Ion detection with photonic crystal microcavities.
We have experimentally demonstrated a cation and anion sensor by using short linear photonic crystal microcavities with an embedded quantum dot active region. The photonic crystal microcavity covered with an ion-selective polymer forms a submicrometer optical detection system sensitive to small changes of perchlorate anion (ClO4(-)) and calcium cation (Ca2+) concentrations.
Chakravarty
S
S
Solid State Electronics Laboratory, Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, Michigan 48109-2122, USA. chakrast@eecs.umich.edu
Topol'ancik
J
J
Bhattacharya
P
P
Chakrabarti
S
S
Kang
Y
Y
Meyerhoff
M E
ME