發(fā)布時(shí)間：2018-03-31 22:00

  本文選題：銫的鈣鈦礦微米線　切入點(diǎn)：雙光子泵浦　出處：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：微型激光器作為有源器件在集成光電子領(lǐng)域有著重要應(yīng)用,它可以為系統(tǒng)提供光源,與其他集成器件一起形成具有實(shí)際功能的微型光路。隨著純無機(jī)銫的鈣鈦礦出現(xiàn),其優(yōu)異的光學(xué)性能使它很快成為新一代半導(dǎo)體材料。無機(jī)銫的鈣鈦礦以晶體的形式存在,具有微米線狀結(jié)構(gòu),在泵浦激光的激發(fā)下能夠出射激光,形成天然的微型激光器。然而,傳統(tǒng)制備方法復(fù)雜、成本過高,制備出的微米線橫截面尺寸小,只能支持具有較低品質(zhì)因數(shù)的法布里-珀羅模式激光;并且由于樣品質(zhì)量不佳,應(yīng)用于光子探測時(shí)響應(yīng)速度慢。本文為解決該問題,改進(jìn)了一步溶液法來制備純無機(jī)銫的鈣鈦礦,開展其激光性質(zhì)和光子探測能力研究。針對(duì)預(yù)期要求,提出了制備擁有較大橫截面尺寸的鈣鈦礦微米線。通過對(duì)鈣鈦礦制備方法的調(diào)研和反復(fù)摸索,本文改進(jìn)了一步溶液合成法,成功制備出高質(zhì)量、形貌統(tǒng)一并且擁有較大橫截面尺寸的微米線。本文以銫的溴化鉛鈣鈦礦微米線為例,采用飛秒脈沖激光泵浦,首次在其橫截面內(nèi)實(shí)現(xiàn)回音壁模式激光,并且品質(zhì)因數(shù)最高達(dá)7000。通過雙光子泵浦,研究了微米線的非線性效應(yīng)。同時(shí)對(duì)被測樣品建立模型進(jìn)行仿真,證實(shí)了實(shí)驗(yàn)結(jié)果的準(zhǔn)確性。理論上,純無機(jī)鈣鈦礦的穩(wěn)定性優(yōu)于有機(jī)-無機(jī)雜化鈣鈦礦,基于此,本文在飛秒脈沖激光連續(xù)泵浦和高溫加熱下,研究了兩者出射激光的穩(wěn)定性,得出和理論一致的結(jié)果。銫的溴化鉛鈣鈦礦微米線除了具有優(yōu)秀的激光特性,本文還研究了其光子探測性能。通過真空電子束蒸鍍制備出金膜電極并且搭建三維轉(zhuǎn)移平臺(tái),借助拉錐光纖將微米線轉(zhuǎn)移至金膜電極上,研究了微米線在不同條件下光生電流的變化,測量得到光子探測的響應(yīng)時(shí)間低至8 ms,比之前相關(guān)報(bào)道低了兩個(gè)數(shù)量級(jí),實(shí)現(xiàn)了快速探測。銫的溴化鉛鈣鈦礦微米線的系統(tǒng)研究,為以后集成光電子器件的發(fā)展提供了有利的幫助。
[Abstract]:As the active element micro laser has important application in the field of Integrated Optoelectronics, it can provide a source for the formation of micro optical system, together with practical function and other integrated devices. With the pure inorganic cesium perovskite, its excellent optical properties so that it will soon become a new generation of semiconductor materials. The existence of cesium inorganic perovskite in crystal form, with micron structure, can laser excitation in pumped laser, laser micro forming natural. However, the traditional preparation method of complex, high cost, the prepared micron line cross section size is small, can only support with low quality factor Fabri Perot laser and mode; due to the poor quality of the sample, used in photon detection when the slow response speed. In this paper, in order to solve this problem, the improved one step solution method to prepare pure cesium inorganic perovskite, carry out the laser Study on the properties and photon detection ability. According to the expected requirements, proposed preparation has a larger cross-sectional size of the perovskite microwires. Through research on perovskite preparation method and trial and error, this paper improves the solution step synthesis method was successfully prepared by high quality, uniform morphology and has larger cross-section size of micron line. The lead bromide cesium perovskite microwires as an example, by using femtosecond pulsed laser pumped laser for the first time, the echo wall mode in the cross section, and the quality factor of up to 7000. by two photon pumped, nonlinear effect of micron line. At the same time of the measured sample to establish simulation model, confirmed the accuracy of the test result. In theory, the stability is better than that of pure inorganic perovskite type organic-inorganic hybrid perovskite structure, based on this, this article in the femtosecond pulse laser pumped and high temperature heating, is studied The stability of laser, and obtained consistent results. The theory of perovskite lead bromide cesium microwires has excellent laser characteristics, this paper also studies the photon detection performance. By vacuum electron beam evaporation preparation of gold film electrode and build a three-dimensional transfer platform, with the help of the tapered fiber micro wire transfer to the gold film electrode, were studied under different conditions of micron line photocurrent, the measured response time of photon detection as low as 8 ms, two orders of magnitude lower than that before the relevant reports, to achieve a rapid detection system. Research on perovskite lead bromide cesium microwires, for the future development integrated optoelectronic devices provide beneficial help.

【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN248

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

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本文編號(hào)：1692625