Abstract: An infrared (IR) radiation sensor for detection of an analyte in a fluid. The IR sensor comprises: i) a housing; ii) a reservoir disposed in the housing and configured to contain the fluid; iii) a fluid channel in communication with the reservoir; and iv) a preconcentration material associated with the fluid channel. The preconcentration material enhances IR bands in an IR spectra. The IR sensor also includes a photonic integrated circuit disposed in the housing. The photonic integrated circuit includes an IR source configured to transmit IR light toward the fluid channel and the preconcentration material. A spectral characteristic of the IR light is changed by the analyte in the fluid in the fluid channel that is trapped in the preconcentration material. The photonic IC also includes an IR detector configured to receive IR light transmitted through or reflected off the preconcentration material and detect the spectral characteristic.

Abstract: A microfluidic device and a method of detecting the presence of an analyte in a fluid. In one embodiment, the microfluidic device includes: (1) a substrate, (2) a waveguide supported by the substrate and configured to receive light and (3) a microfluidic channel contacting the waveguide and configured to convey a fluid, a characteristic of the light changing under influence of an analyte in the fluid.

Abstract: An infrared (IR) sensor and a method of detecting molecular species in a liquid. In one embodiment, the IR sensor includes: (1) an IR light source configured to emit IR light, (2) a sensing element configured to receive the IR light, the IR light generating an evanescent field about the sensing element as the IR light propagates therethrough, molecules in a subject liquid interacting with the evanescent field and affecting a characteristic of the IR light and (3) an IR light detector configured to receive the IR light from the sensing element and detect the characteristic.

Abstract: An infrared (IR) sensor and a method of detecting molecular species in a liquid. In one embodiment, the IR sensor includes: (1) an IR light source configured to emit IR light, (2) a sensing element configured to receive the IR light, the IR light generating an evanescent field about the sensing element as the IR light propagates therethrough, molecules in a subject liquid interacting with the evanescent field and affecting a characteristic of the IR light and (3) an IR light detector configured to receive the IR light from the sensing element and detect the characteristic.

Abstract: An infrared (IR) sensor and a method of detecting molecular species in a liquid. In one embodiment, the IR sensor includes: (1) an IR light source configured to emit IR light, (2) a sensing element configured to receive the IR light, the IR light generating an evanescent field about the sensing element as the IR light propagates therethrough, molecules in a subject liquid interacting with the evanescent field and affecting a characteristic of the IR light and (3) an IR light detector configured to receive the IR light from the sensing element and detect the characteristic.

Abstract: An infrared (IR) sensor and a method of detecting molecular species in a liquid. In one embodiment, the method comprises i) generating IR light from an IR light source; ii) receiving in an optical fiber the IR light from the IR light source, wherein a selective ion-exchange (IX) medium is associated with the optical fiber and the IR light generates an evanescent field about the optical fiber as the IR light propagates therethrough, the selective IX medium configured to transport an ion species in a subject liquid about the optical fiber; and iii) receiving in an IR light detector the IR light from the optical fiber, wherein the ion species affects the evanescent field and thereby a characteristic of the IR light.

Abstract: A microfluidic device and a method of detecting the presence of an analyte in a fluid. In one embodiment, the microfluidic device includes: (1) a substrate, (2) a waveguide supported by the substrate and configured to receive light and (3) a microfluidic channel contacting the waveguide and configured to convey a fluid, a characteristic of the light changing under influence of an analyte in the fluid.

Abstract: An infrared (IR) sensor and a method of detecting molecular species in a liquid. In one embodiment, the method comprises i) generating IR light from an IR light source; ii) receiving in an optical fiber the IR light from the IR light source, wherein a selective ion-exchange (IX) medium is associated with the optical fiber and the IR light generates an evanescent field about the optical fiber as the IR light propagates therethrough, the selective IX medium configured to transport an ion species in a subject liquid about the optical fiber; and iii) receiving in an IR light detector the IR light from the optical fiber, wherein the ion species affects the evanescent field and thereby a characteristic of the IR light.

Abstract: An infrared (IR) sensor and a method of detecting molecular species in a liquid. In one embodiment, the IR sensor includes: (1) an IR light source configured to emit IR light, (2) a sensing element configured to receive the IR light, the IR light generating an evanescent field about the sensing element as the IR light propagates therethrough, molecules in a subject liquid interacting with the evanescent field and affecting a characteristic of the IR light and (3) an IR light detector configured to receive the IR light from the sensing element and detect the characteristic.

Abstract: An infrared (IR) sensor and a method of detecting molecular species in a liquid. In one embodiment, the IR sensor includes: (1) an IR light source configured to emit IR light, (2) a sensing element configured to receive the IR light, the IR light generating an evanescent field about the sensing element as the IR light propagates therethrough, molecules in a subject liquid interacting with the evanescent field and affecting a characteristic of the IR light and (3) an IR light detector configured to receive the IR light from the sensing element and detect the characteristic.

Abstract: An infrared (IR) sensor and a method of detecting molecular species in a liquid. In one embodiment, the IR sensor includes: (1) an IR light source configured to emit IR light, (2) a sensing element configured to receive the IR light, the IR light generating an evanescent field about the sensing element as the IR light propagates therethrough, molecules in a subject liquid interacting with the evanescent field and affecting a characteristic of the IR light and (3) an IR light detector configured to receive the IR light from the sensing element and detect the characteristic.