Ultrafast Phenomena and Nanophotonics XXIII最新文献

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-05-10 DOI: 10.1117/12.2531141

引用次数: 0

Optomechanical engineering: manipulating light and vibrations in the GHz regime (Conference Presentation) 光机械工程:在GHz范围内操纵光和振动(会议报告)

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-13 DOI: 10.1117/12.2509996

Daniel Lanzillotti-Kimura

引用次数: 0

Switching between excitonic emission and carrier depletion by surface defects in inorganic lead halide perovskites 无机卤化铅钙钛矿表面缺陷在激子发射和载流子耗尽之间的切换

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-08 DOI: 10.1117/12.2512687

Handong Sun

引用次数: 0

Extremely nondegenerate two-photon absorption in silicon (Conference Presentation) 硅中的极非简并双光子吸收(会议报告)

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-05 DOI: 10.1117/12.2510538

N. Cox, D. Hagan, E. W. Stryland

引用次数: 3

Nonlinear Fresnel coefficients due to giant ultrafast nonlinearities in indium tin oxide (Conference Presentation) 氧化铟锡中巨大超快非线性引起的非线性菲涅耳系数(会议报告)

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-05 DOI: 10.1117/12.2510690

S. Benis, Natalia Múnera, Rodrigo Acuña, D. Hagan, E. W. Stryland

{"title":"Nonlinear Fresnel coefficients due to giant ultrafast nonlinearities in indium tin oxide (Conference Presentation)","authors":"S. Benis, Natalia Múnera, Rodrigo Acuña, D. Hagan, E. W. Stryland","doi":"10.1117/12.2510690","DOIUrl":"https://doi.org/10.1117/12.2510690","url":null,"abstract":"We present measurements of nonlinear refraction and absorption in transparent conductive oxides (TCO), which are essentially highly-doped semiconductors, at Epsilon-Near-Zero (ENZ). In this spectral region, where the real part of the permittivity crosses zero, materials demonstrate interesting nonlinear properties such as enhanced harmonic generation, nonlinear absorption (NLA), and nonlinear refraction (NLR). We find that induced changes in the refractive index of Indium Tin Oxide, can be very large with respect to the initial index. This means that the even the Fresnel coefficients are highly irradiance-dependent. Therefore, the nonlinear transmission, reflection, and absorption of the material will be significantly different from conventional materials which means that it is challenging to use conventional methods such as Z-Scan and time-resolved transmission and reflection techniques to accurately determine the underlying nonlinear optical coefficients. We have studied optical nonlinearities of TCOs using the Beam-Deflection (BD) method to independently characterize the temporal dynamics and polarization dependence of the NLR. This method enables us to resolve NLR in the presence of large NLA backgrounds. In addition, we can also study the dependence on relative polarization and incidence angle of excitation and probe waves to characterize the enhancement mechanism and the physical origin of the nonlinear response. We conduct these BD measurements in conjunction with Z-Scan and transient reflection and transmission at different wavelengths, incidence angle, and polarization. Our measurements reveal that there is a strong wavelength dependence of nonlinearities around the ENZ point. We find that the wavelength dependence is quite different for excitation and probe waves.","PeriodicalId":154511,"journal":{"name":"Ultrafast Phenomena and Nanophotonics XXIII","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127652660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Generation of single-photon and two-photon pulses from a quantum two-level system (Conference Presentation) 量子二能级系统产生单光子和双光子脉冲(会议报告)

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-05 DOI: 10.1117/12.2509918

L. Hanschke, K. Fischer, J. Wierzbowski, Stefan Appel, D. Lukin, Shuo Sun, Rahul Trivedi, Malte Kremser, T. Simmet, C. Dory, J. Vučković, J. Finley, K. Müller

引用次数: 0

Ultrafast optical pulse shaping using dielectric metasurfaces (Conference Presentation) 使用介电超表面的超快光脉冲整形(会议报告)

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-05 DOI: 10.1117/12.2510604

A. Agrawal, Shawn Divitt, Wenqi Zhu, Cheng Zhang, H. Lezec

{"title":"Ultrafast optical pulse shaping using dielectric metasurfaces (Conference Presentation)","authors":"A. Agrawal, Shawn Divitt, Wenqi Zhu, Cheng Zhang, H. Lezec","doi":"10.1117/12.2510604","DOIUrl":"https://doi.org/10.1117/12.2510604","url":null,"abstract":"Since the invention of femtosecond pulsed lasers, the field of ultrafast optical science and technology has seen significant progress in the generation and characterization of ultrashort optical pulses. Complimentary to development in generation and characterization techniques, arbitrary temporal shaping of optical pulses has become an integral part of the field. Fourier-transform pulse shaping is the most widely adopted approach that entails parallel modulation of spatially separated frequency components to achieve the desired pulse shape. Recently, dielectric metasurfaces have emerged as a powerful technology for arbitrary control over the amplitude, phase, or polarization of light in a single, compact optical element. Here, we experimentally demonstrate shaping of sub-10 fsec ultrafast optical pulses using a centimeter-scale silicon metasurface acting as both amplitude and phase modulation mask. The deep-subwavelength silicon nanostructures, positioned with nanometer precision, are individual optimized to provide accurate amplitude and phase modulations to each frequency component. Masks of this type offer a lower cost, larger size, higher resolution, high diffraction efficiency, high damage threshold method for controlling ultrafast pulses. The high precision with which metasurfaces can control polarization, amplitude, and phase point toward new, previously unrealizable applications in optical pulse shaping.","PeriodicalId":154511,"journal":{"name":"Ultrafast Phenomena and Nanophotonics XXIII","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115471026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strong coupling and induced transparency with single quantum dots and plasmons: Towards ultrafast all-optical modulation at the nanoscale (Conference Presentation) 单量子点和等离子体激元的强耦合和诱导透明:迈向纳米尺度的超快全光调制(会议报告)

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-05 DOI: 10.1117/12.2508003

M. Pelton

引用次数: 0

Coherent oscillations in the THz response of single crystal methylammonium lead triiodide (Conference Presentation) 三碘化铅甲基铵单晶太赫兹响应的相干振荡(会议报告)

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-05 DOI: 10.1117/12.2507324

Yang Lan, C. Ponseca, B. Dringoli, D. Valverde-Chávez, M. Sutton, Yihui He, M. Kanatzidis, D. Cooke

引用次数: 0

Photon echo generation using chirped pulses in quantum dots (Conference Presentation) 利用啁啾脉冲在量子点中产生光子回波(会议报告)

Ultrafast Phenomena and Nanophotonics XXIII Pub Date : 2019-03-05 DOI: 10.1117/12.2508198

M. Watanabe, Naoto Aonuma, K. Akahane, J. Ishi-Hayase

引用次数: 0