NEW FREQUENCY GENERATION WITH METALLIC NANOANTENNAS ON AS

2

SE

3

Hüseyin Duman

1,2,*

, Murat C. Kılınç

2,3

, Bihter Dağlar

1,2

, Tural Khudiyev

1,2

and Mehmet Bayındır

1,2,4

1 UNAM-National Nanotechnology Research Center, Bilkent University, Ankara 06800, Turkey 2 Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey 3 ASELSAN, Etlik, Ankara 06011, Turkey 4 Department of Physics, Bilkent University, Ankara 06800, Turkey

*[email protected]

NANOANTENNAS SIMULATION

Nanoantennas can transrecieve UV-VIS-IR light resonantly opening up new possibilities in;  Optical tweezers  Surface enhanced raman spectroscopy (SERS)    High-sensitivity detectors High-density optical data storage High-harmonic generation Nanoantenna on nanometer scale detector L. Tang

et. al.

Nat. Photonics (2008) Bow tie nanoantenna array S.Kim

et. al.

Nature (2008) Optical tweezer by dipole nanoantenna M. L. Juan

et. al.

Nat. Photonics (2011)

NEW FREQUENCY GENERATION

New freaquency generation for;     All optical signal processing Broadband lasers Quantum metrology Single molecule spectroscopy All optical chip illisturation IBM (2011)

STRUCTURE AND THEORY

Incident light;  λ = 1500 nm  TM polarized Resonance;  Antenna length  Source wavelength  Substrate dielectricity Excitation intensity;  Threshold for nonlinear effects  High intensity, broad spectrum Metallic nanoantenna;  Free electron resonance  Electric field enhancement  Length: 190 nm  Width and height: 50 nm

FABRICATION

Electric field enhancement;  High depth, less enhancement  High intensity, broad spectrum Stripe gold nanoantenna array fabricated by FIB Dipole gold nanoantenna array fabricated by FIB

REFERENCES

P. Muhlschlegel

et al

., Science

308

, 1607 (2005).

E. Cubukcu

et al. ,

Applied Physics Letters

89

, 0931201(2006).

D. Yoem

et al. ,

Optics Letters

33

, No.7 660 (2008) H. Duman

et al.

, Applied Physics Letters, Submitted (2011).

Nonlinear substrate;  High χ (3)  Continuum generation   Third harmonic generation Electron oscillation

200 nm

Stripe gold nanoantennas fabricated by chemical reduction Anodized Aluminium Oxide membrane

CONCLUSION

 We demonstrate that the near field enhancement of the resonant optical nanoantenna lowers the required large incident electric field for optical nonlinear effects.

 We achieved more than 500 nm spectral broadening.

We showed that a small distance, about 30 nm, is enough to observe nonlinear effects,compared to nanowires.

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