Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/66060
Title: | Electrical tunability due to coalescence of exceptional points in parity-time symmetric waveguides | Authors: | Wang, J Dong, HY Wu, RPH Mok, TC Fung, KH |
Issue Date: | 2017 | Publisher: | Optical Society of America | Source: | Optics letters, 2017, v. 42, no. 3, p. 535-538 How to cite? | Journal: | Optics letters | Abstract: | We demonstrate theoretically the electric tunability due to the coalescence of exceptional points in PT-symmetric waveguides bounded by imperfect conductive layers. Owing to the competition effect of multimode interaction, multiple exceptional points and PT phase transitions could be attained in such a simple system, and their occurrences are strongly dependent on the boundary conductive layers. When the conductive layers become very thin, it is found that the oblique transmittance and reflectance of the same system can be tuned between zero and one by a small change in the carrier density. The results may provide an effective method for fast tuning and modulation of optical signals through electrical gating. | URI: | http://hdl.handle.net/10397/66060 | ISSN: | 0146-9592 | EISSN: | 1539-4794 | DOI: | 10.1364/OL.42.000535 |
Appears in Collections: | Journal/Magazine Article |
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