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      Graphene-gold supercapacitor as a voltage controlled saturable absorber for femtosecond pulse generation

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      Author(s)
      Baylam, I.
      Balci, O.
      Kakenov, N.
      Kocabas, C.
      Sennaroglu, A.
      Date
      2016-02
      Source Title
      Optics Letters
      Print ISSN
      0146-9592
      Publisher
      Optical Society of America
      Volume
      41
      Issue
      5
      Pages
      910 - 913
      Language
      English
      Type
      Article
      Item Usage Stats
      213
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      311
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      Abstract
      We report, for the first time to the best of our knowledge, use of a graphene-gold supercapacitor as a voltage controlled fast saturable absorber for femtosecond pulse generation. The unique design involving only one graphene electrode lowers the insertion loss of the device, in comparison with capacitor designs with two graphene electrodes. Furthermore, use of the high-dielectric electrolyte allows reversible, adjustable control of the absorption level up to the visible region with low bias voltages of only a few volts (0-2 V). The fast saturable absorber action of the graphene-gold supercapacitor was demonstrated inside a multipass-cavity Cr:forsterite laser to generate nearly transform-limited, sub-100 fs pulses at a pulse repetition rate of 4.51 MHz at 1.24 μm.
      Keywords
      Capacitors
      Electrodes
      Electrolytes
      Electromagnetic pulse
      Gold
      Graphene
      Graphite electrodes
      Pulse repetition rate
      Saturable absorbers
      Ultrashort pulses
      Absorption levels
      Capacitor design
      Cr : Forsterite laser
      Femtosecond pulse generation
      Graphene electrodes
      High dielectrics
      Low bias voltage
      Voltage-controlled
      Pulse generators
      Permalink
      http://hdl.handle.net/11693/36864
      Published Version (Please cite this version)
      https://doi.org/10.1364/OL.41.000910
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      • Department of Physics 2550
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