Abstract
Polymer microring resonators fabricated by nanoimprinting are presented as a means of ultrasound detection. Acoustic waves impinging on a ring-shaped optical resonator cause strain in the ring dimensions, modulating optical output. Basic acoustic and optical characteristics of the microring sensor are presented. Measurements at several frequencies show a high sensitivity and low noise-equivalent pressure. The angular response is determined by sensing the optoacoustic excitation of a 49 μm polyester microsphere and shows wide-angle sensitivity. A1-D array consisting of four microrings is demonstrated using wavelength multiplexing for addressing each element. The high sensitivity, bandwidth, and angular response make it a potentially useful sensor platform for many applications including high-frequency ultrasonic and photoacoustic imaging.
Original language | English (US) |
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Pages (from-to) | 191-197 |
Number of pages | 7 |
Journal | IEEE Journal on Selected Topics in Quantum Electronics |
Volume | 14 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2008 |
Bibliographical note
Funding Information:Manuscript received September 6, 2007; revised November 20, 2007. This work was supported by the NIH under Grant EB004933-01 and Grant EB007619-01A1.
Keywords
- Acoustic detectors
- Acoustic devices
- Microresonators
- Optical resonance
- Optical resonators
- Optical strip waveguides
- Optical waveguide components
- Optical waveguides
- Ultrasound detector