Photoacoustic detection of nanosecond-pulse-induced optical absorption in solids

Bae, Y.; Song, J. J.; Kim, Y B

doi:10.1364/ao.21.000035

Cited by 14 publications

(5 citation statements)

References 13 publications

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“…1. As to why long-lasting ultrasound can be generated by Au nanoparticles attached to the cavity, whereas suspended Au nanoparticles can only produce short pulse, we believe that this is due to a resonant mechanical coupling between the glass cavity and its attached nanoparticles (36).…”

Section: Resultsmentioning

confidence: 99%

Laser streaming: Turning a laser beam into a flow of liquid

et al. 2017

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Section: Resultsmentioning

confidence: 99%

Laser streaming: Turning a laser beam into a flow of liquid

et al. 2017

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“…Carbon particle suspensions, single‐walled, and multiwalled carbon nanotubes have been reported as excellent optical limiters mainly due to nonlinear scattering, whereas C 60 is one of the best performing materials, which shows optical limiting as a result of strong nonlinear absorption . For understanding the exact mechanism of nonlinear optical limiting, photoacoustic (PA) z‐scan is an effective method that can detect low‐level absorptions in materials . Recently, we have used the photoacoustic z‐scan (PAZ) technique to identify the amount of light absorbed by fluorinated graphene oxide upon irradiating with a 5 ns pulsed laser.…”

Section: Nonlinear Parameters Of Tis2 2d Sheets Graphene and C60 Atmentioning

confidence: 99%

“…A significant blue shift in the absorption peak is observed in the UV–vis spectrum of the TiS 2 2D sheets when compared to that of bulk as a consequence of the quantum confinement of the electronic charge carriers. This results in a larger band gap considerably above the exciton Bohr radius which is suitable for nonlinear optical activity and offers good transparency for visible light . The sharp resonance peak around 205 nm in the absorption spectrum indicates a strong excitonic effect in the TiS 2 sheets.…”

Section: Nonlinear Parameters Of Tis2 2d Sheets Graphene and C60 Atmentioning

confidence: 99%

2D TiS₂ Layers: A Superior Nonlinear Optical Limiting Material

Varma

Kumar

Liu

et al. 2017

Advanced Optical Materials

100

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not limited to solar energy harvesting, thin film transistors, light emitting diodes, sensors, optical limiters, and wearable devices. [1] Materials with enhanced optical limiting properties are of great demand in protecting various optical devices from laser radiations. A good optical limiter is a material which allows the optical radiation to pass through at low fluences but clamps the transmitted intensity as the incident laser fluence increases. This property of materials can be useful to fabricate devices for pulse shaping, [2] passive mode locking, [3] and eye protection against powerful lasers. [4] Typically, optical limiting happens in materials is due to reverse saturable absorption or excited state absorption. When a material is illuminated with a laser beam, it can absorb the laser light even when the incident laser energy is lower than the band gap of the material by two-photon absorption (2PA). However, in a direct band gap material in which the incident laser energy is higher than the band gap, the appreciable linear absorption induces free carrier absorption. [5] In the bulk form, most of the 2D dichalcogenides are indirect-band gap materials with conduction band minimum and valence band maximum located at Q and Γ points, respectively. [6] In the monolayer regime, the dichalcogenides The advancement in high power lasers has urged the requisite of efficient optical limiting materials for both eye and sensor protection. The discovery of atomically thin 2D transition metal dichacogenides with distinctive properties has paved the way for a variety of applications including optical limiting. Until recently, the optical limiting effect exhibited by 2D materials is inferior to the benchmark materials fullerene (C 60 ) and graphene. This article reports the optical limiting activity of the 2D transition metal dichal cogenide, titanium disulfide (TiS 2 ) nanosheets, using optical and photo acoustic zscan techniques. The 77% nonlinear optical limiting exhibited by the TiS 2 sheets with 73% lineartransmittance is superior to that of any other existing 2D dichalcogenide sheets, graphene, and the benchmark optical limiting material, C 60 . The enhanced nonlinear response is attributed to the concerted effect of 2photon and the induced excited state absorp tions. By using photoacoustic zscan, a unique tool developed to determine the nonlinear optical limiting mechanism in materials, it is found that the optical limiting exhibited by TiS 2 2D sheets and graphene are mainly due to nonlinear absorption rather than scattering effects. These results have opened the door for 2Ddichalcogenidematerialsbased highly efficient optical limiters, especially at low fluences.Since the advent of graphene, 2D materials have gained considerable attention owing to their incredible electrical and optical properties. Current efforts to utilize the unique features of these materials have been focused on their integration into a vast array of electrooptical applications. These include but are [+] Present address:

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“…In the following, the principles at the basis of the experimental techniques of nonlinear optical transmission, Z -scan, and DFWM will be briefly described. The reader can refer to several references ,,− for a review of the techniques.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

2016

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The control of luminous radiation has extremely important implications for modern and future technologies as well as in medicine. In this Review, we detail chemical structures and their relevant photophysical features for various groups of materials, including organic dyes such as metalloporphyrins and metallophthalocyanines (and derivatives), other common organic materials, mixed metal complexes and clusters, fullerenes, dendrimeric nanocomposites, polymeric materials (organic and/or inorganic), inorganic semiconductors, and other nanoscopic materials, utilized or potentially useful for the realization of devices able to filter in a smart way an external radiation. The concept of smart is referred to the characteristic of those materials that are capable to filter the radiation in a dynamic way without the need of an ancillary system for the activation of the required transmission change. In particular, this Review gives emphasis to the nonlinear optical properties of photoactive materials for the function of optical power limiting. All known mechanisms of optical limiting have been analyzed and discussed for the different types of materials.

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Photoacoustic detection of nanosecond-pulse-induced optical absorption in solids

Cited by 14 publications

References 13 publications

Laser streaming: Turning a laser beam into a flow of liquid

Laser streaming: Turning a laser beam into a flow of liquid

2D TiS₂ Layers: A Superior Nonlinear Optical Limiting Material

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

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Photoacoustic detection of nanosecond-pulse-induced optical absorption in solids

Cited by 14 publications

References 13 publications

Laser streaming: Turning a laser beam into a flow of liquid

Laser streaming: Turning a laser beam into a flow of liquid

2D TiS2 Layers: A Superior Nonlinear Optical Limiting Material

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

Contact Info

Product

Resources

About

2D TiS₂ Layers: A Superior Nonlinear Optical Limiting Material