Ultrafast All‐Optical Switching of Germanium‐Based Flexible Metaphotonic Devices
Source abstract
Abstract
Abstract Incorporating semiconductors as active media into metamaterials offers opportunities for a wide range of dynamically switchable/tunable, technologically relevant optical functionalities enabled by strong, resonant light–matter interactions within the semiconductor. Here, a germanium‐thin‐film‐based flexible metaphotonic device for ultrafast optical switching of terahertz radiation is experimentally demonstrated. A resonant transmission modulation depth of 90% is achieved, with an ultrafast full recovery time of 17 ps. An observed sub‐picosecond decay constant of 670 fs is attributed to the presence of trap‐assisted recombination sites in the thermally evaporated germanium film.
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Research context
OpenAlex topics: Photonic and Optical Devices · Terahertz technology and applications · Plasmonic and Surface Plasmon Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
Centre for Disruptive Photonic Technologies The Photonics Institute Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
Optoelectronics Research Centre and Centre for Photonic Metamaterials University of Southampton Southampton SO17 1BJ UK
Funding
Ministry of Education - Singapore · Engineering and Physical Sciences Research Council
References (50)
Show source-provided references
1. 10.1126/science.109679610.1126/science.1096796 ↗
2. 10.1126/science.110537110.1126/science.1105371 ↗
3. 10.1002/lpor.20100004310.1002/lpor.201000043 ↗
4. 10.1109/JPHOT.2009.202628810.1109/JPHOT.2009.2026288 ↗
5. 10.1126/science.109402510.1126/science.1094025 ↗
6. 10.1103/PhysRevLett.99.14740110.1103/PhysRevLett.99.147401 ↗
7. 10.1038/nmat281010.1038/nmat2810 ↗
8. 10.1364/OE.19.00631210.1364/OE.19.006312 ↗
9. 10.1109/TTHZ.2013.228549810.1109/TTHZ.2013.2285498 ↗
10. 10.1038/nphoton.2008.8210.1038/nphoton.2008.82 ↗
11. 10.1073/pnas.110191010810.1073/pnas.1101910108 ↗
12. 10.1038/nmat316110.1038/nmat3161 ↗
13. 10.1364/OPN.20.10.00002210.1364/OPN.20.10.000022 ↗
14. 10.1016/j.mattod.2014.07.01010.1016/j.mattod.2014.07.010 ↗
15. 10.1002/adma.20160335510.1002/adma.201603355 ↗
16. 10.1103/PhysRevB.87.16110410.1103/PhysRevB.87.161104 ↗
17. 10.1103/PhysRevB.79.16110210.1103/PhysRevB.79.161102 ↗
18. 10.1103/PhysRevLett.106.03740310.1103/PhysRevLett.106.037403 ↗
19. 10.1038/nphoton.2008.5210.1038/nphoton.2008.52 ↗
20. 10.1364/OL.32.00162010.1364/OL.32.001620 ↗
21. 10.1109/TTHZ.2013.228561910.1109/TTHZ.2013.2285619 ↗
22. 10.1038/s41467-017-00019-310.1038/s41467-017-00019-3 ↗
23. 10.1063/1.316851010.1063/1.3168510 ↗
24. 10.1103/PhysRevLett.96.10740110.1103/PhysRevLett.96.107401 ↗
25. 10.1038/nature0534310.1038/nature05343 ↗
26. 10.1063/1.335554410.1063/1.3355544 ↗
27. 10.1002/adma.20130058810.1002/adma.201300588 ↗
28. 10.1063/1.495322810.1063/1.4953228 ↗
29. 10.1063/1.295667510.1063/1.2956675 ↗
30. 10.1103/PhysRevLett.103.14740110.1103/PhysRevLett.103.147401 ↗
31. 10.1364/OL.36.00123010.1364/OL.36.001230 ↗
32. 10.1002/adma.20160588110.1002/adma.201605881 ↗
33. 10.1021/nl302610v10.1021/nl302610v ↗
34. 10.1088/0268-1242/22/7/01210.1088/0268-1242/22/7/012 ↗
35. 10.1063/1.479264910.1063/1.4792649 ↗
36. 10.1038/srep2764310.1038/srep27643 ↗
37. 10.1021/nn404739b10.1021/nn404739b ↗
38. 10.3788/COL20090704.027110.3788/COL20090704.0271 ↗
39. 10.1109/JLT.2016.263230110.1109/JLT.2016.2632301 ↗
40. 10.1038/nphoton.2008.9910.1038/nphoton.2008.99 ↗
41. 10.1364/OE.20.01131610.1364/OE.20.011316 ↗
42. 10.1038/nature1067810.1038/nature10678 ↗
43. 10.1002/adom.20140038610.1002/adom.201400386 ↗
44. 10.1038/nature0881310.1038/nature08813 ↗
45. 10.1126/sciadv.160278310.1126/sciadv.1602783 ↗
46. 10.1038/srep4049210.1038/srep40492 ↗
47. 10.1038/ncomms1573410.1038/ncomms15734 ↗
48. 10.1038/ncomms215310.1038/ncomms2153 ↗
49. 10.1039/C7NR01512G10.1039/C7NR01512G ↗
50. 10.1063/1.299206710.1063/1.2992067 ↗