Miniature Surface Plasmon Polariton Amplitude Modulator by Beat Frequency and Polarization Control

作者：Chang Cheng Wei; Lin Chu En; Yu Chih Jen; Yeh Ting Tso; Yen Ta Jen

来源：Scientific Reports, 2016, 6(1): 32098.

DOI：10.1038/srep32098

The miniaturization of modulators keeps pace for the compact devices in optical applications. Here, we present a miniature surface plasmon polariton amplitude modulator (SPPAM) by directing and interfering surface plasmon polaritons on a nanofabricated chip. Our results show that this SPPAM enables two kinds of modulations. The first kind of modulation is controlled by encoding angular-frequency difference from a Zeeman laser, with a beat frequency of 1.66 MHz; the second of modulation is validated by periodically varying the polarization states from a polarization generator, with rotation frequencies of 0.5-10 k Hz. In addition, the normalized extinction ratio of our plasmonic structure reaches 100. Such miniaturized beat-frequency and polarization-controlled amplitude modulators open an avenue for the exploration of ultrasensitive nanosensors, nanocircuits, and other integrated nanophotonic devices.

• 出版日期2016-8-25
• 单位清华大学; 长春大学