On-chip spectroscopy with thermally tuned high-Q photonic crystal cavities
Abstract
Spectroscopic methods are a sensitive way to determine the chemical composition of potentially hazardous materials. Here, we demonstrate that thermally tuned high-Q photonic crystal cavities can be used as a compact high-resolution on-chip spectrometer. We have used such a chip-scale spectrometer to measure the absorption spectra of both acetylene and hydrogen cyanide in the 1550 nm spectral band and show that we can discriminate between the two chemical species even though the two materials have spectral features in the same spectral region. Our results pave the way for the development of chip-size chemical sensors that can detect toxic substances.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 11, 2016
- Source ID
- 10.1063/1.4939659
Entities
People
- Andreas C Liapis
- Boshen Gao
- Mahmudur R. Siddiqui
- Robert W. Boyd
- Zhimin Shi
Organizations
- Canada Excellence Research Chairs
- Defense Threat Reduction Agency
- National Aeronautics and Space Administration
- National Science Foundation
- University of Ottawa
- University of Rochester
- University of South Florida