Deformable grating optical modulator.

Area of Science:

• Optoelectronics
• Microelectromechanical Systems (MEMS)

Background:

• Traditional light modulators face limitations in speed and power consumption.
• Micromachined phase gratings offer potential for high-performance optical modulation.

Purpose of the Study:

• To introduce and characterize a new deformable grating modulator (DGM).
• To demonstrate the DGM's capability for efficient light modulation with low power requirements.

Main Methods:

• Development of a DGM based on electrically controlled micromachined phase gratings.
• Characterization of device performance, including switching voltage, bandwidth, and contrast ratio.
• Fabrication of smaller DGM devices for higher performance evaluation.

Main Results:

• The DGM achieves a 1.8 MHz bandwidth and 3.2 V switching voltage.
• Demonstrated modulation with 16 dB contrast ratio.
• Smaller devices show potential for bandwidths up to 6.1 MHz and switching voltages below 10 V.

Conclusions:

• The deformable grating modulator represents a significant advancement in light modulation technology.
• The DGM's low switching voltage and high bandwidth are suitable for various optoelectronic applications.
• Further development of smaller DGMs promises even higher performance and broader applicability.