An integrated optical modulator operating at cryogenic temperatures
Source abstract
Abstract
Photonic integrated circuits (PICs) operating at cryogenic temperatures are fundamental building blocks required to achieve scalable quantum computing and cryogenic computing technologies1,2. Silicon PICs have matured for room-temperature applications, but their cryogenic performance is limited by the absence of efficient low-temperature electro-optic modulation. Here we demonstrate electro-optic switching and modulation from room temperature down to 4 K by using the Pockels effect in integrated barium titanate (BaTiO3) devices3. We investigate the temperature dependence of the nonlinear optical properties of BaTiO3, showing an effective Pockels coefficient of 200 pm V-1 at 4 K. The fabricated devices show an electro-optic bandwidth of 30 GHz, ultralow-power tuning that is 109 times more efficient than thermal tuning, and high-speed data modulation at 20 Gbps. Our results demonstrate a missing component for cryogenic PICs, removing major roadblocks for the realization of cryogenic-compatible systems in the field of quantum computing, supercomputing and sensing, and for interfacing those systems with instrumentation at room temperature.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Photonic and Optical Devices · Advanced Fiber Laser Technologies · Photorefractive and Nonlinear Optics
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References (30)
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1. Silverstone, J. W., Bonneau, D., O’Brien, J. L. & Thompson, M. G. Silicon quantum photonics. IEEE J. Sel. Top. Quantum Electron. 22, 6700113 (2016).10.1109/JSTQE.2016.2573218 ↗
2. O’Brien, J. L., Furusawa, A. & Vučković, J. Photonic quantum technologies. Nat. Photon. 3, 687–695 (2009).10.1038/nphoton.2009.229 ↗
3. Abel, S. et al. Large Pockels effect in micro- and nanostructured barium titanate integrated on silicon. Nat. Mater. 18, 42–47 (2019).10.1038/s41563-018-0208-0 ↗
4. Mukhanov, O. A. Energy-efficient single flux quantum technology. IEEE Trans. Appl. Supercond. 21, 760–769 (2011).10.1109/TASC.2010.2096792 ↗
5. Ladd, T. D. et al. Quantum computing. Nature 464, 45–53 (2010).10.1038/nature08812 ↗
6. Zeghbroeck, B. Van Optical data communication between Josephson-junction circuits and room-temperature electronics. IEEE Trans. Appl. Supercond. 3, 2881–2884 (1993).10.1109/77.234002 ↗
7. Kimble, H. J. The quantum internet. Nature 453, 1023–1030 (2008).10.1038/nature07127 ↗
8. Javerzac-Galy, C. et al. On-chip microwave-to-optical quantum coherent converter based on a superconducting resonator coupled to an electro-optic microresonator. Phys. Rev. A 94, 053815 (2016).10.1103/PhysRevA.94.053815 ↗
9. Greganti, C., Roehsner, M. C., Barz, S., Morimae, T. & Walther, P. Demonstration of measurement-only blind quantum computing. New J. Phys. 18, 303–309 (2016).10.1088/1367-2630/18/1/013020 ↗
10. Mehta, K. K. et al. Integrated optical addressing of an ion qubit. Nat. Nanotechnol. 11, 1066–1070 (2016).10.1038/nnano.2016.139 ↗
11. Johnston, A. R. et al. Optical links for cryogenic focal plane array readout. Opt. Eng. 33, 2013–2019 (1994).10.1117/12.169726 ↗
12. Dowell, J. D. et al. Optoelectronic Analogue Signal Transfer for LHC Detectors CERN/DRDC-91-41 (CERN, 1991).
13. Benea-Chelmus, I.-C., Settembrini, F. F., Scalari, G. & Faist, J. Electric field correlation measurements on the electromagnetic vacuum state. Nature 568, 202–206 (2019).10.1038/s41586-019-1083-9 ↗
14. Elshaari, A. W., Zadeh, I. E., Jöns, K. D. & Zwiller, V. Thermo-optic characterization of silicon nitride resonators for cryogenic photonic circuits. IEEE Photon. J. 8, 2701009 (2016).10.1109/JPHOT.2016.2561622 ↗
15. Gehl, M. et al. Operation of high-speed silicon photonic micro-disk modulators at cryogenic temperatures. Optica 4, 374–382 (2017).10.1364/OPTICA.4.000374 ↗
16. Harris, N. C. et al. Efficient, compact and low loss thermo-optic phase shifter in silicon. Opt. Express 22, 83–85 (2014).10.1364/OE.22.010487 ↗
17. Li, Y., Humphreys, P. C., Mendoza, G. J. & Benjamin, S. C. Resource costs for fault-tolerant linear optical quantum computing. Phys. Rev. X 5, 41007 (2015).
18. Pintus, P. et al. Characterization of heterogeneous InP-on-Si optical modulators operating between 77 K and room temperature. APL Photon. 4, 100805 (2019).10.1063/1.5120046 ↗
19. Alexander, K. et al. Nanophotonic Pockels modulators on a silicon nitride platform. Nat. Commun. 9, 3444 (2018).10.1038/s41467-018-05846-6 ↗
20. Wang, C. et al. Integrated lithium niobate electro-optic modulators operating at CMOS-compatible voltages. Nature 562, 101–104 (2018).10.1038/s41586-018-0551-y ↗
21. Eltes, F. et al. Low-loss BaTiO3-Si waveguides for nonlinear integrated photonics. ACS Photon. 3, 1698–1703 (2016).10.1021/acsphotonics.6b00350 ↗
22. Herzog, C., Poberaj, G. & Günter, P. Electro-optic behavior of lithium niobate at cryogenic temperatures. Opt. Commun. 281, 793–796 (2008).10.1016/j.optcom.2007.10.031 ↗
23. Lauermann, M. et al. 40 GBd 16QAM signaling at 160 Gb/s in a silicon-organic hybrid modulator. J. Light. Technol. 33, 1210–1216 (2015).10.1109/JLT.2015.2394211 ↗
24. Eltes, F. et al. A BaTiO3-based electro-optic Pockels modulator monolithically integrated on an advanced silicon photonics platform. J. Lightwave Technol. 37, 1456–1462 (2019).10.1109/JLT.2019.2893500 ↗
25. Kay, H. F. & Vousden, P. XCV. Symmetry changes in barium titanate at low temperatures and their relation to its ferroelectric properties. Lond. Edinb. Dublin Phil. Mag. J. Sci. 40, 1019–1040 (1949).10.1080/14786444908561371 ↗
26. He, F. & Wells, B. O. Lattice strain in epitaxial BaTiO3 thin films. Appl. Phys. Lett. 88, 152908 (2006).10.1063/1.2194231 ↗
27. Tenne, D. A. et al. Absence of low-temperature phase transitions in epitaxial BaTiO3 thin films. Phys. Rev. B 69, 2–6 (2004).10.1103/PhysRevB.69.174101 ↗
28. Bernasconi, P., Zgonik, M. & Gunter, P. Temperature dependence and dispersion of electro-optic and elasto-optic effect in perovskite crystals. J. Appl. Phys. 78, 2651–2658 (1995).10.1063/1.360126 ↗
29. Acosta, M. et al. BaTiO3-based piezoelectrics: fundamentals, current status, and perspectives. Appl. Phys. Rev. 4, 041305 (2017).10.1063/1.4990046 ↗
30. Pfeiffer, M. H. P. et al. Ultra-smooth silicon nitride waveguides based on the Damascene reflow process: fabrication and loss origins. Optica 5, 884–892 (2018).10.1364/OPTICA.5.000884 ↗