Emission Engineering in Germanium Nanoresonators

被引：26

作者：

Celebrano, Michele ^{[1
,2
]}

Baselli, Milena ^{[1
,2
]}

Bollani, Monica ^{[3
]}

Frigerio, Jacopo ^{[4
]}

Shehata, Andrea Bahgat ^{[5
]}

Della Frera, Adriano ^{[5
]}

Tosi, Alberto ^{[5
]}

Farina, Andrea ^{[6
]}

Pezzoli, Fabio ^{[7
]}

Osmond, Johann ^{[8
]}

Wu, Xiaofei ^{[9
]}

Hecht, Bert ^{[9
]}

Sordan, Roman ^{[4
]}

Chrastina, Daniel ^{[4
]}

Isella, Giovanni ^{[4
]}

Duo, Lambert ^{[1
,2
]}

Finazzi, Marco ^{[1
,2
]}

Biagioni, Paolo ^{[1
,2
]}

机构：

[1] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy

[2] Politecn Milan, L NESS, I-20133 Milan, Italy

[3] CNR, Ist Foton & Nanotecnol, I-22100 Como, Italy

[4] Politecn Milan, Dipartimento Fis, L NESS, I-22100 Como, Italy

[5] Politecn Milan, Dipartimento Elettron Informaz & Bioingn, I-20133 Milan, Italy

[6] CNR, Ist Foton & Nanotecnol, I-20133 Milan, Italy

[7] Univ Milano Bicocca, Dipartimento Sci Mat, L NESS, I-20125 Milan, Italy

[8] ICFO Inst Ciencies Foton, Barcelona 08860, Spain

[9] Univ Wurzburg, Nanoopt & Biophoton Grp, Dept Expt Phys 5, Rontgen Res Ctr Complex Mat RCCM,Phys Inst, D-97074 Wurzburg, Germany

来源：

ACS PHOTONICS | 2015年 / 2卷 / 01期

关键词：

silicon photonics; germanium emitter; optical antennas; waveguide resonators; LIGHT-EMISSION; GE; STRAIN; GAIN;

D O I：

10.1021/ph500432k

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We experimentally investigate the smallest germanium waveguide cavity resonators on silicon that can be designed to work around 1.55 mu m wavelength and observe an almost 30-fold enhancement in the collected spontaneous emission per unit volume when compared to a continuous germanium film of the same thickness. The enhancement is due to an effective combination of (i) excitation enhancement at the pump wavelength, (ii) emission enhancement (Purcell effect) at the emission wavelength, and (iii) effective beaming by the nanoresonators, which act as optical antennas to enhance the radiation efficiency. Our results set a basis for the understanding and engineering of light emission based on subwavelength, CMOS-compatible nanostructures operating at telecommunication wavelengths.

引用

页码：53 / 59

页数：7

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