Title :
Photonic crystal nanolaser bio-sensors for detecting environmental index and surface charges
Author_Institution :
Yokohama Nat. Univ., Yokohama, Japan
Abstract :
Photonic crystal nanolaser is an easily fabricated and operated semiconductor laser, which can be a high performance biosensor chip. It detects not only the environmental index of adsorbed bio-molecules as the laser wavelength shift but also the surface charge as the change in the emission intensity. This capability allows the simultaneous analysis of optical and electrical properties of target bio-molecules. Such multi-sensing is demonstrated for hybridization of DNAs. This nanolaser also shows ultrahigh sensitivity for antibody-antigen reactions of biomarker proteins and ultrahigh selectivity against contaminants, which are promising to medical diagnoses. For example, PSA for prostatic cancer is detected from 1 fM even with 10 μM contaminants, and CRMP2 for Alzheimer disease is detected from 10 pM in animal-derived sample. It is also applicable to detecting endotoxin, the environmental toxin, which must be removed in clinical treatments. A low concentration of 0.001 EU/ml is detected within 33 min by monitoring limulus amebocyte lysate reaction with endotoxin.
Keywords :
DNA; adsorption; biochemistry; biological techniques; biomedical engineering; chemical sensors; laser applications in medicine; molecular biophysics; photonic crystals; proteins; red shift; semiconductor lasers; Alzheimer disease; CRMP2; DNA hybridization; GaInAsP; GaInAsP semiconductor photonic crystal; PSA; adsorbed biomolecule environmental index; antibody-antigen reactions; biomarker proteins; emission intensity change; endotoxin detection; environmental index detection; high performance biosensor chip; laser wavelength shift; limulus amebocyte lysate reaction; multisensing; photonic crystal nanolaser biosensors; prostatic cancer; semiconductor laser; surface charge detection; target biomolecule electrical properties; target biomolecule optical properties; Biosensors; Optical surface waves; Photonic crystals; Proteins; Sensitivity; Surface treatment; biomarker; biosensor; endotoxin; nanolaser; photonic crystal;
Conference_Titel :
Transparent Optical Networks (ICTON), 2015 17th International Conference on
Conference_Location :
Budapest
DOI :
10.1109/ICTON.2015.7193322