Multiresonant broadband optical antennas as efficient tunable nanosources of second harmonic light
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
External organisations
- Imperial College London
- National University of Singapore
Abstract
We report the experimental realization of efficient tunable nanosources of second harmonic light with individual multiresonant log-periodic optical antennas. By designing the nanoantenna with a bandwidth of several octaves, simultaneous enhancement of fundamental and harmonic fields is observed over a broad range of frequencies, leading to a high second harmonic conversion efficiency, together with an effective second order susceptibility within the range of values provided by widespread inorganic crystals. Moreover, the geometrical configuration of the nanoantenna makes the generated second harmonic signal independent from the polarization of the fundamental excitation. These results open new possibilities for the development of efficient integrated nonlinear nanodevices with high frequency tunability.
Details
| Original language | English |
|---|---|
| Pages (from-to) | 4997-5002 |
| Number of pages | 6 |
| Journal | Nano Letters |
| Volume | 12 |
| Issue number | 9 |
| Publication status | Published - 12 Sep 2012 |
Keywords
- broadband optical antenna, field enhancement, nanoantenna, nonlinear optics, Plasmonic, second harmonic generation