Laser-based ultrasound detection using photorefractive quantum wells

Lahiri, I.; Pyrak‐Nolte, L. J.; Nolte, David D.; Melloch, M. R.; Kruger, Robert A.; Bacher, G. D.; Klein, Martin

doi:10.1063/1.122078

Cited by 59 publications

(23 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[153,154] The polymeric material exhibits a detection threshold which is only a factor of three from the theoretical limit. This is comparable to values achieved in semiconductor heterostructures [155] and a factor of ten better than in inorganic crystals. [156] Applications of vibrational analysis are remote sensing, manufacturing diagnostics, and in-service inspection, especially in problematic environments such as high-temperature or hazardous areas.…”

Section: Vibration Analysissupporting

confidence: 70%

Materials Design and Physics of Organic Photorefractive Systems

Zilker¹

2000

ChemPhysChem

View full text Add to dashboard Cite

Section: Vibration Analysissupporting

confidence: 70%

Materials Design and Physics of Organic Photorefractive Systems

Zilker¹

2000

ChemPhysChem

View full text Add to dashboard Cite

“…A useful figure for the characterization of interferometers is therefore Noise Equivalent Surface Displacement (NESD). Its common definition is normalized to 1 Hz RBW an 1 W incident optical power on the photo detector [14]. The received optical power, however, is usually not known to the LDV user.…”

Section: Minimum Requirementsmentioning

confidence: 99%

Sources of measurement error in laser Doppler vibrometers and proposal for unified specifications

Siegmund

2008

Eighth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications

View full text Add to dashboard Cite

The focus of this paper is to disclose sources of measurement error in laser Doppler vibrometers (LDV) and to suggest specifications, suitable to describe their impact on measurement uncertainty. Measurement errors may be caused by both the optics and electronics sections of an LDV, caused by non-ideal measurement conditions or imperfect technical realisation. While the contribution of the optics part can be neglected in most cases, the subsequent signal processing chain may cause significant errors. Measurement error due to non-ideal behaviour of the interferometer has been observed mainly at very low vibration amplitudes and depending on the optical arrangement. The paper is organized as follows: Electronic signal processing blocks, beginning with the photo detector, are analyzed with respect to their contribution to measurement uncertainty. A set of specifications is suggested, adopting vocabulary and definitions known from traditional vibration measurement equipment. Finally a measurement setup is introduced, suitable for determination of most specifications utilizing standard electronic measurement equipment.

show abstract

“…[157][158][159] PRQWs are semi-insulating optoelectronic devices 158 based on semiconductor multiple quantum wells. They have applications in laser-based ultrasound detection, 157,160 optical coherence imaging, [161][162][163][164] and femtosecond pulse manipulation. [165][166][167] A spinning disk carrying patterned protein films through a focused laser beam represents a highfrequency phase modulation that can be captured under phase-locked conditions using adaptive interferometry.…”

Section: Adaptive Optical Biocdmentioning

confidence: 99%

Invited Review Article: Review of centrifugal microfluidic and bio-optical disks

Nolte

2009

Review of Scientific Instruments

View full text Add to dashboard Cite

Spinning biodisks have advantages that make them attractive for specialized biochip applications. The two main classes of spinning biodisks are microfluidic disks and bio-optical compact disks ͑BioCD͒. Microfluidic biodisks take advantage of noninertial pumping for lab-on-a-chip devices using noninertial valves and switches under centrifugal and Coriolis forces to distribute fluids about the disks. BioCDs use spinning-disk interferometry, under the condition of common-path phase quadrature, to perform interferometric label-free detection of molecular recognition and binding. The optical detection of bound molecules on a disk is facilitated by rapid spinning that enables high-speed repetitive sampling to eliminate 1 / f noise through common-mode rejection of intensity fluctuations and extensive signal averaging. Multiple quadrature classes have been developed, such as microdiffraction, in-line, phase contrast, and holographic adaptive optics. Thin molecular films are detected through the surface dipole density with a surface height sensitivity for the detection of protein spots that is approximately 1 pm. This sensitivity easily resolves a submonolayer of solid-support immobilized antibodies and their antigen targets. Fluorescence and light scattering provide additional optical detection techniques on spinning disks. Immunoassays have been applied to haptoglobin using protein A/G immobilization of antibodies and to prostate specific antigen. Small protein spots enable scalability to many spots per disk for high-throughput and highly multiplexed immonoassays.

show abstract

Laser-based ultrasound detection using photorefractive quantum wells

Cited by 59 publications

References 15 publications

Materials Design and Physics of Organic Photorefractive Systems

Materials Design and Physics of Organic Photorefractive Systems

Sources of measurement error in laser Doppler vibrometers and proposal for unified specifications

Invited Review Article: Review of centrifugal microfluidic and bio-optical disks

Contact Info

Product

Resources

About