SGER: Tera-Hertz Polarization-Switching Surface-Emitting Lasers

SGER：太赫兹偏振切换表面发射激光器

• 批准号: 9526515
• 负责人: Stephen Chou
• 金额: $ 5万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-08-01 至 1996-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9526515&HistoricalAwards=false
• 关键词: SGER; Tera; Hertz; Polarization; Switching

9526515 Chou The goal of the proposed research is to experimentally demonstrate an innovative ultra-high frequency polarization-switching vertical-cavity surface-emitting laser (PS-VCSEL) that we have proposed recently 1 . the innovative laser is based on our recent development of the artificial quarter-wave plates that employ nanoscale amorphous silicon gratings with periods less than the wavelength of light (i.e.: subwavelength) 2 . The unique feature of the subwavelength-grating quarter-wave plate is that its birefringence is over three orders of magnitude higher than that in a natural birefringence crystal such as quartz. Therefore, use of such subwavelength-grating quarter-wave plate will reduce the extended cavity of PS-VCSEL by three order of magnitude and increase the oscillation frequency by three orders of magnitude. ***

本文提出的研究目标是通过实验验证我们最近提出的一种创新的超高频偏振开关垂直腔表面发射激光器（PS-VCSEL）。创新的激光器是基于我们最近开发的人造四分之一波片，它采用周期小于光波长的纳米级非晶硅光栅（即：亚波长）2。亚波长光栅四分之一波片的独特之处在于它的双折射比天然双折射晶体（如石英）高出三个数量级以上。因此，使用这种亚波长光栅四分之一波片将使PS-VCSEL的扩展腔减少三个数量级，振荡频率增加三个数量级。＊＊＊