Ultrafast Optical Modulation Using Single-Crystal Films of Organic Nonlinear Optical Materials

使用有机非线性光学材料单晶薄膜进行超快光调制

• 批准号: 0308657
• 负责人: Mrinal Thakur
• 金额: $ 26.21万
• 依托单位: Auburn University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0308657&HistoricalAwards=false
• 关键词: Ultrafast; Optical; Modulation; Using; Single

The objectives of this project include: i) preparation of good optical quality single crystal films of organic materials having exceptionally large second or third order optical nonlinearity, ii) establishment of appropriate methods for fabrication of special device structures using the films, iii) detailed nonlinear optical measurements and iv) demonstration of devices. The approach utilizes the "shear method" for preparation of single crystal films of organic materials. Electro-optic effects will be measured in such films at various wavelengths and used to assess modulator operability at high speed up to 100GHz. In order to increase modulation depth, the interaction length will be increased by using i) thicker films, ii) Fabry-Perot geometry and iii) a guided-wave configuration. Demonstration of femtosecond all-optical modulation using single-crystal films is anticipated. Measurements will be made by time-resolved techniques with 150 fs pulses in single-pass or reflective mode operation and also using a Fabry-Perot cavity. %%% The project addresses fundamental research issues associated with electronic/photonic materials having technological relevance. The project directly involves one graduate student and a postdoctoral fellow. Additionally, the project has broader impact in training undergraduate students, and developing and maintaining multidisciplinary collaborations in this field. The PI teaches specific courses in senior undergraduate and graduate levels that make use of the optics laboratory in demonstrating fundamental principles to students. Because of the multidisciplinary nature of the proposed research, students across disciplines will be recruited to perform research tasks. Under-represented, minority and undergraduate students will be involved to provide them with a broader and stronger scientific and technological experience. The program is expected to increase the skilled workforce in an important field of optoelectronics with a special emphasis on enhancing participation of under-represented minorities. ***

该项目的目标包括：i）制备具有特别大的二阶或三阶光学非线性的良好光学质量的有机材料单晶薄膜，ii）建立使用薄膜制造特殊器件结构的适当方法，iii）详细的非线性光学测量和iv）器件演示。该方法利用“剪切法”制备有机材料的单晶薄膜。将在不同波长下测量此类薄膜的电光效应，并用于评估调制器在高达 100GHz 的高速下的可操作性。为了增加调制深度，将通过使用 i) 较厚的薄膜、ii) 法布里-珀罗几何结构和 iii) 导波配置来增加相互作用长度。预计将使用单晶薄膜演示飞秒全光调制。测量将通过时间分辨技术进行，在单程或反射模式操作下使用 150 fs 脉冲，并使用法布里-珀罗腔。 %%% 该项目解决与具有技术相关性的电子/光子材料相关的基础研究问题。该项目直接涉及一名研究生和一名博士后。此外，该项目在培养本科生以及发展和维持该领域的多学科合作方面具有更广泛的影响。 PI 在高年级本科生和研究生阶段教授特定课程，利用光学实验室向学生展示基本原理。由于拟议研究的多学科性质，将招募跨学科的学生来执行研究任务。代表性不足的少数族裔和本科生将参与其中，为他们提供更广泛、更强的科技经验。该计划预计将增加光电子这一重要领域的熟练劳动力，特别强调增强代表性不足的少数族裔的参与。 ***