Optical energy of spherical velocity with optical magnetic density in Heisenberg sphere space SHeis32

The effect of the volumetric ratio of the tris(8-hydroxyquinoline) aluminum (Alq3) on its blend with the N,N'-Di [(1-naphthyl)-N,N'-diphenyl]-(1,1'-biphenyl)-4,4'-diamine (NPD) (Alq3:NPD) is investigated and optimized for the UV photodetectors fabrication. The optical and structural properties of Alq3:NPD blend with different volumetric ratios 1:1, 2:1, and 3:1 is studied in the context of the absorbance, transmittance, optical energy gap and XRD patterns. Results show that the absorbance is increased by 11% at A = 260 nm with the increase in the volumetric ratio. In contrast, the optical energy bandgap that is extrapolated from the Tauc’s plot is decreased with the increase in the volumetric ratio, and the 2:1 ratio shows the lowest energy in the UV region. In terms of the XRD investigation, the 2:1 volumetric ratio shows the highest intensity for the crystallinity peak at 36.6°. The fabricated photodetector with a different volumetric ratio of the active layer Alq3:NPD blend shows the best performance with the ratio 2:1.

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Photoacoustic Energy Sensor for Nanosecond Optical Pulse Measurement

Sensors ◽

10.3390/s18113879 ◽

2018 ◽

Vol 18 (11) ◽

pp. 3879 ◽

Cited By ~ 2

Author(s):

Pil Sang ◽

Junseok Heo ◽

Hui Park ◽

Hyoung Baac

Keyword(s):

High Energy ◽

Hybrid Structure ◽

Ultrasonic Pulse ◽

Acoustic Frequency ◽

Pulse Measurement ◽

Optical Energy ◽

Energy Meter ◽

Energy Sensor ◽

Energy Pulse ◽

Spectral Ranges

We demonstrate a photoacoustic sensor capable of measuring high-energy nanosecond optical pulses in terms of temporal width and energy fluence per pulse. This was achieved by using a hybrid combination of a carbon nanotube-polydimethylsiloxane (CNT-PDMS)-based photoacoustic transmitter (i.e., light-to-sound converter) and a piezoelectric receiver (i.e., sound detector). In this photoacoustic energy sensor (PES), input pulsed optical energy is heavily absorbed by the CNT-PDMS composite film and then efficiently converted into an ultrasonic output. The output ultrasonic pulse is then measured and analyzed to retrieve the input optical characteristics. We quantitatively compared the PES performance with that of a commercial thermal energy meter. Due to the efficient energy transduction and sensing mechanism of the hybrid structure, the minimum-measurable pulsed optical energy was significantly lowered, ~157 nJ/cm2, corresponding to 1/760 of the reference pyroelectric detector. Moreover, despite the limited acoustic frequency bandwidth of the piezoelectric receiver, laser pulse widths over a range of 6–130 ns could be measured with a linear relationship to the ultrasound pulse width of 22–153 ns. As CNT has a wide electromagnetic absorption spectrum, the proposed pulsed sensor system can be extensively applied to high-energy pulse measurement over visible through terahertz spectral ranges.

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Thermal and Optical Energy Gaps in Pb0.93Sn0.07Te and Pb0.85Sn0.15Te

Journal of Applied Physics ◽

10.1063/1.1710200 ◽

1967 ◽

Vol 38 (9) ◽

pp. 3714-3720 ◽

Cited By ~ 25

Author(s):

R. N. Tauber ◽

I. B. Cadoff

Keyword(s):

Optical Energy ◽

Energy Gaps ◽

Optical Energy Gaps

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