Abstract: An optomechanical oscillator for measuring a magnetic field may include a fixed substrate, a moveable mass separated from the fixed substrate by a slot, a photonic crystal comprising an optomechanical cavity formed at the slot, and a current source operably coupled to provide current to the photonic crystal. The moveable mass may be moveable responsive to placement of the optomechanical oscillator in a magnetic field based on interaction of the magnetic field and the current. The magnetic field may be measureable based on displacement of the moveable mass.

Abstract: A device for detecting a presence of an object includes an optical phased array, a detector, a processing portion and an indicator. The optical phased array can transmit a first optical beam to a first location at a first time and can transmit a second optical beam to a second location at a second time. The detector can detect a first reflected beam based on the first optical beam and can detect a second reflected beam based on the second optical beam. The processing portion can determine the presence of the object based on the first reflected beam and the second reflected beam. The indicator can generate an indicator signal based on the presence of the object.

Abstract: A device for detecting a presence of an object includes an optical phased array, a detector, a processing portion and an indicator. The optical phased array can transmit a first optical beam to a first location at a first time and can transmit a second optical beam to a second location at a second time. The detector can detect a first reflected beam based on the first optical beam and can detect a second reflected beam based on the second optical beam. The processing portion can determine the presence of the object based on the first reflected beam and the second reflected beam. The indicator can generate an indicator signal based on the presence of the object.

Abstract: A photomultiplier tube includes a photocathode, a first electrode, and a second electrode opposedly disposed to the first electrode and separated from it to create a space therebetween. An anode opposedly disposed to the photocathode. The first electrode and the second electrode are disposed between the anode and the photocathode. The photocathode is adjacent to the first electrode and separated from it, and the anode is adjacent to the second electrode and separated from it. An amplifying medium is disposed in the space between the first electrode and the second electrode. The amplifying medium includes metal oxide nanoparticles and/or an aerogel. The metal oxide nanoparticles have an aspect ratio greater than or equal to about 5.

Abstract: A sensor assembly includes a carbon nanotube bundle and a controller. The carbon nanotube bundle is integrated into a host material and extends along a predetermined dimension of the host material. The controller is configured to control transmission of radio frequency energy through the carbon nanotube bundle to determine a round trip time between transmission and reception of the radio frequency energy at a proximal end of the carbon nanotube bundle responsive to reflection of the radio frequency energy at a distal end of the carbon nanotube bundle.

Abstract: An optomechanical oscillator for measuring a magnetic field may include a fixed substrate, a moveable mass separated from the fixed substrate by a slot, a photonic crystal comprising an optomechanical cavity formed at the slot, and a current source operably coupled to provide current to the photonic crystal. The moveable mass may be moveable responsive to placement of the optomechanical oscillator in a magnetic field based on interaction of the magnetic field and the current. The magnetic field may be measureable based on displacement of the moveable mass.

Abstract: A device for detecting a presence of an object includes an optical phased array, a detector, a processing portion and an indicator. The optical phased array can transmit a first optical beam to a first location at a first time and can transmit a second optical beam to a second location at a second time. The detector can detect a first reflected beam based on the first optical beam and can detect a second reflected beam based on the second optical beam. The processing portion can determine the presence of the object based on the first reflected beam and the second reflected beam. The indicator can generate an indicator signal based on the presence of the object.

Abstract: A sensor assembly includes a carbon nanotube bundle and a controller. The carbon nanotube bundle is integrated into a host material and extends along a predetermined dimension of the host material. The controller is configured to control transmission of radio frequency energy through the carbon nanotube bundle to determine a round trip time between transmission and reception of the radio frequency energy at a proximal end of the carbon nanotube bundle responsive to reflection of the radio frequency energy at a distal end of the carbon nanotube bundle.

Abstract: The present invention provides a device is provided for use with a first through fourth light beams. The device includes a first through fourth waveguides and first through fourth light scattering portions. The first waveguide has a length and a width and is arranged to receive the first light beam, wherein the length is larger than the width. The second waveguide is parallel with the first waveguide and is arranged to receive the second light beam. The third waveguide is disposed perpendicularly to and intersecting with the first waveguide and the second waveguide. The third waveguide is arranged to receive the third light beam. The fourth waveguide is parallel with the third waveguide and is disposed perpendicularly to and intersecting with the first waveguide and the second waveguide. The fourth waveguide is arranged to receive the fourth light beam. The first light scattering portion is disposed at the intersection of the first waveguide and the third waveguide.

Abstract: A photomultiplier tube includes a photocathode, a first electrode, and a second electrode opposedly disposed to the first electrode and separated from it to create a space therebetween. An anode opposedly disposed to the photocathode. The first electrode and the second electrode are disposed between the anode and the photocathode. The photocathode is adjacent to the first electrode and separated from it, and the anode is adjacent to the second electrode and separated from it. An amplifying medium is disposed in the space between the first electrode and the second electrode. The amplifying medium includes metal oxide nanoparticles and/or an aerogel. The metal oxide nanoparticles have an aspect ratio greater than or equal to about 5.

Abstract: A device for detecting a presence of an object includes an optical phased array, a detector, a processing portion and an indicator. The optical phased array can transmit a first optical beam to a first location at a first time and can transmit a second optical beam to a second location at a second time. The detector can detect a first reflected beam based on the first optical beam and can detect a second reflected beam based on the second optical beam. The processing portion can determine the presence of the object based on the first reflected beam and the second reflected beam. The indicator can generate an indicator signal based on the presence of the object.

Abstract: The present invention provides a device is provided for use with a first through fourth light beams. The device includes a first through fourth waveguides and first through fourth light scattering portions. The first waveguide has a length and a width and is arranged to receive the first light beam, wherein the length is larger than the width. The second waveguide is parallel with the first waveguide and is arranged to receive the second light beam. The third waveguide is disposed perpendicularly to and intersecting with the first waveguide and the second waveguide. The third waveguide is arranged to receive the third light beam. The fourth waveguide is parallel with the third waveguide and is disposed perpendicularly to and intersecting with the first waveguide and the second waveguide. The fourth waveguide is arranged to receive the fourth light beam. The first light scattering portion is disposed at the intersection of the first waveguide and the third waveguide.