Baylam, I., Cizmeciyan, M.N., Ozharar, S., Polat, E.O., Kocabas, C. and Sennaroglu, A. (2014) Femtosecond pulse generation with voltage-controlled graphene saturable absorbers. Optics Letters, 39(17), pp. 5180-5183. (doi: 10.1364/OL.39.005180) (PMID:25166104)
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Abstract
We report, for the first time to our knowledge, the demonstration of a graphene supercapacitor as a voltage-controlled saturable absorber for femtosecond pulse generation from a solid-state laser. By applying only a few volts of bias, the Fermi level of the device could be shifted to vary the insertion loss, while maintaining a sufficient level of saturable absorption to initiate mode-locked operation. The graphene supercapacitor was operated at bias voltages of 0.5–1V to generate sub-100 fs pulses at a pulse repetition rate of 4.51 MHz from a multipass-cavity Cr4+:forsterite laser operating at 1255 nm. The nonlinear optical response of the graphene supercapacitor was further investigated by using pump–probe spectroscopy.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Polat, Dr Emre Ozan |
Authors: | Baylam, I., Cizmeciyan, M.N., Ozharar, S., Polat, E.O., Kocabas, C., and Sennaroglu, A. |
Subjects: | Q Science > QC Physics |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Optics Letters |
Publisher: | Optical Society of America |
ISSN: | 0146-9592 |
ISSN (Online): | 1539-4794 |
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