Published August 11, 2014 | Version v1
Journal article Metadata-only

High sensitivity and high Q-factor nanoslotted parallel quadrabeam photonic crystal cavity for real-time and label-free sensing

Creators

  • 1. School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)
  • 2. State Key Laboratory of Information Photonics and Optical Communications, School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876 (China)
  • 3. Rowland Institute at Harvard University, Cambridge, Massachusetts 02142 (United States)

Description

We experimentally demonstrate a label-free sensor based on nanoslotted parallel quadrabeam photonic crystal cavity (NPQC). The NPQC possesses both high sensitivity and high Q-factor. We achieved sensitivity (S) of 451 nm/refractive index unit and Q-factor >7000 in water at telecom wavelength range, featuring a sensor figure of merit >2000, an order of magnitude improvement over the previous photonic crystal sensors. In addition, we measured the streptavidin-biotin binding affinity and detected 10 ag/mL concentrated streptavidin in the phosphate buffered saline solution

Additional details

Identifiers

DOI
10.1063/1.4867254;

Publishing Information

Journal Title
Applied Physics Letters
Journal Volume
105
Journal Issue
6
Journal Page Range
p. 063118-063118.3
ISSN
0003-6951
CODEN
APPLAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46024216
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
BIOTIN; CRYSTALS; NANOSTRUCTURES; PERFORMANCE; PHOSPHATES; REFRACTIVE INDEX; SENSORS
Descriptors DEC
AZOLES; CARBOXYLIC ACIDS; HETEROCYCLIC ACIDS; HETEROCYCLIC COMPOUNDS; IMIDAZOLES; OPTICAL PROPERTIES; ORGANIC ACIDS; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; ORGANIC SULFUR COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHORUS COMPOUNDS; PHYSICAL PROPERTIES; VITAMIN B GROUP; VITAMINS

Optional Information

Notes
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