We present a new modulation concept for medium infrared (8 - 12 µm) wavelengths. The operation principle of the presented modulator is based on evanescent wave absorption by means of a bulk, single or multiple quantum well structure. A sub-wavelength grating ensures efficient coupling of the optical field to the absorption medium. Modulation is then achieved by depletion of this absorption medium. We present an analysis of concept parameters and point out their respective advantages and disadvantages with respect to the modulation performance. In this context, we investigated the impact of different absorption media as bulk, single and multiple quantum well structures and found that single quantum well structures are best suited for modulation purposes. Simulations pointed out that an absolute modulation depth of the order of 60% can be achieved. We also investigated the impact of the diffraction order on the modulation performance. Furthermore, some preliminary experimental results on this modulation concept are presented and compared with simulations.
Stiens, J, Vandermeiren, W, Shkerdin, G, Kotov, V, De Tandt, C, Ranson, W, Borghs, G & Vounckx, R 2010, Evanescent wave modulator for medium infrared wavelengths (8 – 12 µm). in B Witzigmann, F Henneberger, Y Arakawa & M Osinski (eds), Proceedings of the SPIE - Physics ans Simulations of Optoelectronic Devices XVIII. Proceedings of the SPIE - Physics ans Simulations of Optoelectronic Devices XVIII, SPIE, Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet, Stockholm, Sweden, 21/09/09.
Stiens, J., Vandermeiren, W., Shkerdin, G., Kotov, V., De Tandt, C., Ranson, W., Borghs, G., & Vounckx, R. (2010). Evanescent wave modulator for medium infrared wavelengths (8 – 12 µm). In B. Witzigmann, F. Henneberger, Y. Arakawa, & M. Osinski (Eds.), Proceedings of the SPIE - Physics ans Simulations of Optoelectronic Devices XVIII (Proceedings of the SPIE - Physics ans Simulations of Optoelectronic Devices XVIII). SPIE.
@inproceedings{be2adbe3703649da8ddbe638a2c45b2b,
title = "Evanescent wave modulator for medium infrared wavelengths (8 – 12 µm)",
abstract = "We present a new modulation concept for medium infrared (8 - 12 µm) wavelengths. The operation principle of the presented modulator is based on evanescent wave absorption by means of a bulk, single or multiple quantum well structure. A sub-wavelength grating ensures efficient coupling of the optical field to the absorption medium. Modulation is then achieved by depletion of this absorption medium. We present an analysis of concept parameters and point out their respective advantages and disadvantages with respect to the modulation performance. In this context, we investigated the impact of different absorption media as bulk, single and multiple quantum well structures and found that single quantum well structures are best suited for modulation purposes. Simulations pointed out that an absolute modulation depth of the order of 60% can be achieved. We also investigated the impact of the diffraction order on the modulation performance. Furthermore, some preliminary experimental results on this modulation concept are presented and compared with simulations.",
keywords = "modulator, evanescent wave, quantum well, sub-wavelength grating",
author = "Johan Stiens and Werner Vandermeiren and Gennady Shkerdin and Vladimir Kotov and {De Tandt}, Cathleen and Willy Ranson and Gustaaf Borghs and Roger Vounckx",
note = "Bernd Witzigmann; Fritz Henneberger; Yasuhiko Arakawa; Marek Osinski; Finds and Results from the Swedish Cyprus Expedition: A Gender Perspective at the Medelhavsmuseet ; Conference date: 21-09-2009 Through 25-09-2009",
year = "2010",
month = mar,
day = "11",
language = "English",
isbn = "978-0-8194-7993-8",
series = "Proceedings of the SPIE - Physics ans Simulations of Optoelectronic Devices XVIII",
publisher = "SPIE",
editor = "Bernd Witzigmann and Fritz Henneberger and Yasuhiko Arakawa and Marek Osinski",
booktitle = "Proceedings of the SPIE - Physics ans Simulations of Optoelectronic Devices XVIII",
address = "United States",
}