Total internal reflection photoacoustic spectroscopy
First Claim
Patent Images
1. A system for conducting total internal reflection photoacoustic spectroscopy (TIRPAS), the system comprising:
- a pulsed laser source for emitting a thermally or stress confined laser beam;
a prism comprising a surface to be in contact with a sample that is to be subjected to TIRPAS, wherein the laser beam and the prism, when conducting TIRPAS, are configured such that the laser beam travels through the prism to a location at an interface between the prism and the sample at an angle of incidence such that an evanescent field extending into the sample forms; and
a detector for determining whether a photoacoustic response to the evanescent field is generated by an analyte in the sample.
2 Assignments
0 Petitions
Accused Products
Abstract
A system and method of conducting total internal reflection photoacoustic spectroscopy (TIRPAS) comprising using a pulsed laser source to emit a thermally or stress confined laser beam at a prism comprising a surface to be in contact with a sample such that the laser beam travels through the prism to a location at an interface between the prism and the sample to form an evanescent field extending into the sample to generate a detectable photoacoustic response to the evanescent field by an analyte in the sample.
-
Citations
19 Claims
-
1. A system for conducting total internal reflection photoacoustic spectroscopy (TIRPAS), the system comprising:
-
a pulsed laser source for emitting a thermally or stress confined laser beam; a prism comprising a surface to be in contact with a sample that is to be subjected to TIRPAS, wherein the laser beam and the prism, when conducting TIRPAS, are configured such that the laser beam travels through the prism to a location at an interface between the prism and the sample at an angle of incidence such that an evanescent field extending into the sample forms; and a detector for determining whether a photoacoustic response to the evanescent field is generated by an analyte in the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of conducting total internal reflection photoacoustic spectroscopy (TIRPAS), the method comprising:
-
directing a thermally or stress confined laser beam at a prism comprising a surface in contact with a sample at an angle of incidence, wherein the laser beam and the prism are configured such that the laser beam travels through the prism to a location at an interface between the prism and the sample and forms an evanescent field extending into the sample; and determining whether a photoacoustic response to the evanescent field is generated by an analyte in the sample. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification