12 |
J Gao, J Sun, J Jiang, H Zhou, Y Zhou. Design and analysis of electro-absorption modulators with uniaxially stressed Ge/SiGe multiple quantum wells. Optics Express, 2017, 25(10): 10874–10884
https://doi.org/10.1364/OE.25.010874
pmid: 28788775
|
13 |
D Feng, S Liao, P Dong, N Feng, H Liang, D Zheng, C Kung, J Fong, R Shafiiha, J Cunningham, A V Krishnamoorthy, M Asghari. High-speed Ge photodetector monolithically integrated with large cross-section silicon-on-insulator waveguide. Applied Physics Letters, 2009, 95(26): 261105
https://doi.org/10.1063/1.3279129
|
14 |
O Fidaner, A K Okyay, J E Roth, R K Schaevitz, Y H Kuo, K C Saraswat, J S Harris, D A B Miller. Ge-SiGe quantum-well waveguide photodetectors on silicon for the near-infrared. IEEE Photonics Technology Letters, 2007, 19(20): 1631–1633
https://doi.org/10.1109/LPT.2007.904929
|
15 |
E D Palik. Handbook of Optical Constants of Solids. New York: Academic Press, 1985
|
16 |
C W Lee, M K Chin, M K Iyer, A Popov. Asymmetric waveguides vertical couplers for polarization-independent coupling and polarization modes splitting. Journal of Lightwave Technology, 2005, 23(4): 1818–1827
https://doi.org/10.1109/JLT.2005.844490
|
17 |
C W Lee. A review of polarization dependence applications for asymmetric waveguides vertical couplers in compound semiconductor indium phosphide. International Journal of Optics, 2011, 2011: 164023
https://doi.org/10.1155/2011/164023
|
18 |
A Gassenq, K Guilloy, G Osvaldo Dias, N Pauc, D Rouchon, J M Hartmann, J Widiez, S Tardif, F Rieutord, J Escalante, I Duchemin, Y M Niquet, R Geiger, T Zabel, H Sigg, J Faist, A Chelnokov, V Reboud, V Calvo. 1.9% bi-axial tensile strain in thick germanium suspended membranes fabricated in optical germanium-on-insulator substrates for laser applications. Applied Physics Letters, 2015, 107(19): 191904
https://doi.org/10.1063/1.4935590
|
19 |
D S Sukhdeo, D Nam, J H Kang, M L Brongersma, K C Saraswat. Direct bandgap germanium-on-silicon inferred from 5.7% 〈100〉 uniaxial tensile strain. Photonics Research, 2014, 2(3): A8–A13
https://doi.org/10.1364/PRJ.2.0000A8
|
20 |
J M Fedeli, L D Cioccio, D Marris-Morini, L Vivien, R Orobtchouk, P Rojo-Romeo, C Seassal, F. Mandorio Development of silicon photonics devices using microelectronic tools for the integration on top of a CMOS wafer. Advances in Optical Technologies 2008, 2008: 412518
https://doi.org/10.1155/2008/412518
|
21 |
H C Liu, Y H Lin, W Hsu. Sidewall roughness control in advanced silicon etch process. Microsystem Technologies, 2003, 10(1): 29–34
https://doi.org/10.1007/s00542-003-0309-8
|
22 |
Ü Sökmen, A Stranz, S Fündling, S Merzsch, R Neumann, H H Wehmann, E Peiner, A Waag. shallow and deep dry etching of silicon using ICP cryogenic reactive ion etching process. Microsystem Technologies, 2010, 16(5): 863–870
https://doi.org/10.1007/s00542-010-1035-7
|
23 |
T Okada, J Fujimori, M Aida, M Fujimura, T Yoshizawa, M Katsumura, T Iida. Enhanced resolution and groove-width simulation in cold development of ZEP520A. Journal of Vacuum Science & Technology B Microelectronics and Nanometer Structures, 2011, 29(2): 021604
|
24 |
D Pudiš, L Šušlik, I Kubicová, J Škriniarová, I Martinček. Advanced optical methods for patterning of photonic structures in photoresist, III–V semiconductors and PMMA. In: Proceedings of 17th Slovak-Czech-Polish Optical Conference on Wave and Quantum Aspects of Contemporary Optics. 2010, 774608
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|