Next Article in Journal
Wearable Sensors and Systems for Wound Healing-Related pH and Temperature Detection
Previous Article in Journal
Advances in Nanofluidics
Article

Photothermal Optical Beam Steering Using Large Deformation Multi-Layer Thin Film Structures

1
Air Force Research Laboratory, Sensors Directorate, Wright-Patterson AFB, OH 45433, USA
2
Apex Microdevices LLC, West Chester, OH 45431, USA
3
KBR Wyle Corporation, Houston, TX 77002, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Niall Tait
Micromachines 2021, 12(4), 428; https://doi.org/10.3390/mi12040428
Received: 17 February 2021 / Revised: 6 April 2021 / Accepted: 12 April 2021 / Published: 14 April 2021
Photothermal actuation of microstructures remains an active area of research for microsystems that demand electrically isolated, remote, on-chip manipulation. In this study, large-deformation structures constructed from thin films traditional to microsystems were explored through both simulation and experiment as a rudimentary means to both steer and shape an incident light beam through photothermal actuation. A series of unit step infrared laser exposures were applied at increasing power levels to both uniformly symmetric and deliberately asymmetric absorptive structures with the intent of characterizing the photothermal tilt response. The results indicate that a small angle (<4° at ~74 W/cm2) mechanical tilt can be instantiated through central placement of an infrared beam, although directional control appears highly sensitive to initial beam placement. Greater responsivity (up to ~9° mechanical tilt at ~54 W/cm2) and gross directional control was demonstrated with an asymmetrical absorptive design, although this response was accompanied by a large amount (~5–10°) of mechanical tilt burn-in and drift. Rigorous device cycling remains to be explored, but the results suggest that these structures, and those similar in construction, can be further matured to achieve controllable photoactuation suitable for optical beam control or other applications. View Full-Text
Keywords: photothermal actuation; thin-film structures; micro-optics; optical beam control photothermal actuation; thin-film structures; micro-optics; optical beam control
Show Figures

Figure 1

MDPI and ACS Style

Hall, H.J.; McDaniel, S.; Shah, P.; Torres, D.; Figueroa, J.; Starman, L. Photothermal Optical Beam Steering Using Large Deformation Multi-Layer Thin Film Structures. Micromachines 2021, 12, 428. https://doi.org/10.3390/mi12040428

AMA Style

Hall HJ, McDaniel S, Shah P, Torres D, Figueroa J, Starman L. Photothermal Optical Beam Steering Using Large Deformation Multi-Layer Thin Film Structures. Micromachines. 2021; 12(4):428. https://doi.org/10.3390/mi12040428

Chicago/Turabian Style

Hall, Harris J., Sean McDaniel, Piyush Shah, David Torres, Jose Figueroa, and LaVern Starman. 2021. "Photothermal Optical Beam Steering Using Large Deformation Multi-Layer Thin Film Structures" Micromachines 12, no. 4: 428. https://doi.org/10.3390/mi12040428

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop