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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 6 — Mar. 12, 2012
  • pp: 6003–6009

Large aperture asymmetric Fabry Perot modulator based on asymmetric tandem quantum well for low voltage operation

Byung Hoon Na, Gun Wu Ju, Hee Ju Choi, Yong Chul Cho, Yong Hwa Park, and Yong Tak Lee  »View Author Affiliations


Optics Express, Vol. 20, Issue 6, pp. 6003-6009 (2012)
http://dx.doi.org/10.1364/OE.20.006003


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Abstract

Large aperture image modulators used as demodulator in receiver path are an important component for the use in three dimensional (3D) image sensing. For practical applications, low voltage operation and high modulation performance are the key requirements for modulators. Here, we propose an asymmetric Fabry-Perot modulator (AFPM) with asymmetric tandem quantum wells (ATQWs) for 3D image sensing. By using ATQWs for the AFPM design, the device operated at −4.25V, and the operating voltage was significantly lower by about 23% compared to −5.5V of a conventional AFPM with 8nm thick multiple QW with a single QW thickness (SQWs), while achieving high reflectivity modulation in excess of 50%. The performance of the fabricated devices is in good agreement with theoretical calculations. The pixelated device shows a high modulation speed of 21.8 MHz over a large aperture and good uniformity. These results show that AFPM with ATQWs is a good candidate as an optical image modulator for 3D image sensing applications.

© 2012 OSA

OCIS Codes
(100.6890) Image processing : Three-dimensional image processing
(230.2090) Optical devices : Electro-optical devices
(230.4110) Optical devices : Modulators
(230.4205) Optical devices : Multiple quantum well (MQW) modulators

ToC Category:
Optical Devices

History
Original Manuscript: January 18, 2012
Revised Manuscript: February 18, 2012
Manuscript Accepted: February 18, 2012
Published: February 27, 2012

Citation
Byung Hoon Na, Gun Wu Ju, Hee Ju Choi, Yong Chul Cho, Yong Hwa Park, and Yong Tak Lee, "Large aperture asymmetric Fabry Perot modulator based on asymmetric tandem quantum well for low voltage operation," Opt. Express 20, 6003-6009 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-6-6003


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