[Th-A2-B] Novel optoelectrical phenomena in 2D materials

11:30 AM - 11:45 AM JST(2:30 AM - 2:45 AM UTC)

[Th-A2-B-03] Spatially Uniform Trion Photoluminescence in Suspended WSe₂ Monolayers Fabricated by Gold-Assisted Exfoliation

〇Giacomo Mariani¹, Riccardo Lodo¹, Keigo Matsuyama¹, Yoji Kunihashi¹, Taro Wakamura¹, Satoshi Sasaki¹, Louis Smet², Makoto Kohda^2,3,4, Junsaku Nitta^1,2, Haruki Sanada¹ (1. Basic Res. Labs., NTT, Inc. (Japan), 2. Tohoku Univ. (Japan), 3. CSIS (Japan), 4. QST (Japan))

We demonstrate the spatially uniform trion photoluminescence (PL) of suspended WSe₂ monolayers fabricated by gold-assisted exfoliation. PL mapping at 7 K over 80 µm-long trenches shows trion energy variations of around 1 meV, indicating highly homogeneous optical properties over extended suspended regions without hBN encapsulation.