论文信息 - Heavy water detection using ultra-high-Q microcavities.

Heavy water detection using ultra-high-Q microcavities.

Ultra-high-Q optical microcavities (Q>10 to the 7th) provide one method for distinguishing chemically similar species. Resonators immersed in H2O have lower quality factors than those immersed in D2O due to the difference in optical absorption. This difference can be used to create a D2O detector. This effect is most noticeable at 1300 nm, where the Q(H2O) is 10(to the 6th) and the Q(D2O) is 10(to the 7th). By monitoring Q, concentrations of 0.0001% [1 part in 10(to the 6th) per volume] of D2O in H2O have been detected. This sensitivity represents an order of magnitude improvement over previous techniques. Reversible detection was also demonstrated by cyclic introduction and flushing of D2O.

Andrea M. Armani | Kerry J. Vahala

[1] K. Vahala,et al. Ideality in a fiber-taper-coupled microresonator system for application to cavity quantum electrodynamics. , 2003, Physical review letters.

[2] Andrea M. Armani,et al. Ultra-high-Q microcavity operation in H2O and D2O , 2005 .

[3] J E Heebner,et al. Sensitive disk resonator photonic biosensor. , 2001, Applied optics.

[4] G. M. Hale,et al. Optical Constants of Water in the 200-nm to 200-microm Wavelength Region. , 1973, Applied optics.

[5] A. Webb,et al. Nanoliter-volume 1H NMR detection using periodic stopped-flow capillary electrophoresis. , 1999, Analytical chemistry.

[6] D. Bićanić,et al. Novel Instrumental Approach to the Measurement of Total Body Water: Optothermal Detection of Heavy Water in the Blood Serum , 1999 .

[7] T. J. Kippenberg,et al. Ultra-high-Q toroid microcavity on a chip , 2003, Nature.

[8] S. Blair,et al. Resonant-enhanced evanescent-wave fluorescence biosensing with cylindrical optical cavities. , 2001, Applied optics.