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Published on: September 26, 2014
Mid-infrared doping tunable transmission through subwavelength metal hole arrays on InSb
B S Passmore1, D G Allen, S R Vangala
1Sandia National Laboratories, Albuquerque, NM 87185, USA. bspassm@sandia.gov
Abstract:
Doping-tunable mid-infrared extraordinary transmission is demonstrated from a periodic metal hole array patterned on n-InSb. The polarization-dependent transmission was measured at room temperature and 77 K. In addition, the extraordinary transmission was measured for incident angles from 0 degrees to 35 degrees in 5 degrees steps. A fundamental resonance shift of approximately 123 cm-1 (1.4 microm) is observed by varying the doping from 1 x 10(16) to 2 x 10(18) cm(-3). The calculated transmission resonances were in good agreement with the experimental results. This suggests that InSb semiconductor-based plasmonic structures may be suitable for a variety of tunable mid-infrared device applications.
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